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- Author:
- Kalekar, Ajit M.; Sharma, Kiran Kumar K.; Luwang, Meitram N.; Sharma, Geeta K.
- Source:
- RSC advances 2016 v.6 no.14 pp. 11911-11920
- ISSN:
- 2046-2069
- Subject:
- catalysts; catalytic activity; liquids; nanomaterials; p-nitrophenol; palladium; porosity; surface area; surfactants; thermal stability
- Abstract:
- ... The catalytic activity of bare and porous palladium nanostructures viz. palladium nanoballs (PdNBs) and palladium urchins (Pdurc) synthesized in surfactant based liquid crystalline mesophase have been investigated in the reduction of 4-nitrophenol. The loading of PdNBs and Pdurc nanocatalyst in the reaction are optimized to 1.57 × 10⁻⁴ mol% and 1.57 × 10⁻³ mol% respectively. The surface area norma ...
- DOI:
- 10.1039/c5ra23138h
-
http://dx.doi.org/10.1039/c5ra23138h
- Author:
- Shen, Tiejun; Wang, Daxi; Yun, Jimmy; Liu, Qinglian; Liu, Xinghua; Peng, Zhongxiao
- Source:
- RSC advances 2016 v.6 no.14 pp. 11637-11647
- ISSN:
- 2046-2069
- Subject:
- adsorption; rheology; scanning electron microscopy; shear stress; soaps; thickeners; viscoelasticity; working conditions; zinc
- Abstract:
- ... Although lubricating greases with zinc dialkyl-dithiophates (ZDDP) have been used widely, the influence of ZDDP on the rheological properties of lithium–calcium-based greases (LCBG) has not been reported. This work investigated the effects of ZDDP on the rheology and mechanical stability of lithium–calcium-based greases (LCBG) by means of scanning electron microscopic (SEM) analysis, rheology char ...
- DOI:
- 10.1039/c5ra20288d
-
http://dx.doi.org/10.1039/c5ra20288d
- Author:
- Liu, Xue; Li, Tianze; Hou, Yu; Wu, Qiuhua; Yi, Jie; Zhang, Guolin
- Source:
- RSC advances 2016 v.6 no.14 pp. 11711-11718
- ISSN:
- 2046-2069
- Subject:
- aqueous solutions; biosensors; carbon quantum dots; fluorescence; microwave treatment; pH; photoluminescence; proteins; temperature
- Abstract:
- ... A new synthetic strategy has been developed for facile and green fabrication of highly photoluminescent carbon dots (CDs) via a one-step microwave treatment of the denatured proteins in aqueous solution. The as-prepared CDs, possessing excellent up-conversion fluorescent properties, can serve as a multifunctional fluorescent nanosensor for pH and temperature. CDs prepared from various protein carb ...
- DOI:
- 10.1039/c5ra23081k
-
http://dx.doi.org/10.1039/c5ra23081k
- Author:
- Bubnov, Alexej; Iwan, Agnieszka; Cigl, Martin; Boharewicz, Bartosz; Tazbir, Igor; Wójcik, Kamil; Sikora, Andrzej; Hamplová, Věra
- Source:
- RSC advances 2016 v.6 no.14 pp. 11577-11590
- ISSN:
- 2046-2069
- Subject:
- annealing; atomic force microscopy; chemical structure; dielectric spectroscopy; electric potential difference; electrochemistry; liquids; organic compounds; photosensitivity; solar cells; temperature; ultraviolet-visible spectroscopy
- Abstract:
- ... New photosensitive liquid crystalline compounds with a specific molecular structure have been designed in order to use them as functional dopants for organic photovoltaic devices. The main idea is to establish the effect of doping on the bulk-heterojunction solar cell properties and characteristics. As a part of basic characterisation, the self-assembling behaviour of three new organic compounds h ...
- DOI:
- 10.1039/c5ra23137j
-
http://dx.doi.org/10.1039/c5ra23137j
- Author:
- Pulya, Sravani; Kommagalla, Yadagiri; Sant, Duhita G.; Jorwekar, Shweta U.; Tupe, Santosh G.; Deshpande, Mukund V.; Ramana, Chepuri V.
- Source:
- RSC advances 2016 v.6 no.14 pp. 11691-11701
- ISSN:
- 2046-2069
- Subject:
- Aspergillus fumigatus; Aspergillus niger; Candida glabrata; Cryptococcus neoformans; antifungal properties; antineoplastic agents; cycloaddition reactions; enzymes; ergosterol; fluconazole; lanosterol; mechanism of action; screening
- Abstract:
- ... A novel 4-(1-phenyl-1-hydroxyethyl)-1-(o-hydroxyphenyl)-1H-1,2,3-triazole was designed by integrating the structural features of triazole PITENIN anticancer agents and the azole class of antifungal drugs. A two-step protocol comprising the Barbier propargylation and Cu-catalyzed azide–alkyne cycloaddition was established to synthesise a diverse set of compounds of this class. Their screening again ...
- DOI:
- 10.1039/c5ra25145a
-
http://dx.doi.org/10.1039/c5ra25145a
- Author:
- Li, Guangci; Sun, Yuanyuan; Li, Xuebing; Liu, Yunqi
- Source:
- RSC advances 2016 v.6 no.14 pp. 11855-11862
- ISSN:
- 2046-2069
- Subject:
- adsorption; boehmite; crystal structure; crystallites; electrostatic interactions; hydrogen bonding; models; pH; sorption isotherms; surface area; surfactants; texture
- Abstract:
- ... Spindle-like boehmites with high adsorption capacity for Congo red (CR) from water were prepared via a hydrothermal synthesis method without any surfactants. The crystallite sizes of boehmites can be subtly adjusted by hydrothermal post-treatment for various durations, and the crystalline structure, morphology and textural properties of boehmites were characterized by different techniques. The ads ...
- DOI:
- 10.1039/c5ra24595h
-
http://dx.doi.org/10.1039/c5ra24595h
- Author:
- Xiao, He; He, Beihai; Li, Junrong
- Source:
- RSC advances 2016 v.6 no.14 pp. 11522-11527
- ISSN:
- 2046-2069
- Subject:
- Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; crosslinking; electrolytes; ion exchange resins; nuclear magnetic resonance spectroscopy; paper; papermaking; particle size; polygalacturonic acid; polystyrenes; quaternary ammonium compounds; scanning electron microscopy; sorption isotherms; surface area
- Abstract:
- ... In a papermaking system, severe drawbacks on machine runnability and paper quality occur due to a build-up of dissolved and colloidal substances (DCS) in the whitewater. The adsorption of DCS on solid sorbents is proposed to remove DCS from the whitewater. Polystyrene (PS) spheres with poly(methacryloxyethyltrimethyl ammonium chloride) (poly-MAC) were prepared as adsorbents for the removal of poly ...
- DOI:
- 10.1039/c5ra25247d
-
http://dx.doi.org/10.1039/c5ra25247d
- Author:
- Lian, Xiao; Yan, Bing
- Source:
- RSC advances 2016 v.6 no.14 pp. 11570-11576
- ISSN:
- 2046-2069
- Subject:
- BTEX (benzene, toluene, ethylbenzene, xylene); acetophenones; adsorption; coordination polymers; fluorescence; ions; methylene blue; particle size; pollutants; scanning electron microscopy; sodium acetate; vapors
- Abstract:
- ... A series of nano-sized lanthanide metal–organic frameworks (Ln-MOFs) which are isostructural with parent MOF-76(Ln) (Ln = Eu, Tb, Sm, Dy) are synthesized under solvothermal conditions. The morphology and particle size of the Ln-MOFs demonstrated by scanning electron microscopy can be changed by increasing the quantities of sodium acetate whose capping effect provides more coordinate sites for lant ...
- DOI:
- 10.1039/c5ra23681a
-
http://dx.doi.org/10.1039/c5ra23681a
- Author:
- Golobostanfard, Mohammad Reza; Abdizadeh, Hossein
- Source:
- RSC advances 2016 v.6 no.14 pp. 11903-11910
- ISSN:
- 2046-2069
- Subject:
- Raman spectroscopy; X-ray diffraction; crystallization; diodes; electric potential difference; electrophoresis; nanoparticles; porosity; solar cells; sulfides
- Abstract:
- ... Graded band gap chalcopyrite solar cells are fabricated based on an all solution processable synthesis method with the aid of electrophoretic deposition and a superstrate structure. The solvothermally synthesized nanoparticles crystallize in the chalcopyrite–wurtzite mixed phase without any trace of impurity phases, as confirmed by XRD and Raman spectroscopy. Crack-free electrophoretic deposited f ...
- DOI:
- 10.1039/c5ra26315h
-
http://dx.doi.org/10.1039/c5ra26315h
- Author:
- Zuo, Wei; Yu, Guiqin; Dong, Zhengping
- Source:
- RSC advances 2016 v.6 no.14 pp. 11749-11753
- ISSN:
- 2046-2069
- Subject:
- carbon; carbonization; catalysts; catalytic activity; nanoparticles; nickel; porous media
- Abstract:
- ... An N-doped mesoporous carbon supported Ni nanoparticle nanocatalyst (Ni/m-CN) was prepared in a facile manner by the carbonization of Ni-MOFs. The Ni/m-CN nanocatalyst exhibited excellent catalytic activity for the reduction of nitroarenes under mild conditions. Moreover, the Ni/m-CN nanocatalyst can also be easily recovered and reused due to its superparamagnetism. ...
- DOI:
- 10.1039/c5ra23082a
-
http://dx.doi.org/10.1039/c5ra23082a
- Author:
- Wang, Shucheng; Huang, Xuhu; Wang, Qi; Ge, Zemei; Wang, Xin; Li, Runtao
- Source:
- RSC advances 2016 v.6 no.14 pp. 11754-11757
- ISSN:
- 2046-2069
- Subject:
- alkenes; catalytic activity; chemical bonding; copper; hydrolysis; imines; quinoline; sulfonylation
- Abstract:
- ... A novel and highly efficient cascade synthesis of sulfonated quinoline dione derivatives from N-(2-cyanoaryl) methylacrylamides and sulfonylhydrazides in good yields is described. The reaction proceeds through radical addition, cyclization, and imine hydrolysis, in which one new C–C bond and one CO bond were formed. ...
- DOI:
- 10.1039/c5ra27878c
-
http://dx.doi.org/10.1039/c5ra27878c
- Author:
- Sadeghalvad, B.; Azadmehr, A.; Hezarkhani, A.
- Source:
- RSC advances 2016 v.6 no.14 pp. 11719-11734
- ISSN:
- 2046-2069
- Subject:
- Fourier transform infrared spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; adsorbents; adsorption; case studies; decontamination; groundwater; groundwater contamination; iron; mining; models; pH; pollutants; response surface methodology; risk reduction; sulfates; wastes; wells; Iran
- Abstract:
- ... To reduce environmental risks of mining activities, it is important to find eco-friendly and efficient ways of using mine waste. One way to utilize mine waste is to reuse it as an adsorbent in environmental decontamination. This study describes the efficiency of Choghart iron ore mineral wastes (namely quartz-albitophire and metasomatite) as efficient adsorbents of sulfate in contaminated groundwa ...
- DOI:
- 10.1039/c5ra21843h
-
http://dx.doi.org/10.1039/c5ra21843h
- Author:
- Ji, Peng; Jin, Jin; Chen, Xianglin; Wang, Chaosheng; Wang, Huaping
- Source:
- RSC advances 2016 v.6 no.14 pp. 11492-11500
- ISSN:
- 2046-2069
- Subject:
- adsorption; copolymerization; desorption; fabrics; hydrogen bonding; lint cotton; nuclear magnetic resonance spectroscopy; permeability; porous media; water vapor
- Abstract:
- ... The water state and distribution in PET and cotton fibres were studied by low-field proton nuclear magnetic resonance. The spin–spin relaxation times (T₂) were measured with single pulse free induction decay (FID). There are three different states of adsorbed water in the fibre materials. The slowest fraction T₂₂ can be assigned to the bulk water. The intermediate component T₂₁ can be ascribed to ...
- DOI:
- 10.1039/c5ra21018f
-
http://dx.doi.org/10.1039/c5ra21018f
- Author:
- Zhang, Jie; Pang, Chengcai; Wu, Guolin
- Source:
- RSC advances 2016 v.6 no.14 pp. 11848-11854
- ISSN:
- 2046-2069
- Subject:
- 4-hydroxybenzoic acid; Fourier transform infrared spectroscopy; biodegradability; condensation reactions; crosslinking; differential scanning calorimetry; lignin; molecular weight; nuclear magnetic resonance spectroscopy; polyesters; raw materials; renewable resources; solvents; syringic acid; tensile strength; thermogravimetry; thermoplastics; vanillic acid
- Abstract:
- ... Crosslinked polyesters were successfully prepared using thiol-ene click chemistry. Vanillic acid, syringic acid, and p-hydroxybenzoic acid have similar aromatic structures. They can be derived from a renewable resource, lignin. In this paper, they were used as raw materials for the synthesis of unsaturated thermoplastic polyesters, by polycondensation in solvent. The obtained polyesters were chara ...
- DOI:
- 10.1039/c5ra26155d
-
http://dx.doi.org/10.1039/c5ra26155d
- Author:
- Premakshi, H. G.; Kariduraganavar, M. Y.; Mitchell, G. R.
- Source:
- RSC advances 2016 v.6 no.14 pp. 11802-11814
- ISSN:
- 2046-2069
- Subject:
- ammonium; anion exchange; anion-exchange membranes; heat; permeability; pervaporation; polyvinyl alcohol; quaternary ammonium compounds; silica; sorption; temperature
- Abstract:
- ... Composite anion-exchange membranes were prepared using sol–gel techniques with poly(vinyl alcohol) (PVA) and anion-exchange silica precursor (AESP). Ammonium functionality was created on the AESP through a ring opening reaction between 2-(3-aminoethylamino)propyltrimethoxysilane and glycidyltrimethylammonium chloride under mild heating conditions. The resulting membranes were subjected to physico- ...
- DOI:
- 10.1039/c5ra19858e
-
http://dx.doi.org/10.1039/c5ra19858e
- Author:
- Dharanivasan, G.; Mohammed Riyaz, S. U.; Michael Immanuel Jesse, D.; Raja Muthuramalingam, T.; Rajendran, G.; Kathiravan, K.
- Source:
- RSC advances 2016 v.6 no.14 pp. 11773-11785
- ISSN:
- 2046-2069
- Subject:
- DNA; absorbance; citrates; color; colorimetry; detection limit; flowers; hybridization; nanogold; oligonucleotide probes; particle size; polymerase chain reaction; viruses
- Abstract:
- ... The DNA templated self-assembly of gold nanoparticles clustered in different configurations (n = 2–∞) was investigated in the colorimetric detection of ToLCNDV DNA using a gold nanoparticle conjugated bifunctional oligonucleotide probe. The AuNP-bifunctional oligonucleotide probe conjugate was prepared using citrate capped AuNPs (∼19 nm) and virus specific ssoligo probes 1 and 2. Each conjugate co ...
- DOI:
- 10.1039/c5ra25559g
-
http://dx.doi.org/10.1039/c5ra25559g
- Author:
- Nowicki, Janusz; Łuczak, Justyna; Stańczyk, Dorota
- Source:
- RSC advances 2016 v.6 no.14 pp. 11591-11601
- ISSN:
- 2046-2069
- Subject:
- adsorption; ethylene oxide; fatty acid methyl esters; hydrogen; ionic liquids; ionization; micelles; sulfates; surfactants; temperature; thermodynamics
- Abstract:
- ... A series of amphiphilic 1-alkyl-3-methylimidazolium hydrogen sulfate ionic liquids were synthesized. Acidic hydrogen sulfate ionic liquids with the alkyl chains C₆–C₁₄ are characterized by good surface properties. Their surface properties (adsorption and micellization parameters, degree of ionization of micelles, Krafft temperatures and thermodynamic parameters) were determined. Synthesized ionic ...
- DOI:
- 10.1039/c5ra23415h
-
http://dx.doi.org/10.1039/c5ra23415h
- Author:
- Lillepärg, Jelena; Georgopanos, Prokopios; Emmler, Thomas; Shishatskiy, Sergey
- Source:
- RSC advances 2016 v.6 no.14 pp. 11763-11772
- ISSN:
- 2046-2069
- Subject:
- additives; carbon dioxide; differential scanning calorimetry; mixing; molecular weight; nitrogen; nuclear magnetic resonance spectroscopy; permeability; polyethylene glycol; thin film composite membranes
- Abstract:
- ... This paper considers Pebax® MH 1657 as a material for the CO₂/N₂ separating layer in thin film composite (TFC) membranes. The CO₂ permeability of Pebax® can be improved via blending with various poly(ethylene oxide) (PEO) based materials without loss of CO₂/N₂ selectivity. Analogous blends containing PEOs with reactive end groups have been investigated for the possibility of a network formation wi ...
- DOI:
- 10.1039/c5ra22026b
-
http://dx.doi.org/10.1039/c5ra22026b
- Author:
- Tyagi, Kriti; Gahtori, Bhasker; Bathula, Sivaiah; Singh, Niraj Kumar; Bishnoi, Swati; Auluck, S.; Srivastava, A. K.; Dhar, Ajay
- Source:
- RSC advances 2016 v.6 no.14 pp. 11562-11569
- ISSN:
- 2046-2069
- Subject:
- X-ray diffraction; density functional theory; hardness; mechanical properties; melting; scanning electron microscopy; temperature; tin; transmission electron microscopy
- Abstract:
- ... Motivated by the unprecedented thermoelectric performance of SnSe, we report its band structure calculations, based on density functional theory using the full potential linearized augmented plane wave. These calculations were further extended to evaluate the electrical transport properties using Boltzmann transport theory and the results were compared with the as-synthesized polycrystalline count ...
- DOI:
- 10.1039/c5ra23742d
-
http://dx.doi.org/10.1039/c5ra23742d
- Author:
- Zhu, Xi; Wang, Min
- Source:
- RSC advances 2016 v.6 no.14 pp. 11786-11794
- ISSN:
- 2046-2069
- Subject:
- adsorption; graphene; hydrogen; models; nanomaterials; optical properties; spectral analysis
- Abstract:
- ... The electronic and optical properties of surface hydrogenated armchair graphene nanoribbons (H-AGNRs) are investigated by first-principle ab initio calculations with quasi-particle corrections. The variation in band gaps is scrutinized in terms of bonding characteristics and the localization of wavefunctions. Optical absorption spectra, exciton binding energies and exciton wavefunctions are invest ...
- DOI:
- 10.1039/c5ra26686f
-
http://dx.doi.org/10.1039/c5ra26686f