Synthesis and Characterization of Nano Titania Powder with High Photoactivity for Gas-Phase Photo-oxidation of Benzene from TiOCl2Aqueous Solution at Low Temperatures

Langmuir ◽  
2004 ◽  
Vol 20 (25) ◽  
pp. 10838-10844 ◽  
Author(s):  
Yuanzhi Li ◽  
Nam-Hee Lee ◽  
Doo-Sun Hwang ◽  
Jae Sung Song ◽  
Eun Gu Lee ◽  
...  
Keyword(s):  
Gas Phase ◽  
Low Temperatures ◽  
Synthesis And Characterization ◽  
Photo Oxidation ◽  
Titania Powder ◽  
Oxidation Of Benzene

Synthesis and Characterization of Cl2HSi-O-NMe2

2004 ◽  
Vol 59 (11-12) ◽  
pp. 1505-1511 ◽  
Author(s):  
Krunoslav Vojinović ◽  
Norbert W. Mitzel ◽  
Thomas Foerster ◽  
W. H. Rankin
Keyword(s):  
Gas Phase ◽  
Reasonable Agreement ◽  
Synthesis And Characterization ◽  
Gauche Conformer ◽  
Anti Conformer ◽  
Donor And Acceptor ◽  
Multinuclear Nmr Spectroscopy ◽  
Repulsive Forces ◽  
Gas Phase Electron Diffraction

O-(Dichlorosilyl)-N,N-dimethylhydroxylamine, Cl2HSiONMe2, was synthesised by the reaction of O-lithio-N,N-dimethylhydroxylamine with an excess of trichlorosilane. The compound was characterised by multinuclear NMR spectroscopy (1H, 13C, 15N, 29Si), gas-phase IR spectroscopy and mass spectrometry. The structure of Cl2HSiONMe2 was determined by gas-phase electron diffraction. It exists as two conformers in the vapour, named anti and gauche after the position of the SiH hydrogen atom relative to the SiON skeleton. The anti:gauche ratio in the vapour was determined to be 40:60. The anti conformer shows only a weak attractive interaction between the geminal donor and acceptor centres N and Si [angle Si-O-N 111.1(20)­°], whereas these interactions are stronger in the gauche conformer [angle Si-O-N 98.8(12)°]. Further structure-determining forces from weak hydrogen bridges of the Si-Cl ···H-C type and van der Waals repulsive forces are also discussed. The experimental results are in reasonable agreement with ab initio calculations at the MP2/6-311++G** level of theory.

Synthesis and Characterization of Ruteno-Cuprates by Solid State Reactions

2008 ◽  
Vol 591-593 ◽  
pp. 644-648
Author(s):  
J.M.A. Gimenez ◽  
Carlos Roberto Grandini ◽  
A.R. Jurelo
Keyword(s):  
Solid State ◽  
Low Temperatures ◽  
Magnetic Transition ◽  
Solid State Reactions ◽  
Synthesis And Characterization ◽  
Superconducting Properties ◽  
New Class ◽  
Preparation Conditions ◽  
Magnetic States

A new class of hybrid ruteno-cuprates – such as Ru-1212 and Ru-1222 – was discovered in 1995 by Bauerfeind and collaborators. These materials present superconducting and magnetic states at low temperatures, an atypical duality in other superconductors. The superconductivity is more easily observed in Ru-1222, while Ru-1212 is a more problematic case, due to the strong effects of the preparation details in its superconducting properties, becoming the material superconductor or not. Ru-1212 presents a critical temperature that can vary between 0 and 46 K, depending on the preparation conditions, and a temperature of magnetic transition of around 132 K. The samples were prepared through solid state reactions, by using a mixture of high purity powders, followed by calcination and sinterization in the nitrogen and oxygen atmospheres. This paper shows the preparation process of Ru-1212 samples, followed by their structural and magnetic characterization.

Synthesis and characterization of chromium silicate catalyst and its application in the gas phase glycerol transformation into acetaldehyde

2020 ◽  
Vol 112 ◽  
pp. 107710 ◽  
Author(s):  
Roberto A. Luizon Filho ◽  
Luiz G. Possato ◽  
Oscar A.N. Santisteban ◽  
Adriano de Vasconcellos ◽  
Danilo A. da Silva ◽  
...  
Keyword(s):  
Gas Phase ◽  
Synthesis And Characterization

scholarly journals Synthesis and characterization of some nanostructured composite oxides for low temperature catalytic combustion of dilute propane

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 27863-27871 ◽  
Author(s):  
C. Doroftei ◽  
L. Leontie
Keyword(s):  
Low Temperatures ◽  
Catalytic Combustion ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Synthesis And Characterization ◽  
Propane Combustion ◽  
Nanostructured Composite ◽  
Composite Oxides ◽  
Combustion Technique

Five nanosized perovskite and four ferrospinel powders were prepared by sol–gel self-combustion technique. The La0.6Pb0.2Mg0.2MnO3 perovskite was found to exhibit the best catalytic performance with respect to propane combustion at low temperatures.

Synthesis and characterization of nanosized titanium particles by gas-phase combustion

2004 ◽  
Vol 375-377 ◽  
pp. 609-614 ◽  
Author(s):  
Duck-Young Maeng ◽  
Chang-Kyu Rhee ◽  
Kyeong-Ho Kim ◽  
Whung-Whoe Kim
Keyword(s):  
Gas Phase ◽  
Synthesis And Characterization

scholarly journals Synthesis and Characterization of Titanium Supported on High Order Nanoporous Silica and Application for Direct Oxidation of Benzene to Phenol

2009 ◽  
Vol 6 (s1) ◽  
pp. S324-S328 ◽  
Author(s):  
Alireza Badiei ◽  
Javad Gholami ◽  
Yeganeh Khaniani
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Liquid Phase ◽  
Maximum Yield ◽  
Synthesis And Characterization ◽  
Nanoporous Silica ◽  
Radical Mechanism ◽  
Direct Oxidation ◽  
Oxidation Of Benzene

Direct oxidation of benzene to phenol in liquid phase by H2O2peroxide was examined over Ti/ LUS-1 catalyst in methanol and acetic acid as solvents. The maximum yield and selectivity of the phenol produced was obtained in the presence of acetic acid. It can be attributed to the stabilization of H2O2as peroxy acetic acid species in the radical mechanism for this reaction. Acetic acid interacts with hydrogen peroxide over Ti/LUS-1 and produces acetoxy radicals.

Gas-Phase Reactions of Molecular Oxygen with Uranyl(V) Anionic Complexes—Synthesis and Characterization of New Superoxides of Uranyl(VI)

2015 ◽  
Vol 119 (15) ◽  
pp. 3628-3635 ◽  
Author(s):  
Ana F. Lucena ◽  
José M. Carretas ◽  
Joaquim Marçalo ◽  
Maria C. Michelini ◽  
Yu Gong ◽  
...  
Keyword(s):  
Gas Phase ◽  
Molecular Oxygen ◽  
Synthesis And Characterization ◽  
Gas Phase Reactions ◽  
Anionic Complexes

Synthesis and Characterization of Hollow Core-Shell ZrO2@void@BiVO4 Visible-Light Photocatalyst

2010 ◽  
Vol 148-149 ◽  
pp. 1331-1338
Author(s):  
Bing Hua Yao ◽  
Liu Min ◽  
Zhan Ying Ma ◽  
Cheng Wang
Keyword(s):  
Photocatalytic Activity ◽  
Gas Phase ◽  
Carbon Layer ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Hollow Core ◽  
Void Space ◽  
Visible Light Photocatalyst ◽  
Pure Phase

Monoclinic scheelite BiVO4 was synthesized from a mixture of aqueous Bi(NO3)3 and NH4VO3 solutions by hydrothermal method. Then using successive coating of BiVO4 with a carbon layer and a ZrO2 layer followed by heat treatment to remove the carbon layer prepared a core-shell(ZrO2@void@BiVO4) nanoparticles with a void layer between the BiVO4 core and the ZrO2 shell. TG-DTA and IR suggest that BiVO4 was coated with ZrO2. TEM shows that there was a void space between the BiVO4 core and the ZrO2 shell. The samples were characterized by XRD and the peaks of ZrO2@void@BiVO4 suits well with the pure phase monoclinic scheelite BiVO4. And its visble-light photocatalytic activity was evaluated by the photodegradation of methylene blue(MB). The results indicated that the photocatalytic activity of ZrO2@void@BiVO4 is similar to that of pure phase BiVO4, which makes it can be used for preparing liquid-gas phase boundary visble-light photocatalyst.

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