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2.509 Aktuelle Fachpublikationen zum Thema temperature

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Energy efficient microwave synthesis of mesoporous Ce0.5M0.5O2 (Ti, Zr, Hf) nanoparticles for low temperature CO oxidation in an ionic liquid – a comparative study

16.12.2014 | Tarek Alammar; Ying-Kit Chow; Anja-Verena Mudring, New Journal of Chemistry, 2014

Ce0.5M0.5O2 (M = Ti, Zr, Hf) nanoparticles have been successfully synthesized by microwave irradiation in the ionic liquid [C4mim][Tf2N] (1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide). The morphology, crystallinity, and chemical composition of the obtained materials were ...

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Synergistic Effect between Defect Sites and Functional Groups on the Hydrolysis of Cellulose over Activated Carbon

12.12.2014 | Guo Shiou Foo, Carsten Sievers, ChemSusChem, 2014

Abstract The chemical oxidation of activated carbon by H2O2 and H2SO4 is investigated, structural and chemical modifications are characterized, and the materials are used as catalysts for the hydrolysis of cellulose. Treatment with H2O2 enlarges the pore size and imparts functional groups such ...

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Effect of operating conditions on size and morphology of amylose nanoparticles prepared by precipitation

12.12.2014 | Yan Dong, Yanjiao Chang, Qian Wang, Jin Tong, Jiang Zhou, Starch - Stärke, 2014

Nano‐sized amylose particles were prepared by precipitating amylose solution (using DMSO/water mixture as solvent) with absolute ethanol. Effects of operating conditions, including temperature and solvent composition for preparing amylose solution, amylose concentration, ethanol amount used for ...

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Rhodium Nanoflowers Stabilized by a Nitrogen‐Rich PEG‐Tagged Substrate as Recyclable Catalyst for the Stereoselective Hydrosilylation of Internal Alkynes

11.12.2014 | Wusheng Guo, Roser Pleixats, Alexandr Shafir, Teodor Parella, Advanced Synthesis & Catalysis, 2014

Abstract Morphology and size controllable rhodium nanoparticles stabilized by a nitrogen‐rich polyoxyethylenated derivative have been prepared by reduction of RhCl3 with NaBH4 in water at room temperature and fully characterized. The flower‐like Rh NPs are effective and recyclable catalysts ...

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CIS and CIGS nanomaterials prepared by solvothermal method and their spectral properties

10.12.2014 | Fei Huang, Ai‐Hua Yan, Hui Zhao, Zhen Li, Xiao‐Ping Cai, Yue‐Hua Wang, Yu‐Chang Wu, Shi‐Bin Yin, Ying‐Huai Qiang, Crystal Research and Technology, 2014

Uniform CIS and CIGS nanomaterials were successfully synthesized by a simple amino‐based assisted solvothermal technique using PVP‐30 as the surfactant. The influence of surfactant, temperature and Ga amount on the structure, morphology, phase and spectral property was analyzed in detail. The ...

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Shape-controlled synthesis of phosphor K2SiF6:Mn4+ nanorods and their luminescence properties

10.12.2014 | Xiaoqing Li; Xiangming Su; Ping Liu; Jie Liu; Zhiling Yao; Jiajun Chen; Hui Yao; Xibin Yu; Ming Zhan, CrystEngComm, 2014

A series of efficient red phosphor K2SiF6:Mn4+ nanoparticles with uniform morphology and dispersity were successfully prepared through a fast liquid–solid solution route at room temperature. Potassium oleate and SiO2 spheres/KMnO4 molar ratio play an important role in the formation of the nanorod ...

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Thermal, mechanical properties, and low‐temperature performance of fibrous nanoclay‐reinforced epoxy asphalt composites and their concretes

05.12.2014 | Yifan Sun, Yuge Zhang, Ke Xu, Wei Xu, Dier Yu, Lei Zhu, Hongfeng Xie, Rongshi Cheng, Journal of Applied Polymer Science, 2014

ABSTRACT Epoxy asphalt (EA) concretes have been widely used in the pavement of orthotropic steel bridge decks. The objective of this study was to figure out the enhanced effects of natural fibrous attapulgite (ATT) as a reinforced nanofiller in ATT/EA nanocomposites through a comparison of the ...

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Behavior of Fouling Deposits Formed on a Probe with Different Surface Temperatures

05.12.2014 | Hao Zhou; Bin Zhou; Hailong Zhang; Letian Li, Energy & Fuels, 2014

Zhun Dong (ZD) coal, which is characterized by high sodium levels, was burned in a pilot-scale furnace to investigate the behavior of fouling deposits on an oil-cooled probe with different surface temperatures. In this study, the fouling deposits were collected at 1298 K furnace temperature. In ...

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pH- and temperature-responsive aqueous foams stabilized by hairy latex particles

02.12.2014 | Syuji Fujii; Ko Akiyama; Saori Nakayama; Sho Hamasaki; Shin-ichi Yusa; Yoshinobu Nakamura, Soft Matter, 2014

Polystyrene (PS) particles carrying pH- and temperature-responsive poly[2-(dimethylamino)ethyl methacrylate] (PDMA) hairs (PDMA–PS particles) were synthesized by dispersion polymerization. The diameter, diameter distribution, morphology, chemical composition and surface chemistry of the particles ...

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Shape-controlled synthesis of K2SiF6:Mn4+ nanorods phosphor and luminescent properties

02.12.2014 | Xiaioqing Li; Xiangming Su; Pin Liu; jie liu; Zhiling Yao; Jiajun Chen; Hui Yao; Xi bin Yu; Ming Zhan, CrystEngComm, 2014

A series of efficient red phosphor K2SiF6:Mn4+ nanoparticles with uniform morphology and dispersity were successfully prepared through a fast liquid-solid-solution route at room temperature. Potassium oleate and SiO2 spheresKMnO4 molar ratio play important role in the formation of nanorods ...

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