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2.150 Aktuelle Fachpublikationen zum Thema temperature

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High Yield Production of Formate by Hydrogenating CO2 Derived Ammonium Carbamate / Carbonate at Room Temperature

25.03.2015 | Ji Su; Mi Lu; Hongfei Lin, Green Chemistry, 2015

A sustainable economy needs to recycle carbon rather than to irreversibly use stored carbon in fossil fuels. Instead of releasing CO2 into atmosphere, its value can be recognized as a base C1 material for chemicals. In this study, a new CO2 utilization strategy was developed via the hydrogenation ...

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Carbon nanotubes and carbon onions for modification of styrene–acrylate copolymer nanocomposites

21.03.2015 | Remo Merijs‐Meri, Janis Zicans, Tatjana Ivanova, Juris Bitenieks, Alesya Paddubskaya, Polina Kuzhir, Sergey Maksimen ..., Polymer Composites, 2015

Styrene acrylate polymer (SAC) nanocomposites with various carbon nanofillers (multi‐walled carbon nanotubes, MWCNT, and onion like carbons, OLCs, annealed at two different temperatures) are manufactured by means of latex based and combined routes. Concentration of the carbon nanofillers is ...

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Graphene nanoplate and multiwall carbon nanotube–embedded polycarbonate hybrid composites: High electromagnetic interference shielding with low percolation threshold

20.03.2015 | Sandip Maiti, B.B. Khatua, Polymer Composites, 2015

This study has reported the preparation of polycarbonate (PC)/graphene nanoplate (GNP)/multiwall carbon nanotube (MWCNT) hybrid composite by simple melt mixing method of PC with GNP and MWCNT at 330°C above the processing temperature of the PC (processing temperature is 280°C) followed by ...

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Template-Free Electrochemical Synthesis of High Aspect Ratio Sn Nanowires in Ionic Liquids: A General Route to Large-Area Metal and Semimetal Nanowire Arrays?

20.03.2015 | Rihab Al-Salman; Heino Sommer; Torsten Brezesinski; Jürgen Janek, Chemistry of Materials, 2015

A facile low-temperature and template-free synthesis route to high aspect ratio Sn nanowires is described. The nanowires are prepared by electrochemical deposition from SnCl4/ionic liquid solutions containing SiCl4 onto a variety of substrates, including glassy carbon as well as Cu, Al, and Sn ...

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Photon-Impenetrable, Electron-Permeable: The Carbon Nanotube Forest as a Medium for Multiphoton Thermal-Photoemission

19.03.2015 | Mehran Vahdani Moghaddam; Parham Yaghoobi; George A. Sawatzky; Alireza Nojeh, ACS Nano, 2015

Combining the photoelectric and thermionic mechanisms to generate free electrons has been of great interest since the early days of quantum physics as exemplified by the Fowler–DuBridge theory, and recently proposed for highly efficient solar conversion. We present experimental evidence of this ...

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One-Pot Synthesis of Organic Disulfides (Disulfanes) from Alkyl Halides Using Sodium Sulfide Trihydrate and Hexachloroethane or Carbon Tetrachloride in the Poly(ethylene glycol) (PEG-200)

19.03.2015 | Mohammad Abbasi; Mohammad Reza Mohammadizadeh; Hekmat Moosavi; Narges Saeedi, Synlett, 2015

SynlettDOI: 10.1055/s-0034-1380291 Symmetric disulfides are produced by treating their corresponding organic halides including benzylic, allylic, primary and secondary halides with Na2S·3H2O and C2Cl6 or CCl4 in PEG-200 at room temperature in high yields.[...] ©Georg Thieme Verlag Stuttgart · ...

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Synthesis of Ion-Pair Amphiphiles and Calorimetric Study on the Gel to Liquid-Crystalline Phase Transition Behavior of Their Bilayers

18.03.2015 | Wei-Han Lee; Yi-Li Tang; Tzu-Chin Chiu; Yu-Min Yang, Journal of Chemical & Engineering Data, 2015

In this work, nine homologous ion-pair amphiphiles (IPAs) were successfully prepared by the precipitation or ion-exchange methods. This demonstrated the feasibility of designing and synthesizing lipid-like amphiphiles from cheap and abundant single-chained cationic and anionic amphiphiles. The ...

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Synthesis and Growth Mechanism of TiC Whiskers by Carbothermal Reduction of Titania/Microcrystalline Cellulose

17.03.2015 | Huiwen Xiong, Zhiyou Li, Kechao Zhou, Journal of the American Ceramic Society, 2015

TiC whiskers were synthesized by a typical chloride‐assisted carbothermal reduction method using microcrystalline cellulose as a novel carbon source. Unlike previous research, Faceted TiC whiskers on the titanium oxide particles (Ti3O5) were epitaxially grown via vapor–solid mechanism without ...

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Competing Photocurrent Mechanisms in Quasi‐Metallic Carbon Nanotube pn Devices

12.03.2015 | Moh. R. Amer, Shun‐Wen Chang, Stephen B. Cronin, Small, 2015

Photodetectors based on quasi‐metallic carbon nanotubes exhibit unique optoelectronic properties. Due to their small bandgap, photocurrent generation is possible at room temperature. The origin of this photocurrent is investigated to determine the underlying mechanism, which can be ...

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In-situ tryptophan-like fluorometers: assessing turbidity and temperature effects for freshwater applications

11.03.2015 | Kieran Khamis; James Sorensen; Chris Bradley; David Hannah; Daniel J Lapworth; Robert Stevens, Journal of Environmental Monitoring, 2015

Tryptophan-like fluorescence (TLF) is an indicator of human influence on water quality as TLF peaks are associated with the input of labile organic carbon (e.g. sewage or farm waste) and its microbial breakdown. Hence, real-time measurement of TLF could be particularly useful for monitoring water ...

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