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1.911 Aktuelle Fachpublikationen zum Thema temperature

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Nanocryatalline Pt-CeO2 as an efficient catalyst for room temperature selective reduction of nitroarenes

28.10.2014 | Rajaram Bal; Astha Shukla; Rajib K Singha; Takehiko Sasaki, Green Chemistry, 2014

We have developed a new synthesis strategy to prepare Pt nanoparticles with size between 2-5 nm supported on CeO2 nanoparticle with size between 30-60 nm by hydrothermal method in presence of surfactant cetyltrimethyl ammonium bromide( CTAB) and polymer (PVP). It was found that the catalyst is ...

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Digital Transfer Growth of Patterned 2D Metal Chalcogenides by Confined Nanoparticle Evaporation

24.10.2014 | Masoud Mahjouri-Samani; Mengkun Tian; Kai Wang; Abdelaziz Boulesbaa; Christopher M. Rouleau; Alexander A. Puretzky; ..., ACS Nano, 2014

Developing methods for the facile synthesis of two-dimensional (2D) metal chalcogenides and other layered materials is crucial for emerging applications in functional devices. Controlling the stoichiometry, number of the layers, crystallite size, growth location, and areal uniformity is ...

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The toughening effect and mechanism of styrene‐butadiene rubber nanoparticles for novolac resin

23.10.2014 | Wei‐Wei Liu, Jing‐Jing Ma, Mao‐Sheng Zhan, Kai Wang, Journal of Applied Polymer Science, 2014

ABSTRACT In this article, phenolic nanocomposites were prepared using styrene–butadiene rubber (SBR) nanoparticles with an average particle size of about 60 nm as the toughening agent. The mechanical and thermal properties of phenolic nanocomposites and the toughening mechanism were studied ...

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ChemInform Abstract: Highly Efficient and Chemoselective Transfer Hydrogenation of Nitroarenes at Room Temperature over Magnetically Separable Fe—Ni Bimetallic Nanoparticles.

23.10.2014 | Dhananjay R. Petkar, Brijesh S. Kadu, Rajeev C. Chikate, ChemInform, 2014

Abstract Fe‐Ni nanoparticles are used as catalyst for the selective hydrogenation of nitroarenes (I) to anilines (II) as well as cinnamic ester (III) to 3‐phenylpropanoate (IV).

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Preparation and spectroscopic studies of PbS/nanoMCM-41 nanocomposite

21.10.2014 | Author(s): A. Pourahmad, Arabian Journal of Chemistry, 2014

Publication date: November 2014 Source:Arabian Journal of Chemistry, Volume 7, Issue 5 Author(s): A. Pourahmad The present work describes the preparation and characterization of nanosized PbS particles inside the mesopore channels of nanoMCM-41 silicate molecular sieves. The encapsulation ...

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A New Strategy To Synthesize Temperature- and pH-Sensitive Multicompartment Block Copolymer Nanoparticles by Two Macro-RAFT Agents Comediated Dispersion Polymerization

21.10.2014 | Pengfei Shi; Quanlong Li; Xin He; Shentong Li; Pingchuan Sun; Wangqing Zhang, Macromolecules, 2014

Multicompartment block copolymer nanoparticles (MCBNs) arouse great interest due to their special structure and wide application. However, synthesis of MCBNs suffers from great inconvenience and difficulty. In this contribution, an efficient strategy to prepare well-defined temperature- and ...

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In‐Situ Confined Growth of Monodisperse Pt Nanoparticle@Graphene Nanobox Composites as Electrocatalytic Nanoreactors

20.10.2014 | Yingying Lv, Yin Fang, Zhangxiong Wu, Xufang Qian, Yanfang Song, Renchao Che, Abdullah M. Asiri, Yongyao Xia, Bo Tu, ..., Small, 2014

Monodisperse Pt nanoparticles (NPs) studded in a three‐dimensional (3D) graphene nanobox are successfully synthesized through a simple in‐situ confined growth route for the first time. The nano‐zeolite A was used as a 3D substrate for in‐situ growth of tri‐layered graphenes on the ...

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A Palladium Nanoparticle–Nanomicelle Combination for the Stereoselective Semihydrogenation of Alkynes in Water at Room Temperature

16.10.2014 | Eric D. Slack, Christopher M. Gabriel, Bruce H. Lipshutz, Angewandte Chemie International Edition, 2014

Abstract The addition of NaBH4 to Pd(OAc)2 in water containing nanomicelles leads to the generation of H2 and Pd nanoparticles. Subsequent reduction of disubstituted alkynes affords Z‐alkenes in high yields. These reactions are general, take place in water at ambient temperatures, and offer ...

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Unexpected Fluorescence of Polyols and PEGylated Nanoparticles Derived from Carbon Dot Formation

16.10.2014 | Hailong Dong, Marcus Roming, Claus Feldmann, Particle & Particle Systems Characterization, 2014

Synthesis of nanoparticles in high‐boiling alcohols (so‐called polyol synthesis) and surface functionalization of nanoparticles with polyethylene glycol (so‐called PEGylation) in combination with certain heating are often accompanied with an intense fluorescence in the blue to green spectral ...

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A Palladium Nanoparticle–Nanomicelle Combination for the Stereoselective Semihydrogenation of Alkynes in Water at Room Temperature

16.10.2014 | Eric D. Slack, Christopher M. Gabriel, Bruce H. Lipshutz, Angewandte Chemie, 2014

Abstract The addition of NaBH4 to Pd(OAc)2 in water containing nanomicelles leads to the generation of H2 and Pd nanoparticles. Subsequent reduction of disubstituted alkynes affords Z‐alkenes in high yields. These reactions are general, take place in water at ambient temperatures, and offer ...

mehr

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