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- Author:
- Qiang Li; Ye Ding; Lijun Yang; Linlin Li; Yang Wang
- Source:
- Carbon 2021 v.172 pp. 144-153
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; carbon; electrodes; graphene oxide; irradiation; photochemistry
- Abstract:
- ... Reduction and patterning of graphene oxide (GO) have been extensively applied in the field of electronic devices such as sensor, transistors and power source. Surface morphology and reduction level of reduced graphene oxide (rGO) directly influence the performance of devices. Herein, we put forward a new method of one-step periodic nanopatterning and reduction of GO using femtosecond laser pulses ...
- DOI:
- 10.1016/j.carbon.2020.09.096
- https://doi.org/10.1016/j.carbon.2020.09.096
- Author:
- Jinfeng Li; Wei Jiang
- Source:
- Industrial crops and products 2021 v.174 pp. 114205
- ISSN:
- 0926-6690
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; air; calorimetry; carbon; combustion; cotton; cotton fabric; durability; flame retardants; heat; nuclear magnetic resonance spectroscopy; oxygen; temperature; thermal degradation; thermogravimetry; weight gain
- Abstract:
- ... A novel triethylenetetramine-phosphorous acid-based flame retardant (FR) containing high amounts of P and N elements was designed and characterized by Fourier transform infrared (FT-IR) and nuclear magnetic resonance spectroscopy (¹H NMR, ¹³C NMR, and ³¹P NMR). The FR can be grafted onto cotton fabric via P-O-C covalent bonds. The limiting oxygen index (LOI) value of 26.5% weight gain (WG) treated ...
- DOI:
- 10.1016/j.indcrop.2021.114205
- https://doi.org/10.1016/j.indcrop.2021.114205
- Author:
- Lucía Rossi; Magdalena Palacio; Paula I. Villabrille; Janina A. Rosso
- Source:
- Environmental science and pollution research 2021 v.28 no.19 pp. 24112-24123
- ISSN:
- 0944-1344
- Subject:
- 4-chlorophenol; Lewis acids; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; ammonium; humic acids; irradiation; p-nitrophenol; phenol; photocatalysts; pollutants; pollution; reflectance spectroscopy; research; sol-gel processing; titanium dioxide; vanadium; vanadyl ions
- Abstract:
- ... V-doped TiO₂ materials (0.01, 0.05, 0.10, and 1.00 nominal atomic %) were synthesized by the sol-gel method and characterized by X-ray diffraction, Raman spectroscopy, UV–visible diffuse reflectance spectroscopy, N₂ adsorption–desorption isotherms, X-ray photoelectron spectroscopy, and H₂-temperature programmed reduction. Two vanadium precursors (vanadyl acetylacetonate and ammonium metavanadate) ...
- DOI:
- 10.1007/s11356-021-12339-5
- https://doi.org/10.1007/s11356-021-12339-5
- Author:
- Zhongyi Huang; Liubin Shi; Yaseen Muhammad; Lishuo Li
- Source:
- Journal of colloid and interface science 2021 v.586 pp. 423-432
- ISSN:
- 0021-9797
- Subject:
- Eucalyptus; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; biochar; biomass; crystal structure; gasification; hydrochars; hydrothermal carbonization; ionic liquids; temperature; thermogravimetry
- Abstract:
- ... This project studies the relationship between the carbonization temperature and ionic liquid (IL) ([Bmim]Cl and [Bmim]OAC) solution and its impact on the structure, properties and gasification reactivity of the hydrochar obtained from eucalyptus via hydrothermal carbonization (HTC). The structure of hydrochar was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoe ...
- DOI:
- 10.1016/j.jcis.2020.10.106
- https://doi.org/10.1016/j.jcis.2020.10.106
- Author:
- Fatima Akhtar; Jaroslaw Dabrowski; Marco Lisker; Yuji Yamamoto; Andreas Mai; Christian Wenger; Mindaugas Lukosius
- Source:
- ACS applied materials & interfaces 2020 v.12 no.2 pp. 3188-3197
- ISSN:
- 1944-8252
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; graphene; oxidation; oxygen; scanning electron microscopy; vapors
- Abstract:
- ... The oxidation behavior of Ge(001) and Ge(110) surfaces underneath the chemical vapor deposition (CVD)-grown graphene films has been investigated experimentally and interpreted on the basis of ab initio calculations. Freshly grown samples were exposed to air for more than 7 months and periodically monitored by X-ray photoelectron spectroscopy, scanning electron microscopy, and Raman spectroscopy. T ...
- DOI:
- 10.1021/acsami.9b18448
- https://doi.org/10.1021/acsami.9b18448
- Author:
- Guangtuan Huang; Jingwen Chen; Shuangshuang Gao
- Source:
- Water, air, and soil pollution 2020 v.231 no.8 pp. 389
- ISSN:
- 0049-6979
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; electrochemistry; electrodes; electrosynthesis; graphene; iron; pH; soil pollution; steel; temperature; water
- Abstract:
- ... Due to the serious pollution and great harm of steel pickling waste liquor, the treatment of the waste liquor with high concentration of iron ion has been a problem in a lot of countries around the world. A simple electrochemical method is proposed for recovering iron from steel pickling waste liquor with graphite plates as electrodes. This study investigated the effects of reaction parameters on ...
- DOI:
- 10.1007/s11270-020-04654-3
- https://doi.org/10.1007/s11270-020-04654-3
- Author:
- Ljalem Hadush Abrha; Tesfaye Teka Hagos; Yosef Nikodimos; Hailemariam Kassa Bezabh; Gebregziabher Brhane Berhe; Teklay Mezgebe Hagos; Chen-Jui Huang; Wodaje Addis Tegegne; Shi-Kai Jiang; Haile Hisho Weldeyohannes; She-Huang Wu; Wei-Nien Su; Bing Joe Hwang
- Source:
- ACS applied materials & interfaces 2020 v.12 no.23 pp. 25709-25717
- ISSN:
- 1944-8252
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; anodes; calcium; drying; electrochemistry; electrolytes; lithium; pellets; zirconium
- Abstract:
- ... Li₇La₃Zr₂O₁₂ (LLZO) garnet is one kind of solid electrolyte drawing extensive attention due to its good ionic conductivity, safety, and stability toward lithium metal anodes. However, the stability problem during synthesis and storage results in high interfacial resistance and prevents it from practical applications. We synthesized air-stable dual-doped Li₆.₀₅La₃Ga₀.₃Zr₁.₉₅Nb₀.₀₅O₁₂ ((Ga, Nb)-LLZO ...
- DOI:
- 10.1021/acsami.0c01289
- https://doi.org/10.1021/acsami.0c01289
- Author:
- N. Arisnabarreta; P. Paredes-Olivera; F. P. Cometto; E. M. Patrito
- Source:
- Journal of physical chemistry 2019 v.123 no.28 pp. 17283-17295
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; copper; crystal structure; cupric oxide; density functional theory; disulfides; electrochemistry; ethanol; hexane; mathematical theory; oxidation; oxygen production; sodium hydroxide; solvents; thiols
- Abstract:
- ... We investigated the conversion of electrochemically grown CuO into copper–alkanethiolate lamellar structures supported on a Cu substrate upon immersion in solutions of n-alkanethiols. After considering different preparation conditions (alkyl chain length, thiol concentration, and type of solvent), we found that the oxide can be rapidly converted into compact and highly passivating lamellar layers ...
- DOI:
- 10.1021/acs.jpcc.9b03264
- https://doi.org/10.1021/acs.jpcc.9b03264
9. Removal of aqueous chromium and environmental CO2 by using photocatalytic TiO2 doped with tungsten
- Author:
- M. Trejo-Valdez; S.R. Hernández-Guzmán; M.E. Manriquez-Ramírez; H. Sobral; H. Martínez-Gutiérrez; C. Torres-Torres
- Source:
- Journal of hazardous materials 2019 v.370 pp. 196-202
- ISSN:
- 0304-3894
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; anions; carbon dioxide; chromium; dispersions; irradiation; mineralization; oxygen; photocatalysis; photocatalysts; scanning electron microscopy; titanium dioxide; transmission electron microscopy; tungsten oxide; white light
- Abstract:
- ... Removal of hexavalent chromium was accomplished by using photocatalyst materials of TiO2 doped with tungsten oxide, environmental air as oxygen supply and white light as irradiation source. Dichromate anions in concentration ranges of 50 to 1000 μg/L were removed by means of aqueous dispersions of TiO2 doped with tungsten. The aqueous chromium analyses were performed by Differential Pulse Voltamme ...
- DOI:
- 10.1016/j.jhazmat.2018.05.008
- https://doi.org/10.1016/j.jhazmat.2018.05.008
- Author:
- M. Kovendhan; Hari Kang; Sangmin Jeong; Jong-Sang Youn; Inhwan Oh; Young-Kwon Park; Ki-Joon Jeon
- Source:
- Environmental research 2019 v.173 pp. 549-555
- ISSN:
- 0013-9351
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; argon (noble gases); carbon; catalytic activity; cathodes; chromium; corrosion; cost effectiveness; desalination; durability; electrochemistry; electrolysis; ferric oxide; hydrogen; ions; iron; magnetite; manganese; mechanical properties; oil and gas industry; oxygen; platinum; saline water; scanning electron microscopes; scanning electron microscopy; seawater; sodium; sodium chloride; stainless steel; surface area; temperature; toxicity
- Abstract:
- ... For water electrolysis, a rare earth material (eg., platinum) is often used as an electrode, but because of the high cost and toxicity of chemicals, researchers are searching for cost effective and eco-friendly alternative materials. Various alloys and metals have been long explored for use as electrode materials in different media. Stainless steel (SS 304) electrodes are cost effective and have a ...
- DOI:
- 10.1016/j.envres.2019.03.069
- https://doi.org/10.1016/j.envres.2019.03.069
- Author:
- Lanling Zhao; Jun Wang; Zhigang Gai; Jichao Li; Jian Liu; Jiyang Wang; Chunlei Wang; Xiaolin Wang
- Source:
- RSC advances 2019 v.9 no.15 pp. 8364-8368
- ISSN:
- 2046-2069
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; annealing; ceramics; density functional theory; dielectric permittivity; dielectric properties; oxygen; titanium dioxide
- Abstract:
- ... Density functional theory calculations were conducted to investigate the electronic structures of rutile Ti₁₆O₃₂, Ti₁₃Nb₂InO₃₂, and Ti₁₃Nb₂InO₃₁ systems. High density (Nb + In) co-doped rutile TiO₂ ceramics were successfully prepared by one modified solid state method. XRD, XPS, Raman scattering and FT-IR measurements were performed to investigate the structural properties of the (Nb + In) co-dope ...
- DOI:
- 10.1039/c9ra00564a
- https://doi.org/10.1039/c9ra00564a
- Author:
- Bing Yang; Biao Yu; Haining Li; Nan Huang; Lusheng Liu; Xin Jiang
- Source:
- Carbon 2020 v.156 pp. 242-252
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; annealing; emissions factor; hydrogen; light traps; models; nanocrystals; nanodiamonds; oxidation; oxygen; photoluminescence; silicon; temperature; transmission electron microscopy
- Abstract:
- ... Silicon vacancy (SiV) centers in CVD-deposited nanodiamond particles or films always exhibit a photoluminescent (PL)-quenching behavior. Herein, in order to overcome this issue, air annealing of nanocrystalline diamond (NCD) films with uniform doping of Si atoms is employed to improve the PL emission efficiency of SiV centers. Without severe mass loss in diamond, SiV centers exhibit an increased P ...
- DOI:
- 10.1016/j.carbon.2019.09.054
- https://doi.org/10.1016/j.carbon.2019.09.054
- Author:
- Qian Li; Huazhang Wei; Huayi Li; Yin Zhang; Youliang Hu
- Source:
- Colloids and surfaces 2019 v.579 pp. 123628
- ISSN:
- 0927-7757
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; carbon; carbonization; chlorine; hydrochloric acid; microstructure; nitrogen; oxygen; poly(vinyl chloride); polyethylene; polypropylenes; scanning electron microscopy; surface area; transmission electron microscopy
- Abstract:
- ... Chlorinated polypropylene(CPP), chlorinated polyethylene(CPE) and chlorinated polyvinyl chloride(CPVC) with high chlorine content were used to prepare porous carbons under inert gas and air atmosphere, respectively. Due to their flame retardance, carbon materials were both prepared from two atmosphere through thermal dehydrochlorination. The microstructure and porous textures of the obtained carbo ...
- DOI:
- 10.1016/j.colsurfa.2019.123628
- https://doi.org/10.1016/j.colsurfa.2019.123628
- Author:
- Antoine Venault; Ching-Hsueh Chiang; Hsiang-Yu Chang; Wei-Song Hung; Yung Chang
- Source:
- Journal of membrane science 2018 v.565 pp. 131-144
- ISSN:
- 0376-7388
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; artificial membranes; contact angle; emulsions; fluorides; graphene oxide; hexane; liquids; microfiltration; scanning electron microscopy; separation; soybean oil; toluene; wettability
- Abstract:
- ... In what follows, we incorporated graphene oxide (GO) into poly(vinylidene fluoride) (PVDF) membranes prepared by vapor-induced phase separation (VIPS), in order to achieve gravity-driven separation of versatile water-in-oil (W/O) and oil-in-water (O/W) emulsions. Membranes were first fully characterize to evidence the presence of GO at the interface, using XPS, FT-IR, Raman, and XRD spectroscopy, ...
- DOI:
- 10.1016/j.memsci.2018.08.018
- https://doi.org/10.1016/j.memsci.2018.08.018
- Author:
- Andrea Arcifa; Antonella Rossi; Shivaprakash N. Ramakrishna; Rosa Espinosa-Marzal; Alexis Sheehan; Nicholas D. Spencer
- Source:
- Journal of physical chemistry 2018 v.122 no.13 pp. 7331-7343
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; adhesion; air; energy; friction; hydrophobicity; ionic liquids; light microscopy; lubrication; physical chemistry; plastic deformation; silica; silicon; welding
- Abstract:
- ... This work aims to elucidate the role of water on the tribological behavior of silicon-based surfaces lubricated with a hydrophobic ionic liquid (IL), by means of a multitechnique, multiscale approach. At the nanoscale, the presence of water at the interface was found to promote adhesion between a sharp silicon tip and a silicon substrate, when submerged in the IL. In line with this finding, in the ...
- DOI:
- 10.1021/acs.jpcc.8b01671
- https://doi.org/10.1021/acs.jpcc.8b01671
- Author:
- Youngho Eom; Sung Min Son; Yea Eun Kim; Jung-Eun Lee; Sang-Ha Hwang; Han Gi Chae
- Source:
- Carbon 2019 v.150 pp. 142-152
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; carbonization; cellulose; graphene; homogenization; microstructure; nanocrystals; temperature; transmission electron microscopy
- Abstract:
- ... The microstructural evolution of highly ordered graphite during high temperature carbonization of cellulose nanocrystals (CNC) was traced in the temperature range of 1000–2500 °C. It was interesting to note that the direct carbonization of CNC under inert environment led to an irregular morphology due to molecular fusion whereas oxidative stabilization at 250 °C under air and subsequent carbonizat ...
- DOI:
- 10.1016/j.carbon.2019.05.007
- https://doi.org/10.1016/j.carbon.2019.05.007
- Author:
- Markus Gehring; Hermann Tempel; Alexandre Merlen; Roland Schierholz; Rüdiger-A. Eichel; Hans Kungl
- Source:
- RSC advances 2019 v.9 no.47 pp. 27231-27241
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; batteries; carbon fibers; carbonization; chemical reduction; electrical conductivity; electrochemistry; electrodes; elemental composition; nitrogen; oxygen; potassium hydroxide; scanning electron microscopy; temperature
- Abstract:
- ... Poly-acrylonitrile (PAN)-derived carbon fibres were characterised as air electrode frameworks for aqueous-alkaline metal–air batteries, focussing on the influence of the carbonisation temperature on the structure and electrochemical properties. Elemental composition, (atomic) structure, electrical conductivity, and electrochemical performance related to the oxygen reduction were investigated for e ...
- DOI:
- 10.1039/c9ra03805a
- https://doi.org/10.1039/c9ra03805a
- Author:
- Ishak Ramzi; Laroche Gaétan; Lamonier Jean-François; Ziegler Donald P.; Alamdari Houshang
- Source:
- ACS sustainable chemistry 2017 v.5 no.8 pp. 6700-6706
- ISSN:
- 2168-0485
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; aluminum oxide; anodes; boron; carbon; electrolysis; mass spectrometry; oxidation; oxygen; temperature; thermogravimetry
- Abstract:
- ... Several chemical reactions occur during the electrolysis of alumina in the Hall–Héroult process resulting in a significant overconsumption of the carbon anode. Carbon oxidation with oxygen is one of these reactions. The inhibition of this reaction by the application of protective layers on the anode can be an effective technique to reduce carbon consumption. Boron impregnation was shown to suppre ...
- DOI:
- 10.1021/acssuschemeng.7b00945
- https://doi.org/10.1021/acssuschemeng.7b00945
- Author:
- Andreas Johansson; Hung-Chieh Tsai; Jukka Aumanen; Juha Koivistoinen; Pasi Myllyperkiö; Yi-Zhe Hung; Min-Chiang Chuang; Chia-Hao Chen; Wei Yen Woon; Mika Pettersson
- Source:
- Carbon 2017 v.115 pp. 77-82
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; chemical composition; graphene; graphene oxide; image analysis; irradiation; mixing; oxidation
- Abstract:
- ... Chemical composition of two-photon oxidized single-layer graphene is studied by micrometer X-ray photoelectron spectroscopy (XPS). Oxidized areas with a size of 2 × 2 μm2 are patterned on graphene by tightly focused femtosecond pulsed irradiation under air atmosphere. The degree of oxidation is controlled by varying the irradiation time. The samples are characterized by four wave mixing (FWM) imag ...
- DOI:
- 10.1016/j.carbon.2016.12.091
- https://doi.org/10.1016/j.carbon.2016.12.091
- Author:
- Sangik Lee; Chansoo Yoon; Ji Hye Lee; Yeon Soo Kim; Mi Jung Lee; Wondong Kim; Jaeyoon Baik; Quanxi Jia; Bae Ho Park
- Source:
- ACS applied materials & interfaces 2018 v.10 no.22 pp. 18895-18901
- ISSN:
- 1944-8252
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; aluminum; aluminum oxide; argon (noble gases); atomic force microscopy; corrosion; encapsulation; nitrogen; oxidation; phosphorus; screening; transistors
- Abstract:
- ... Two-dimensional (2D)-layered semiconducting materials with considerable band gaps are emerging as a new class of materials applicable to next-generation devices. Particularly, black phosphorus (BP) is considered to be very promising for next-generation 2D electrical and optical devices because of its high carrier mobility of 200–1000 cm² V–¹ s–¹ and large on/off ratio of 10⁴ to 10⁵ in field-effect ...
- DOI:
- 10.1021/acsami.8b04700
- https://doi.org/10.1021/acsami.8b04700
- Author:
- Nazrul Islam; Anjum Dihingia; Prasenjit Manna; Tonkeswar Das; Jatin Kalita; H.P. Dekaboruah; Binoy K. Saikia
- Source:
- Science of the total environment 2019 v.679 pp. 209-220
- ISSN:
- 0048-9697
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aerosols; air; air pollution; anthropogenic activities; biomass; burning; carbon; cytotoxicity; feasibility studies; fluorescence emission spectroscopy; genotoxicity; high-value products; human health; image analysis; moieties; nanodiamonds; oxygen; particulate emissions; particulates; pollution control; toxicity testing; transmission electron microscopy; ultraviolet-visible spectroscopy; value added; zeta potential
- Abstract:
- ... Carbonaceous aerosols (CAs) are ubiquitous and among the most significant environmental materials found in ambient air, mainly derived from anthropogenic sources (biomass burning, industrial activity, vehicle emissions, etc.). Elemental carbon (black carbon) and organic carbons are the major constituents of CAs. Due to their toxic effects, they are considered as high-risk compounds for human healt ...
- DOI:
- 10.1016/j.scitotenv.2019.04.446
- https://doi.org/10.1016/j.scitotenv.2019.04.446
- Author:
- Jie Miao; Haoliang Li; Hanxun Qiu; Xian Wu; Junhe Yang
- Source:
- Journal of materials science 2018 v.53 no.12 pp. 8855-8865
- ISSN:
- 0022-2461
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; films (materials); graphene; graphene oxide; heat; polymerization; polymers; scanning electron microscopy; thermal conductivity
- Abstract:
- ... Heat dissipation in time is essential for long-term reliability of electrical devices. Graphene, with superior thermal conductivity and excellent flexibility, exhibits a potential to substitute currently used graphite film for thermal management. In this work, a free-standing film with enhanced thermal conductivity and better flexibility was achieved by a facile and environmentally friendly in sit ...
- DOI:
- 10.1007/s10853-018-2112-z
- https://doi.org/10.1007/s10853-018-2112-z
23. Investigation of effect of doping concentration in Nb-doped TiO2 thin films for TCO applications
- Author:
- Satyavir Singh; Vikas Sharma; Kanupriya Sachdev
- Source:
- Journal of materials science 2017 v.52 no.19 pp. 11580-11591
- ISSN:
- 0022-2461
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; ambient temperature; annealing; atomic force microscopy; coatings; crystallization; electrical resistance; electrodes; infrared spectroscopy; oxygen; scanning electron microscopy; thermogravimetry; titanium dioxide; topography; transmission electron microscopes; transmittance
- Abstract:
- ... Nb-doped TiO₂ (referred hereafter as NTO) thin films were deposited by sol–gel spin coating method to investigate their use as transparent conducting electrode (TCE). A range of Nb ₓ Ti₁₋ₓ O₂ (x = 0, 0.003, 0.005, 0.008, 0.01, 0.015, 0.02) compositions were synthesized and deposited as thin films via spin coating. The films were deposited at room temperature and showed crystallization on annealing ...
- DOI:
- 10.1007/s10853-017-1328-7
- https://doi.org/10.1007/s10853-017-1328-7
- Author:
- Clemens Kunz; Tobias N. Büttner; Björn Naumann; Anne V. Boehm; Enrico Gnecco; Jörn Bonse; Christof Neumann; Andrey Turchanin; Frank A. Müller; Stephan Gräf
- Source:
- Carbon 2018 v.133 pp. 176-185
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; atomic force microscopy; carbon; carbon fibers; irradiation; nanomaterials; polymers; scanning electron microscopy; wavelengths
- Abstract:
- ... The formation and properties of laser-induced periodic surface structures (LIPSS) were investigated on carbon fibers under irradiation of fs-laser pulses characterized by a pulse duration τ = 300 fs and a laser wavelength λ = 1025 nm. The LIPSS were fabricated in an air environment at normal incidence with different values of the laser peak fluence and number of pulses per spot. The morphology of ...
- DOI:
- 10.1016/j.carbon.2018.03.035
- https://doi.org/10.1016/j.carbon.2018.03.035
- Author:
- Germain Robert Bigras; Xavier Glad; Leron Vandsburger; Carl Charpin; Pierre Levesque; Richard Martel; Luc Stafford
- Source:
- Carbon 2019 v.144 pp. 532-539
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; copper; cupric oxide; electromagnetic field; graphene; hydrocarbons; nitrogen; vapors
- Abstract:
- ... Graphene films grown on copper by chemical vapor deposition were exposed to the late afterglow of a reduced-pressure N₂ plasma sustained by microwave electromagnetic fields. X-ray photoelectron and Raman spectroscopies reveal extremely high incorporation of plasma-generated N atoms into the graphene film (N/C = 29%) while maintaining an unprecedentedly low-damage generation (D:G = 0.35–0.45) compa ...
- DOI:
- 10.1016/j.carbon.2018.12.095
- https://doi.org/10.1016/j.carbon.2018.12.095
- Author:
- Yongli Zhang; Yanbo Zhou; Qingyu Wang; Junjun Shi; Chao Peng; Lingfeng He; Liang Shi
- Source:
- RSC advances 2018 v.8 no.1 pp. 547-556
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; catalysts; catalytic activity; chemical oxygen demand; copper; cupric oxide; decolorization; durability; hydrogen; iron; iron oxides; nitrogen; oxidation; platinum; scanning electron microscopy; temperature; transmission electron microscopy; wastewater
- Abstract:
- ... A series of novel Pt-modified Cu–Fe–La/γ-Al₂O₃ catalysts were prepared by an incipient-wetness impregnation method, and their performances were evaluated in catalytic wet air oxidation (CWAO) of printing and dyeing wastewater (PDW). The as-prepared catalysts were characterized by X-ray photoelectron spectroscopy (XPS), nitrogen adsorption–desorption, X-ray diffraction (XRD), field emission scannin ...
- DOI:
- 10.1039/c7ra11899f
- https://doi.org/10.1039/c7ra11899f
- Author:
- Yash Boyjoo; Guillaume Rochard; Jean-Marc Giraudon; Jian Liu; Jean-François Lamonier
- Source:
- Sustainable materials and technologies 2018 pp. e00091
- ISSN:
- 2214-9937
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; air; catalysts; coatings; formaldehyde; manganese; manganese dioxide; nanospheres; nitrates; oxidation; oxygen; porosity; porous media; potassium permanganate; silica; sodium hydroxide; transmission electron microscopy
- Abstract:
- ... In this work, hollow MnO2 spheres were synthesized via a sacrificial templating method using SiO2 nanospheres as hard templates. The MnO2 coating on SiO2 was achieved by a newly devised low-temperature, controlled precipitation by redox (CPR) method which is based on the controlled redox reaction between KMnO4 and Mn(NO3)2 at 30 °C. After calcination of the SiO2@MnO2 core shell spheres at 300 °C, ...
- DOI:
- 10.1016/j.susmat.2018.e00091
- https://doi.org/10.1016/j.susmat.2018.e00091
28. Redox and Catalytic Properties of Promoted NiO Catalysts for the Oxidative Dehydrogenation of Ethane
- Author:
- Delgado D.; Solsona B.; Ykrelef A.; Rodríguez-Gómez A.; Caballero A.; Rodríguez-Aguado E.; Rodríguez-Castellón E.; López Nieto J. M.
- Source:
- The Journal of Physical Chemistry C 2017 v.121 no.45 pp. 25132-25142
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; catalysts; catalytic activity; dehydrogenation; ethane; ethylene; nickel oxide; oxygen; physical chemistry; tin; transmission electron microscopy
- Abstract:
- ... NiO and metal-promoted NiO catalysts (M-NiO, with a M/(M+Ni) atomic ratio of 0.08, with M = Nb, Sn, or La) have been prepared, tested in the oxidative dehydrogenation (ODH) of ethane, and characterized by means of XRD, TPR, HRTEM, Raman, XPS, and in situ XAS (using H₂/He, air or C₂H₆/He mixtures). The selectivity to ethylene during the ODH of ethane decreases according to the following trend: Nb–N ...
- DOI:
- 10.1021/acs.jpcc.7b07066
- https://doi.org/10.1021/acs.jpcc.7b07066
- Author:
- Dapeng Xu; Shuohui Gao; Wenqiang Liu; Ying Liu; Qiang Zhou; Liang Li; Tian Cui; Hongming Yuan
- Source:
- RSC advances 2019 v.9 no.2 pp. 839-843
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; ambient temperature; crystals
- Abstract:
- ... Single crystals of the trirutile structure MgTa₂O₆ were grown via an optical floating zone method in an air atmosphere. The as-grown crystals were pale yellow and transparent and the natural cleavage plane formed during the crystal growth was determined by XRD2 to be along the c-axis direction. The variations in valence were investigated by XPS (X-ray photoelectron spectroscopy). The room-temperat ...
- DOI:
- 10.1039/c8ra06113k
- https://doi.org/10.1039/c8ra06113k
- Author:
- R. I. Tomov; T. B. Mitchel-Williams; R. Maher; G. Kerherve; L. Cohen; D. J. Payne; R. V. Kumar; B. A. Glowacki
- Source:
- Journal of materials chemistry 2018 v.6 no.12 pp. 5071-5081
- ISSN:
- 2050-7496
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; cathodes; cobalt oxide; electrochemistry; microstructure; nanoparticles; nitrates; synergism; temperature
- Abstract:
- ... La₀.₆Sr₀.₄Co₀.₂Fe₀.₈O₃₋δ/Ce₀.₉Gd₀.₁O₁.₉ composite cathodes were nano-engineered via “dual” inkjet printing infiltration of nitrate salt solutions in a single step procedure. After calcination in air at 700 °C the cathodes were decorated with Ce₀.₉Gd₀.₁O₁.₉ and CoₓOy nanoparticles (∼20 nm in size). The effects of the as-created nano-decoration on the electrochemical activity and the performance sta ...
- DOI:
- 10.1039/c7ta10990c
- https://doi.org/10.1039/c7ta10990c
- Author:
- Junguang Meng; Xiaobo Wang; Zengli Zhao; Xianshuang Wu; Anqing Zheng; Guoqiang Wei; Zhen Huang; Haibin Li
- Source:
- RSC advances 2017 v.7 no.62 pp. 39160-39171
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; biomass; carbon; catalysts; catalytic activity; iron; magnesium; models; nickel; olivine; scanning electron microscopy; steam; surface area; temperature; toluene
- Abstract:
- ... Olivine has been shown to have a good catalytic effect on biomass tar, however, carbon deposition is still one of the adverse conditions that affect its activity. A highly carbon-resistant olivine-supported metallic nickel catalyst, which was synthesized using thermal fusion (TF), was tested in a fixed bed reactor for tar removal. Toluene was selected as a tar destruction model molecule. The curre ...
- DOI:
- 10.1039/c7ra06219b
- https://doi.org/10.1039/c7ra06219b
- Author:
- Ryota Sakamoto; Ryo Shiotsuki; Keisuke Wada; Naoya Fukui; Hiroaki Maeda; Joe Komeda; Ryosuke Sekine; Koji Harano; Hiroshi Nishihara
- Source:
- Journal of materials chemistry A 2018 v.6 no.44 pp. 22189-22194
- ISSN:
- 2050-7496
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; adsorption; air; atomic force microscopy; carbon; electrochemistry; electrodes; hydrogen; hydrogen production; light microscopy; liquids; micropores; moieties; nanosheets; nitrogen; polymerization; porosity; pyrazines; sodium bicarbonate; sodium carbonate; sulfuric acid; surface area; thermal stability; transmission electron microscopy
- Abstract:
- ... A graphdiyne (GDY) analogue that features pyrazine as the aromatic core (PR-GDY) was synthesized under air using a liquid/liquid interfacial synthesis. Optical microscopy, SEM, and AFM revealed the sheet morphology of PR-GDY with a typical thickness of 20 nm in AFM, while TEM disclosed its amorphous nature. It served as a metal-free electrocatalyst for the hydrogen evolution reaction (HER) from wa ...
- DOI:
- 10.1039/c8ta07347c
- https://doi.org/10.1039/c8ta07347c
- Author:
- Chengyun Huang; Zhen Ma; Changxi Miao; Yinghong Yue; Weiming Hua; Zi Gao
- Source:
- RSC advances 2017 v.7 no.8 pp. 4243-4252
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; air; aluminum oxide; catalysts; catalytic activity; energy-dispersive X-ray analysis; nitrates; nitrogen; nitrous oxide; oxygen; particle size; powders; temperature; transmission electron microscopy; zinc; zinc oxide
- Abstract:
- ... Zn–Al₂O₃ supports were prepared by impregnating commercial γ-Al₂O₃ powders with different amounts of Zn(NO₃)₂, followed by calcination in air at 500 or 800 °C. Rh/Zn–Al₂O₃ catalysts were then prepared by impregnating Zn–Al₂O₃ supports with Rh(NO₃)₃ followed by calcination in air at 500 °C. The catalysts and/or supports were characterized by ICP-OES, XRD, N₂ adsorption, Raman spectroscopy, TEM-EDX, ...
- DOI:
- 10.1039/c6ra25388a
- https://doi.org/10.1039/c6ra25388a
- Author:
- Shuai Wang; Liping Wu; Xun Hu; Lei Zhang; Tingting Li; Shengjuan Jiang; Kane M. O’Donnell; Craig E. Buckley; Chun-Zhu Li
- Source:
- Energy & fuels 2018 v.32 no.12 pp. 12545-12553
- ISSN:
- 1520-5029
- Subject:
- Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; absorption; air; aromatic compounds; biochar; crosslinking; fuels; gasification; oxidation; oxygen; thermogravimetry; wood
- Abstract:
- ... Structural changes in partially gasified char during low-temperature gasification in air were investigated using Fourier transform infrared/Raman and X-ray photoelectron spectroscopies. Two kinds of chars prepared from the gasification of mallee wood in 15% H₂O–Ar at 600 and 900 °C were gasified in air at 375 °C in a thermogravimetric analyzer, separately. The breakage of large aromatic ring syste ...
- DOI:
- 10.1021/acs.energyfuels.8b02870
- https://doi.org/10.1021/acs.energyfuels.8b02870
- Author:
- Szu-Hsuan Lee; Vardan Galstyan; Andrea Ponzoni; Isabel Gonzalo-Juan; Ralf Riedel; Marie-Anne Dourges; Yohann Nicolas; Thierry Toupance
- Source:
- ACS applied materials & interfaces 2018 v.10 no.12 pp. 10173-10184
- ISSN:
- 1944-8252
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; acetone; air; carbon monoxide; cations; chemical composition; crystal structure; crystallites; energy; ethanol; hot water treatment; hydrogen; liquids; metal ions; nanoparticles; nitrogen; nitrogen dioxide; pH; porosimetry; potassium; sorption; surface area; temperature; tin dioxide; transmission electron microscopy; volatile organic compounds
- Abstract:
- ... Tin dioxide (SnO₂) nanoparticles were straightforwardly synthesized using an easily scaled-up liquid route that involves the hydrothermal treatment, either under acidic or basic conditions, of a commercial tin dioxide particle suspension including potassium counterions. After further thermal post-treatment, the nanomaterials have been thoroughly characterized by Fourier transform infrared and Rama ...
- DOI:
- 10.1021/acsami.7b18140
- https://doi.org/10.1021/acsami.7b18140
- Author:
- Xuying Zhong; Weichang Zhou; Yong Zhou; Fang Zhou; Chang Liu; Yanling Yin; Yuehua Peng; Dongsheng Tang
- Source:
- RSC advances 2016 v.6 no.65 pp. 60862-60868
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; crystals; electronics; gallium; lighting; photonics; red light; scanning electron microscopy; selenium; semiconductors; sulfur; tellurium; transmission electron microscopy; vapors
- Abstract:
- ... Layered two-dimensional (2D) gallium monochalcogenide (GaX, X = S, Se, Te) semiconductor crystals hold great promise for potential electronics and photonics application. In this paper, we reported the optoelectronic properties of 2D bandgap engineered GaSe₀.₅Te₀.₅ nanoflakes. The GaSe₀.₅Te₀.₅ nanoflakes were synthesized by chemical vapor deposition (CVD) and characterized by XRD, SEM, TEM, XPS, Ra ...
- DOI:
- 10.1039/c6ra09239j
- https://doi.org/10.1039/c6ra09239j
- Author:
- Asma Sharafi; Seungho Yu; Michael Naguib; Marcus Lee; Cheng Ma; Harry M. Meyer; Jagjit Nanda; Maiofang Chi; Donald J. Siegel; Jeff Sakamoto
- Source:
- Journal of materials chemistry A 2017 v.5 no.26 pp. 13475-13487
- ISSN:
- 2050-7496
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; air pollution; anodes; dielectric spectroscopy; electrolytes; exposure duration; protonation; relative humidity; scanning electron microscopy; transmission electron microscopy
- Abstract:
- ... Li₇La₃Zr₂O₁₂ (LLZO) is a promising solid-state electrolyte that could enable solid-state-batteries (SSB) employing metallic Li anodes. For a SSB to be viable, the stability and charge transfer kinetics at the Li–LLZO interface should foster facile plating and stripping of Li. Contrary to these goals, recent studies have reported high Li–LLZO interfacial resistance which was attributed to a contami ...
- DOI:
- 10.1039/c7ta03162a
- https://doi.org/10.1039/c7ta03162a
- Author:
- Pappacena Alfonsina; Rancan Marzio; Armelao Lidia; Llorca Jordi; Ge Wenna; Ye Bangjiao; Lucotti Andrea; Trovarelli Alessandro; Boaro Marta
- Source:
- The Journal of Physical Chemistry C 2017 v.121 no.33 pp. 17746-17755
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; electrons; hydrogen production; nitrogen; oxides; oxygen; physical chemistry; solid solutions; temperature; transmission electron microscopy
- Abstract:
- ... The reactivity of a ceria-rich Ce₀.₈₅Zr₀.₁₅O₂ solid solution toward the thermochemical water splitting process (TWS) was studied over repeated H₂/H₂O redox cycles. The structural and surface modifications after treatment at high temperature under air or N₂ atmospheres were characterized by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray ...
- DOI:
- 10.1021/acs.jpcc.7b06043
- https://doi.org/10.1021/acs.jpcc.7b06043
- Author:
- Liu Shuai; He Fang; Huang Zhen; Zheng Anqing; Feng Yipeng; Shen Yang; li Haibin; Wu Hao; Glarborg Peter
- Source:
- Energy & Fuels 2016 v.30 no.5 pp. 4251-4262
- ISSN:
- 1520-5029
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; biomass; carbon dioxide; coprecipitation; ferrimagnetic materials; hydrogen; hydrogen production; nanoparticles; nickel; nitrogen; oxidation; oxygen; porosity; pyrolysis; scanning electron microscopy; screening; silica; sol-gel processing; steam; surface area
- Abstract:
- ... The objective of this paper is to systematically investigate the influences of different preparation methods on the properties of NiFe₂O₄ nanoparticles as oxygen carrier in chemical looping hydrogen production (CLH). The solid state (SS), coprecipitation (CP), hydrothermal (HT), and sol–gel (SG) methods were used to prepare NiFe₂O₄ oxygen carriers. Samples were characterized by X-ray diffraction ( ...
- DOI:
- 10.1021/acs.energyfuels.6b00284
- https://doi.org/10.1021/acs.energyfuels.6b00284
- Author:
- Jörgen Metsik; Martin Timusk; Tanel Käämbre; Hugo Mändar; Madis Umalas; Agnes Kuus; Laurits Puust; Kathriin Utt; Ilmo Sildos; Uno Mäeorg
- Source:
- Polymer degradation and stability 2016 v.126 pp. 170-178
- ISSN:
- 0141-3910
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; absorbance; air; ambient temperature; argon (noble gases); chemical composition; polymerization; polymers; ultraviolet radiation; water vapor
- Abstract:
- ... Sufficient stability of conductive polymers is crucial for allowing widespread application of these materials. Poly(3,4-ethylenedioxythiophene) (PEDOT) has a relatively high conductivity and transparency among conductive polymers. In this study, the stability of PEDOT thin films prepared by vapor phase polymerization was investigated at elevated temperatures in air (100–140 °C) and in argon (140 ° ...
- DOI:
- 10.1016/j.polymdegradstab.2016.02.008
- https://doi.org/10.1016/j.polymdegradstab.2016.02.008
- Author:
- Elizaveta A. Derevyannikova; Tatyana Yu Kardash; Andrey I. Stadnichenko; Olga A. Stonkus; Elena M. Slavinskaya; Valery A. Svetlichnyi; Andrei I. Boronin
- Source:
- Journal of physical chemistry 2018 v.123 no.2 pp. 1320-1334
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; coprecipitation; ions; models; nanocomposites; platinum; transmission electron microscopy
- Abstract:
- ... Pt–CeO₂ nanocomposites were obtained by coprecipitation, varying the Pt loading over a wide range of 1–30 wt %. The samples were calcined in air at 450–1000 °C. The Pt–CeO₂ nanocomposites were investigated by a set of structural (X-ray diffraction, extended X-ray absorption fine structure (EXAFS), pair distribution function (PDF), and transmission electron microscopy) and spectroscopic (X-ray phot ...
- DOI:
- 10.1021/acs.jpcc.8b11009
- https://doi.org/10.1021/acs.jpcc.8b11009
- Author:
- Aurora Piazza; Filippo Giannazzo; Gianpiero Buscarino; Gabriele Fisichella; Antonino La Magna; Fabrizio Roccaforte; Marco Cannas; Franco Mario Gelardi; Bruno Pignataro; Michelangelo Scopelliti; Simonpietro Agnello
- Source:
- Carbon 2016 v.107 pp. 696-704
- ISSN:
- 0008-6223
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; aluminum oxide; atomic force microscopy; carbon dioxide; graphene; heat treatment; nitrogen; oxygen; silica; silicon
- Abstract:
- ... The mechanisms responsible for p-type doping of substrate supported monolayer graphene (Gr) by thermal treatments in oxygen ambient have been investigated by micro-Raman spectroscopy, atomic force microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS), considering commonly employed dielectric substrates, such as SiO2 and Al2O3 thin films grown on Si. While a high p-type doping (∼1013 cm−2) is ...
- DOI:
- 10.1016/j.carbon.2016.06.077
- https://doi.org/10.1016/j.carbon.2016.06.077
- Author:
- Yanmin Wang; Chaoying Yu; Xu Meng; Peiqing Zhao; Lingjun Chou
- Source:
- RSC advances 2017 v.7 no.63 pp. 39796-39802
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; butyric acid; catalysts; catalytic activity; ceric oxide; cerium; chemical oxygen demand; ethanol; nitrogen; oxidation; oxygen; particle size; ruthenium; surface area; transmission electron microscopy
- Abstract:
- ... Two kinds of nano-CeO₂-supported low loading Ru catalysts were prepared by ultrasonic-assisted incipient wetness impregnation method and their applications in catalytic wet air oxidation (CWAO) of butyric acid (BA) were investigated. Both of the catalysts were characterized by XRD, XPS, TEM, N₂ adsorption–desorption, Raman and H₂-TPR. According to the characterization results, compared to Ru/CeO₂ ...
- DOI:
- 10.1039/c7ra06028a
- https://doi.org/10.1039/c7ra06028a
- Author:
- Ji Min Kim; Ji Hoon Kim; Chang Yeon Lee; Dong Wook Jerng; Ho Seon Ahn
- Source:
- Journal of hazardous materials 2018 v.344 pp. 458-465
- ISSN:
- 0304-3894
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; absorbents; acetaldehyde; adsorbents; adsorption; air; chemical composition; filters; graphene; heat treatment; humans; microwave radiation; potassium hydroxide; scanning electron microscopy; surface area; toluene; volatile organic compounds
- Abstract:
- ... Volatile organic compound (VOC) gases can cause harm to the human body with exposure over the long term even at very low concentrations (ppmv levels); thus, effective absorbents for VOC gas removal are an important issue. In this study, accordingly, graphene-based adsorbents with microsized pores were used as adsorbents to remove toluene and acetaldehyde gases at low concentrations (30ppm). Suffic ...
- DOI:
- 10.1016/j.jhazmat.2017.10.038
- https://doi.org/10.1016/j.jhazmat.2017.10.038
- Author:
- Amare Aregahegn Dubale; Andebet Gedamu Tamirat; Hung-Ming Chen; Taame Abraha Berhe; Chun-Jern Pan; Wei-Nien Su; Bing-Joe Hwang
- Source:
- Journal of materials chemistry A 2016 v.4 no.6 pp. 2205-2216
- ISSN:
- 2050-7496
- Subject:
- Raman spectroscopy; X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; absorption; adsorption; air; annealing; cathodes; copper; electric current; electrons; energy conversion; hydrogen production; lighting; synergism
- Abstract:
- ... A Cu₂O/CuO heterostructure modified with CuS is proposed as a highly promising and stable photocathode for solar hydrogen production. The Cu₂O/CuO/CuS heterostructure was synthesized by in situ growth of Cu₂O/CuO via simple electrodeposition of Cu film followed by annealing in air, and then the surfaces of the heterostructure were sequentially modified by loading CuS via a successive ion layer ads ...
- DOI:
- 10.1039/c5ta09464j
- https://doi.org/10.1039/c5ta09464j
- Author:
- Challagulla Swapna; Nagarjuna Ravikiran; Ganesan Ramakrishnan; Roy Sounak
- Source:
- ACS sustainable chemistry 2016 v.4 no.3 pp. 974-982
- ISSN:
- 2168-0485
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; ammonium oxalate; catalysts; chromium; ethanol; iron oxides; nitrogen; oxalic acid; potassium; reflectance spectroscopy; scanning electron microscopy; surface area; titanium dioxide
- Abstract:
- ... TiO₂ synthesized by polymerizable sol–gel approach is used to demonstrate the photoreduction of Cr(VI) in aqueous medium. Fe₃O₄ is chosen as the magnetically recoverable support, onto which, 10, 20, 30 and 50% of TiO₂ have been dispersed following the polymerizable sol–gel approach. The synthesized materials are characterized using XRD, SEM, XPS, Raman spectroscopy, diffuse reflectance spectroscop ...
- DOI:
- 10.1021/acssuschemeng.5b01055
- https://doi.org/10.1021/acssuschemeng.5b01055
- Author:
- M. Kamruzzaman; L. Chaoping; F. Yishu; A. K. M. Farid Ul Islam; J. A. Zapien
- Source:
- RSC advances 2016 v.6 no.101 pp. 99282-99290
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; annealing; density functional theory; evaporation; glass; optical properties; scanning electron microscopy; solar cells; sulfides; temperature; transmission electron microscopy; ultraviolet-visible spectroscopy
- Abstract:
- ... We investigate the low-cost, earth-abundant and air-stable inorganic absorber Sb₂S₃ that can be processed in the air for organic–inorganic hybrid solar cell applications. To this end, we deposited thin layers of Sb₂S₃ with thicknesses of 45.0 ± 5, 60.0 ± 7, 80.0 ± 8, 100.0 ± 10 and 120 ± 24 nm by a thermal evaporation method. The absorber Sb₂S₃ and the hole transporting layer P3HT were annealed un ...
- DOI:
- 10.1039/c6ra20378g
- https://doi.org/10.1039/c6ra20378g
- Author:
- Al-Nafiey Amer; Sieber Brigitte; Gelloz Bernard; Addad Ahmed; Moreau Myriam; Barjon Julien; Girleanu Maria; Ersen Ovidiu; Boukherroub Rabah
- Source:
- The Journal of Physical Chemistry C 2016 v.120 no.8 pp. 4571-4580
- ISSN:
- 1932-7455
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; annealing; light intensity; luminescence; nanopores; nanorods; optical properties; physical chemistry; temperature; water vapor; zinc; zinc oxide
- Abstract:
- ... Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260 °C in air and under high pressure water vapor (HWA) at 1.3–3.9 MPa. We found that the UV luminescence intensity increased by a factor of 2–3 after HWA annealing compared to that observed after annealing in air. Structural analysis of the nanorods in relation with their optical properties by me ...
- DOI:
- 10.1021/acs.jpcc.5b09201
- https://doi.org/10.1021/acs.jpcc.5b09201
- Author:
- Virginia Gomez; Silvia Irusta; Olawale B. Lawal; Wade Adams; Robert H. Hauge; Charles W. Dunnill; Andrew R. Barron
- Source:
- RSC advances 2016 v.6 no.14 pp. 11895-11902
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; carbon; carbon nanotubes; catalysts; chlorination; chlorine; cleaning; differential thermal analysis; energy-dispersive X-ray analysis; iron; microwave treatment; oxidation; purification methods; scanning electron microscopy; thermogravimetry; transmission electron microscopy
- Abstract:
- ... A new two-step purification method of carbon nanotubes (CNTs) involving a microwave treatment followed by a gas-phase chlorination process is reported. The significant advantage of this method over conventional cleaning carbon nanotubes procedures is that under microwave treatment in air, the carbon shells that encase the residual metal catalyst particles are removed and the metallic iron is expos ...
- DOI:
- 10.1039/c5ra24854j
- https://doi.org/10.1039/c5ra24854j
- Author:
- Bartali Ruben; Lamberti Andrea; Bianco Stefano; Pirri Candido F.; Tripathi Manoj; Gottardi Gloria; Speranza Giorgio; Iacob Erica; Pugno Nicola; Laidani Nadhira
- Source:
- Langmuir 2017 v.33 no.45 pp. 12865-12872
- ISSN:
- 1520-5827
- Subject:
- Raman spectroscopy; X-ray photoelectron spectroscopy; air; atomic force microscopy; bubbles; contact angle; energy; graphene; polydimethylsiloxane; wettability
- Abstract:
- ... The interaction of air bubbles with surfaces immersed in water is of fundamental importance in many fields of application ranging from energy to biology. However, many aspects of this topic such as the stability of surfaces in contact with bubbles remain unexplored. For this reason, in this work, we investigate the interaction of air bubbles with different kinds of dispersive surfaces immersed in ...
- DOI:
- 10.1021/acs.langmuir.7b02915
- https://doi.org/10.1021/acs.langmuir.7b02915
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