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- Author:
- Nelson, Emily G.; Brody, Scott I.; Kampf, Jeff W.; Bartlett, Bart M.
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18194-18198
- ISSN:
- 2050-7496
- Subject:
- Grignard reagents; aluminum; aluminum chloride; batteries; corrosion; electrochemistry; electrodes; electrolysis; electrolytes; magnesium; platinum; stainless steel
- Abstract:
- ... Using Al(OPh)₃ rather than the typical AlCl₃ with Grignard reagents affords a Mg-ion electrolyte with a reduced chloride content. A 1 : 4 Al(OPh)₃–PhMgCl mixture gives a magnesium tetraphenylaluminate salt that exhibits anodic stability up to 5 V vs. Mg²⁺/⁰ on both platinum and stainless steel working electrodes, and shows much reduced corrosion (pitting) of stainless steel after extended electrol ...
- DOI:
- 10.1039/c4ta04625k
-
http://dx.doi.org/10.1039/c4ta04625k
- Author:
- Li, Panpan; Jin, Zhaoyu; Xiao, Dan
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18420-18427
- ISSN:
- 2050-7496
- Subject:
- ambient temperature; boron; catalysts; catalytic activity; electrochemistry; electron transfer; graphene oxide; hydrogen production; nanocomposites; oxygen production; pH; phosphorus; seawater; synergism
- Abstract:
- ... Two-dimensional (2D) nanocomposites are fabricated on reduced graphene oxide (Co–P–B/rGO) via a one-step method at room temperature. By tuning the molar ratio of phosphorus and boron sources in reactants, outstanding bi-functional catalysts for the oxygen evolution reaction (OER) can be obtained with an extremely low onset overpotential of 50 mV and a small Tafel slope of 68 mV dec⁻¹, as well as f ...
- DOI:
- 10.1039/c4ta03962a
-
http://dx.doi.org/10.1039/c4ta03962a
- Author:
- Oropeza, Freddy E.; Villar-Garcia, Ignacio J.; Palgrave, Robert G.; Payne, David J.
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18241-18245
- ISSN:
- 2050-7496
- Subject:
- X-ray photoelectron spectroscopy; annealing; bismuth; chemistry; hypoxia; powders; temperature; zirconium oxide
- Abstract:
- ... Single crystalline pyrochlore Bi₂Ti₂O₇ films have been grown in three different orientations on yttria-stabilised zirconia at temperatures as low as 600 °C, by using a simple wet chemistry method based on the spin-coating technique. Contrary to free-standing powders and polycrystalline films, epitaxial single crystalline Bi₂Ti₂O₇ is stable relative to other bismuth titanate compounds at temperatur ...
- DOI:
- 10.1039/c4ta04352a
-
http://dx.doi.org/10.1039/c4ta04352a
- Author:
- Cao, Yuan; Ding, Liping; Hu, Wenting; Peng, Junxia; Fang, Yu
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18488-18496
- ISSN:
- 2050-7496
- Subject:
- anionic surfactants; aqueous solutions; chemical species; cobalt; copper; fluorescence; fluorescent dyes; heavy metals; hydrophilicity; hydrophobicity; iron; lead; mercury; metal ions; nickel; principal component analysis; titration; wavelengths
- Abstract:
- ... Pattern recognition has been widely used to detect and identify multiple analytes. The strategies for realizing pattern recognition of a single sensor are in significant demand. In the present work, a particular bispyrene-based fluorophore containing a hydrophilic spacer, Py-TOA-Py, was synthesized, and it was observed that its mixture with anionic surfactant assemblies realizes multiple fluoresce ...
- DOI:
- 10.1039/c4ta03608e
-
http://dx.doi.org/10.1039/c4ta03608e
- Author:
- Huang, Haining; Bi, Hui; Zhou, Mi; Xu, Feng; Lin, Tianquan; Liu, Fengxin; Zhang, Lingyan; Zhang, Hui; Huang, Fuqiang
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18215-18218
- ISSN:
- 2050-7496
- Subject:
- ambient pressure; ceramics; graphene; silica; vapors
- Abstract:
- ... A three-dimensional elastic macroscopic graphene network (3D-GN) was prepared with the assistance of porous SiO₂ ceramic substrates by using ambient pressure chemical vapor deposition, which is suitable for thermal management application. The free standing elastic macroscopic 3D-GN possesses excellent electrical, mechanical and thermal transfer properties. ...
- DOI:
- 10.1039/c4ta03801k
-
http://dx.doi.org/10.1039/c4ta03801k
- Author:
- Uchaker, E.; Zheng, Y. Z.; Li, S.; Candelaria, S. L.; Hu, S.; Cao, G. Z.
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18208-18214
- ISSN:
- 2050-7496
- Subject:
- batteries; cathodes; electrochemistry; energy density; nanocrystals; sol-gel processing; vanadium
- Abstract:
- ... Amorphous and nanocrystalline vanadium pentoxide (V₂O₅) were prepared through a combination of sol–gel processing paired with electrochemical deposition and investigated as cathodes for sodium-ion batteries. Amorphous V₂O₅ demonstrated superior electrochemical properties upon sodiation as compared to its crystalline counterpart. More specifically, amorphous vanadium pentoxide had a measured capaci ...
- DOI:
- 10.1039/c4ta03788j
-
http://dx.doi.org/10.1039/c4ta03788j
- Author:
- Dubau, Laetitia; Lopez-Haro, Miguel; Durst, Julien; Guétaz, Laure; Bayle-Guillemaud, Pascale; Chatenet, Marian; Maillard, Frédéric
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18497-18507
- ISSN:
- 2050-7496
- Subject:
- catalysts; catalytic activity; cathodes; electrochemistry; electrolytes; energy conversion; fuel cells; liquids; nanocrystallites; nanoparticles; platinum; research and development
- Abstract:
- ... Long-term catalytic performance of electrode materials is a well-established research priority in electrochemical energy conversion and storage systems, such as proton-exchange membrane fuel cells. Despite extensive efforts in research and development, Pt-based nanoparticles remain the only – but an unstable – electrocatalyst able to accelerate efficiently the rate of the oxygen reduction reaction ...
- DOI:
- 10.1039/c4ta03975k
-
http://dx.doi.org/10.1039/c4ta03975k
- Author:
- Kaur, Aman Preet; Ergun, Selin; Elliott, Corrine F.; Odom, Susan A.
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18190-18193
- ISSN:
- 2050-7496
- Subject:
- chemistry; graphene; lithium batteries
- Abstract:
- ... 3,7-Bis(trifluoromethyl)-N-ethylphenothiazine (BCF3EPT) was evaluated as a redox shuttle for overcharge protection in lithium-ion batteries. Constant-charging experiments were performed to compare the compound to 1,4-di-tert-butyl-2,5-dimethoxybenzene and N-ethylphenothiazine. BCF3EPT showed significantly longer overcharge protection when compared to either benchmark at the same concentrations in ...
- DOI:
- 10.1039/c4ta04463k
-
http://dx.doi.org/10.1039/c4ta04463k
- Author:
- Xing, Man; Kong, Ling-Bin; Liu, Mao-Cheng; Liu, Ling-Yang; Kang, Long; Luo, Yong-Chun
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18435-18443
- ISSN:
- 2050-7496
- Subject:
- anodes; catalysts; catalytic activity; cobalt; cost effectiveness; crystal structure; electric power; electrochemistry; hydrogen; hydrogen fuels; nanoparticles; oxides; oxygen; oxygen production; porosity; surface area
- Abstract:
- ... Water splitting, to produce hydrogen and oxygen, has long been considered to be a desirable option for the storage of electrical energy. The catalysts for oxygen evolution reactions (OER) are very important in this process. Herein, we have synthesized Co₃V₂O₈ nanoparticles by a simple and cost-effective technique, which have low crystallinity and large specific surface area (122.8 m² g⁻¹). Because ...
- DOI:
- 10.1039/c4ta03776f
-
http://dx.doi.org/10.1039/c4ta03776f
- Author:
- Li, Yan; Wang, Lihuan; Yin, Xia; Ding, Bin; Sun, Gang; Ke, Tao; Chen, Jingyuan; Yu, Jianyong
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18304-18312
- ISSN:
- 2050-7496
- Subject:
- chemistry; color; colorimetry; detection limit; lead; metal ions; nanofibers; polyacrylonitrile
- Abstract:
- ... Given the dire consequences of accidental lead ion (Pb²⁺) exposure, a portable, sensitive and robust analytical approach capable of colorimetric visualization is highly desirable. In this study, we demonstrate a colorimetric strip that relies on a novel polydiacetylene (PDA) embedded polyacrylonitrile nanofibrous membrane (PAN NFM). The Pb²⁺-chromic PDA is prepared from controlled mixtures of 10,1 ...
- DOI:
- 10.1039/c4ta04547e
-
http://dx.doi.org/10.1039/c4ta04547e
- Author:
- Huang, Jianying; Lai, Yuekun; Wang, Luning; Li, Shuhui; Ge, Mingzheng; Zhang, Keqin; Fuchs, Harald; Chi, Lifeng
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18531-18538
- ISSN:
- 2050-7496
- Subject:
- adhesion; droplets; electric potential difference; electrochemistry; electrolytes; hydrophobicity; liquids; microparticles; mixing; nanoparticles; titanium dioxide; wettability
- Abstract:
- ... Hierarchical surfaces with specific topographical morphology and chemical components can be found on many living creatures in nature. They offer special wettability and adhesion (sliding, sticky or patterned superhydrophobic surfaces), a functional platform for microfluidic management and other biological functions. Inspired by their precise arrangement of structures and surface components, we des ...
- DOI:
- 10.1039/c4ta04090b
-
http://dx.doi.org/10.1039/c4ta04090b
- Author:
- Huang, Liang; Zhu, Pengli; Li, Gang; (Daniel) Lu, Daoqiang; Sun, Rong; Wong, Chingping
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18246-18255
- ISSN:
- 2050-7496
- Subject:
- dielectric properties; electrostatic interactions; epoxides; glass transition temperature; graphene oxide; nanoparticles; nanosheets; polymers; silica; thermal conductivity; thermal expansion
- Abstract:
- ... Reduced graphene oxide (RGO)-encapsulated SiO₂ hybrids (SiO₂@RGO) were fabricated from the thermal reduction of electrostatically assembled SiO₂@GO hybrids. Then, epoxy composites, filled with SiO₂, SiO₂@GO and SiO₂@RGO hybrids, were prepared by a solvent-free curing process, and their thermal, dielectric and thermo-mechanical properties were investigated and compared. In the SiO₂@RGO/epoxy compos ...
- DOI:
- 10.1039/c4ta03702b
-
http://dx.doi.org/10.1039/c4ta03702b
- Author:
- Wang, Yajun; Zhan, Xueying; Wang, Fengmei; Wang, Qisheng; Safdar, Muhammad; He, Jun
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18413-18419
- ISSN:
- 2050-7496
- Subject:
- energy; hot water treatment; irradiation; nanowires; photocatalysis; photocatalysts; silicon; ultraviolet radiation; vapors; zinc oxide
- Abstract:
- ... ZnO/ZnSₓSe₁₋ₓ core–shell nanowire arrays on a silicon substrate were successfully prepared via a hydrothermal method followed by chemical vapor deposition (CVD) of the ZnSₓSe₁₋ₓ shell. By optimizing the CVD growth conditions, a crystalline ZnSₓSe₁₋ₓ shell and well-aligned ZnO/ZnSₓSe₁₋ₓ interface were achieved, which plays an important role towards the enhanced performance of photocatalytic activit ...
- DOI:
- 10.1039/c4ta04293j
-
http://dx.doi.org/10.1039/c4ta04293j
- Author:
- Dong, Chaoqun; Wang, Yan; Xu, Junling; Cheng, Guanhua; Yang, Wanfeng; Kou, Tianyi; Zhang, Zhonghua; Ding, Yi
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18229-18235
- ISSN:
- 2050-7496
- Subject:
- capacitance; copper; copper nanoparticles; cupric oxide; cuprous oxide; electrochemistry; electrodes; energy; energy density; hydroxides; mobile telephones
- Abstract:
- ... Nanostructured Cu oxides/hydroxides are promising materials for supercapacitors because of their high theoretical capacitance, low cost and friendliness to environment. However, the development of commercially viable Cu oxides/hydroxides with superior capacitive performance is still challenging. Here, 3D binder-free Cu₂O@Cu nanoneedle arrays electrode was developed via facile electrochemistry. The ...
- DOI:
- 10.1039/c4ta04329d
-
http://dx.doi.org/10.1039/c4ta04329d
- Author:
- Liu, Guandong; Nishimura, Shin-ichi; Chung, Sai Cheong; Fujii, Kotaro; Yashima, Masatomo; Yamada, Atsuo
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18353-18359
- ISSN:
- 2050-7496
- Subject:
- activation energy; ambient temperature; cathodes; chemistry; cobalt; iron; magnesium; manganese; mechanics; models; sodium
- Abstract:
- ... Phase pure sodium magnesium pyrophosphate Na₁.₈₂Mg₁.₀₉P₂O₇ was synthesized by a solid state reaction, and used as a model system to understand the Na⁺ dynamics in the related cathode materials Na₂₋ₓM₁₊ₓ/₂P₂O₇ (M = Fe, Mn, and Co). We found a three-dimensional framework structure formed by interconnecting Mg₂O₁₁ dimers with P₂O₇ pyrophosphate groups, where Na cages align along the [100] direction a ...
- DOI:
- 10.1039/c4ta03356f
-
http://dx.doi.org/10.1039/c4ta03356f
- Author:
- Li, Xiao-Dong; Zang, Hua-Ping; Wang, Jun-Tao; Wang, Jun-Fei; Zhang, Hong
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18554-18561
- ISSN:
- 2050-7496
- Subject:
- ambient temperature; hydrogen; mechanics; porosity; silsesquioxanes; sorption isotherms; surface area; topology; United States
- Abstract:
- ... Four types of tetraphenyl silsesquioxane based covalent-organic frameworks (sil-COFs) were designed with the ctn and bor net topologies using molecular mechanics. The computed results revealed that these sil-COFs possess excellent structural properties, such as high porosity (89–95%) and large H₂ accessible surface area (5476–6331 m² g⁻¹), which is advantageous to hydrogen storage. The H₂ adsorpti ...
- DOI:
- 10.1039/c4ta02692f
-
http://dx.doi.org/10.1039/c4ta02692f
- Author:
- Rajendran, Raja; Shrestha, Lok Kumar; Minami, Kosuke; Subramanian, Munisamy; Jayavel, Ramasamy; Ariga, Katsuhiko
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18480-18487
- ISSN:
- 2050-7496
- Subject:
- carbon nanotubes; ceric oxide; chemical precipitation; electrical equipment; electrochemistry; electrolytes; energy density; graphene oxide; nanocomposites
- Abstract:
- ... We report a one-step conversion of a dimensionally mixed ternary nanocomposite from zero-dimensional (0D) cerium oxide (CeO₂), one-dimensional (1D) carbon nanotubes (CNTs), and two-dimensional (2D) reduced graphene oxide (RGO) nanomaterials by the chemical precipitation method. The RGO/CNT/CeO₂ ternary nanocomposite showed excellent electrochemical performance (electrical double layer capacitor pr ...
- DOI:
- 10.1039/c4ta03996c
-
http://dx.doi.org/10.1039/c4ta03996c
- Author:
- Zhao, Xia; Li, Lingxiao; Li, Bucheng; Zhang, Junping; Wang, Aiqin
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18281-18287
- ISSN:
- 2050-7496
- Subject:
- absorption; adsorption; compressibility; contact angle; hydrophobicity; liquid nitrogen; microparticles; oils; polydimethylsiloxane; polymerization; sodium chloride; thermal stability
- Abstract:
- ... A facile method for preparing porous polydimethylsiloxane (PDMS) sponges is reported. The PDMS sponges are fabricated by the polymerization of the PDMS prepolymer and a curing agent in dimethicone using NaCl microparticles as the hard templates. The porous structure of the PDMS sponges is controllable simply by regulating the weight ratio of prepolymer to dimethicone and the size of the NaCl micro ...
- DOI:
- 10.1039/c4ta04406a
-
http://dx.doi.org/10.1039/c4ta04406a
- Author:
- Khan, Munirah; Suljoti, Edlira; Singh, Archana; Bonke, Shannon A.; Brandenburg, Tim; Atak, Kaan; Golnak, Ronny; Spiccia, Leone; Aziz, Emad F.
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18199-18203
- ISSN:
- 2050-7496
- Subject:
- X-radiation; X-ray scattering; absorption; catalysts; catalytic activity; electrons; manganese; manganese oxides; oxidation
- Abstract:
- ... Soft X-ray absorption and resonant inelastic X-ray scattering at the Mn L-edge are established as tools for gaining electronic structural insights into water oxidation catalysis. The MnOₓ catalyst with the lowest d–d transitions, strongest charge transfer and a higher proportion of Mn³⁺ over Mn²⁺/⁴⁺ produces itinerant electrons that contribute to a higher catalytic activity. ...
- DOI:
- 10.1039/c4ta04185b
-
http://dx.doi.org/10.1039/c4ta04185b
- Author:
- Lelii, Camilla; Bawendi, Moungi G.; Biagini, Paolo; Chen, Po-Yen; Crucianelli, Marcello; D'Arcy, Julio M.; De Angelis, Francesco; Hammond, Paula T.; Po, Riccardo
- Source:
- Journal of materials chemistry A 2014 v.2 no.43 pp. 18375-18382
- ISSN:
- 2050-7496
- Subject:
- cadmium; dyes; electron transfer; electrons; energy; photons; quantum dots; ruthenium; solar cells; titanium dioxide
- Abstract:
- ... CdSe quantum dots of two different sizes exhibiting a maximum emission at 495 nm (CdSe₄₉₅) and 545 nm (CdSe₅₄₅) were combined with di-tetrabutylammonium cis-bis(isothiocyanato)bis(2,2-bipyridyl-4,4-dicarboxylato)ruthenium(ii) (N719) or 2-cyano-3-{5-[7-(4-diphenylamino-phenyl)benzo[1,2,5]thiadiazol-4-yl]-thiophen-2-yl}-acrylic acid (TBTCA) resulting in four novel hybrid organic–inorganic sensitizer ...
- DOI:
- 10.1039/c4ta03098b
-
http://dx.doi.org/10.1039/c4ta03098b