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41.508 Aktuelle Fachpublikationen zum Thema temperature

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04.03.2015 | Sambhu Radhakrishnan; Martin Purino; Konstantinos Alexopoulos; Francis Taulelle; Marie-Francoise Reyniers; Guy B. Ma ..., Green Chemistry, 2015

The etherification of β-citronellene with bioalcohols over zeolite beta was investigated using a heterogeneous catalytic process in liquid phase at an optimum temperature of 80°C. The catalyst exhibits conversions close to 50% for β-citronellene and high selectivity for the etherification ...


Fabrication of ultrathin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device

04.03.2015 | Ramya Ramkumar; Manickam Minakshi, Dalton Transactions, 2015

Ultrathin nanosheet-assembled cobalt molybdate (CoMoO4) with a mesoporous morphology was synthesized by a urea-assisted solution combustion route at a temperature of 400 °C. The as-prepared CoMoO4 was modified using chitosan cross-linked with glutaraldehyde (glu) and employed as a cathode ...


Complex reaction networks in high temperature hydrocarbon chemistry

04.03.2015 | İbrahim Mutlay; Albeiro Restrepo, Physical Chemistry Chemical Physics, 2015

Complex chemical reaction mechanisms of high temperature hydrocarbon decomposition are represented as networks and their underlying graph topologies are analyzed as a dynamic system. As model reactants, 1,3-butadiene, acetylene, benzene, ethane, ethylene, methane, methyl isobutyl ketone (MIBK) ...


Remarkable Distinctions in the Heat-induced Phase Transition Processes of Two Poly(2-isopropyl-2-oxazoline)-based Mixed Aqueous Solutions

03.03.2015 | Tianjiao LI; Hui Tang; peiyi wu, Soft Matter, 2015

Detailed phase transition processes of poly (2-isopropyl-2-oxazoline) (PIPOZ)/ Poly (N-isopropylacrylamide) (PNIPAM) and PIPOZ/ poly (N-vinylcaprolactam) (PVCL) mixtures in aqueous solution were investigated by DSC, temperature-variable 1H-NMR, optical microscopy and FT-IR spectroscopy ...


Oxidation of germa- and stanna-closo-dodecaborate

03.03.2015 | Torben Gädt; Jörg-Alexander Dimmer; Sebastian Fleischhauer; Anita Frank; Claudia Nickl; Tobias Wütz; Klaus Eichele; ..., Dalton Transactions, 2015

The oxidation of closo-heteroborates [GeB11H11]2− and [SnB11H11]2− is presented. Upon oxidation germa-closo-dodecaborate yields a symmetrical dimer exhibiting a Ge–Ge bond between two clusters. This dimer shows sulphur insertion into the Ge–Ge bond at room temperature. In contrast, oxidation of ...


Effects of temperature on the preparation and characteristics hydroxyapatite and their adsorptive properties toward lead

03.03.2015 | Hana EL KHAL; Narjès Batis, New Journal of Chemistry, 2015

Hydroxyapatite (HAp), [Ca10(PO4)6(OH)2] was successfully synthesized by combustion method in the aqueous system containing calcium nitrate, di-ammonium phosphate and urea. The effect of calcination temperatures on composition of the HAp phase was studied using XRD, FTIR, ATD/ATG, and N2 ...


Oxygen nonstoichiometry and thermodynamic characterization of Zr doped ceria in the 1573–1773 K temperature range

03.03.2015 | M. Takacs; J. R. Scheffe; A. Steinfeld, Physical Chemistry Chemical Physics, 2015

This work encompasses the thermodynamic characterization and critical evaluation of Zr4+ doped ceria, a promising redox material for the two-step solar thermochemical splitting of H2O and CO2 to H2 and CO. As a case study, we experimentally examine 5 mol% Zr4+ doped ceria and present oxygen ...


Glassy dynamics of Poly(2-Vinyl-Pyridine) brushes with varying grafting density

02.03.2015 | Nils Neubauer; René Winkler; Martin Tress; Petra Uhlmann; Manfred Reiche; Wycliffe Kipnusu; Friedrich Kremer, Soft Matter, 2015

The molecular dynamics of poly(2-vinyl-pyridine) (P2VP) brushes is measured by Broadband Dielectric Spectroscopy (BDS) in a wide temperature (250K – 440K) and broad spectral (0.1 Hz – 1 MHz) range. This is realized using nanostructured highly conductive silicon electrodes being separated by ...


Mechanism of hydrogen treatment in KTiOPO4 crystals at high temperature: Experimental and first-principles studies

02.03.2015 | Yang Zhang; Yanhua Leng; Jian Liu; Nianjing Ji; Xiulan Duan; Jing Li; Xian Zhao; jiyang wang; Huaidong Jiang, CrystEngComm, 2015

Hydrogen annealing experiments on KTiOPO4 (KTP) crystals with different temperatures, times and hydrogen concentrations were conducted in an atmospheric furnace. Theoretically, in order to analyze the reaction mechanisms of KTP under high temperature hydrogen annealing, the electronic structure, ...


3+1)-Dimensional commensurately modulated structure and photoluminescence properties of diborate KSbOB2O5

02.03.2015 | Dan Zhao; Rong-Hua Zhang; Fei-Fei Li; Juan Yang; Bing-Guo Liu; Yun-Chang Fan, Dalton Transactions, 2015

ingle-crystal of diborate KSbOB2O5 has been prepared under high temperature molten-salt method and its structure has been determined by single crystal X-ray diffraction analysis. Diffraction pattern show strong main reflections and weak satellite reflections, clearly indicating a modulated ...


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