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46.138 Aktuelle Fachpublikationen zum Thema temperature

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A Facile Synthesis of Pure O2PtF6

28.08.2015 | Stefan S. Rudel, Florian Kraus, Zeitschrift für anorganische und allgemeine Chemie, 2015

Abstract A new and facile synthesis of O2PtF6 is reported without the demanding synthesis of PtF6 or the use of high pressure fluorination in the presence of oxygen. The O2PtF6 is obtained in form of single crystals by direct Klemm‐type fluorination of commercially available PtO2·xH2O in a ...

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Rheological Characterization of pH‐Responsive Carboxymethyl Starch/β‐Cyclodextrin Microgels

28.08.2015 | Bao Zhang, Jie Long, Qiutao Xie, Yaoqi Tian, Xueming Xu, Zhengyu Jin, Starch - Stärke, 2015

Carboxymethyl starch (CMS)/β‐cyclodextrin (β‐CD) microgels with pH and ionic strength sensitivities have been synthesized by chemical crosslinking. The characterization of microgels was investigated by thermogravimetric analysis, zeta potential measurements, swelling, and rheological analyses. ...

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A Highly Stable and Magnetically Recyclable Nanocatalyst System: Mesoporous Silica Spheres Embedded with FeCo/Graphitic Shell Magnetic Nanoparticles and Pt Nanocatalysts

28.08.2015 | Da Jeong Kim, Yan Li, Yun Jin Kim, Nam Hwi Hur, Won Seok Seo, Chemistry - An Asian Journal, 2015

We have developed a highly stable and magnetically recyclable nanocatalyst system for alkene hydrogenation. The materials are composed of mesoporous silica spheres (MSS) embedded with FeCo/graphitic shell (FeCo/GC) magnetic nanoparticles and Pt nanocatalysts (Pt‐FeCo/GC@MSS). The Pt‐FeCo/GC@MSS ...

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Chemically Modulated Band Gap in Bilayer Graphene Memory Transistors with High On/Off Ratio

28.08.2015 | Si Young Lee; Dinh Loc Duong; Quoc An Vu; Youngjo Jin; Philip Kim; Young Hee Lee, ACS Nano, 2015

We report a chemically conjugated bilayer graphene field effect transistor demonstrating a high on/off ratio without significant degradation of the on-current and mobility. This was realized by introducing environmentally stable benzyl viologen as an electron-donating group and atmospheric ...

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Absorption Performance and Mechanism of CO2 in Aqueous Solutions of Amine-Based Ionic Liquids

28.08.2015 | Pengcheng Hu; Rui Zhang; Zhichang Liu; Haiyan Liu; Chunming Xu; Xianghai Meng; Meng Liang; Shuangshuang Liang, Energy & Fuels, 2015

Several amine-based ionic liquids (ILs) were synthesized via a one-step method using low-priced organic amines and inorganic acids, and they were mixed with water to form new CO2 absorbents. The effects of the ionic structure, IL concentration, temperature, and pressure on the CO2 absorption ...

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Thermal Stability of Sulfonated Poly(Ether Ether Ketone) Films: on the Role of Protodesulfonation

27.08.2015 | Beata T. Koziara, Emiel J. Kappert, Wojciech Ogieglo, Kitty Nijmeijer, Mark A. Hempenius, Nieck E. Benes, Macromolecular Materials and Engineering, 2015

Thin film and bulk, sulfonated poly(ether ether ketone) (SPEEK) have been subjected to a thermal treatment at 160–250 °C for up to 15 h. Exposing the films to 160 °C already causes partial desulfonation, and heating to temperatures exceeding 200 °C results in increased conjugation in the ...

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Recovery of Flavonoids from Walnuts De‐Pellicle Wastewater with Macroporous Resins and Evaluation of Antioxidant Activities In Vitro

27.08.2015 | Yaxin Zhu, Hao Song, Xu Zhang, Chaoyin Chen, Shenglan Zhao, Feng Ge, Diqiu Liu, Journal of Food Process Engineering, 2015

Abstract Walnut de‐pellicle wastewater is rich in polyphenols and flavonoids that are significant to resource and environment. Enrichment and purification of flavonoids from walnut de‐pellicle wastewater were investigated by five macroporous resins. As static tests shown, AB‐8 resin was the ...

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A reversed‐phase compatible thin‐layer chromatography autography for the detection of acetylcholinesterase inhibitors

27.08.2015 | I. Ayelen Ramallo, Paula García, Ricardo L. E. Furlan, Journal of Separation Science, 2015

A dual readout autographic assay to detect acetylcholinesterase inhibitors present in complex matrixes adsorbed on reversed phase or normal phase thin layer chromatography plates is described. Enzyme gel entrapment with an amphiphilic copolymer was used for assay development. The effects of ...

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Nano “Chocolate Waffle” for near‐IR Responsive Drug Releasing System

27.08.2015 | Junseok Lee, Hansoo Park, Won Jong Kim, Small, 2015

A majority of the photo‐responsive drug‐delivery systems that are currently being studied require a complicated synthesis method. Here, we prepare a near‐infrared responsive, photothermally controllable, drug‐delivery carrier by a simple mixing and extraction process without the incorporation of ...

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ChemInform Abstract: Iron Carbide Nanoparticles Encapsulated in Mesoporous Fe‐N‐Doped Carbon Nanofibers for Efficient Electrocatalysis.

27.08.2015 | Zhen‐Yu Wu, Xing‐Xing Xu, Bi‐Cheng Hu, Hai‐Wei Liang, Yue Lin, Li‐Feng Chen, Shu‐Hong Yu, ChemInform, 2015

Abstract A new catalyst for the oxygen reduction reaction in fuel cells and metal—air batteries is prepared from aqueous solutions of carbonaceous nanofibers, pyrrole, and FeCl3 (room temperature, 4 h, followed by pyrolysis under flowing N2).

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