نتایج جستجو برای: mixed oxides

تعداد نتایج: 240683  

1999
Peidong Yang Dongyuan Zhao David I. Margolese Bradley F. Chmelka Galen D. Stucky

A simple and general procedure has been developed for the syntheses of ordered largepore (up to 14 nm) mesoporous metal oxides, including TiO2, ZrO2, Nb2O5, Ta2O5, Al2O3, SiO2, SnO2, WO3, HfO2, and mixed oxides SiAlOy, Al2TiOy, ZrTiOy, SiTiOy, ZrW2Oy. Amphiphilic poly(alkylene oxide) block copolymers were used as structure-directing agents in nonaqueous solutions for organizing the network-form...

Journal: :ECS Journal of Solid State Science and Technology 2013

Journal: :Journal of Engineering Research 2023

2016
M. Kosec D. Kolar

Mixed-oxides and the coprecipitation procedure were used to prepare PLZT x/65/35 powders. Transparent samples were obtained by hot-pressing. The influence of processing parameters on the microstructure and electrical properties was studied.

Journal: :Chemical communications 2012
Hongrui Li Dengsong Zhang Phornphimon Maitarad Liyi Shi Ruihua Gao Jianping Zhang Weiguo Cao

Novel 3D flower-like NiMnFe mixed oxides as monolith catalysts prepared by an in situ hydrothermal method show enhanced performance for the selective catalytic reduction of NO with NH(3).

Journal: :Chemical communications 2012
Liang Wang Wei Zhang Dang Sheng Su Xiangju Meng Feng-Shou Xiao

Au nanoparticles with small sizes (1-4 nm) were effectively formed on Mg-Al mixed oxides (Au/MAO), which showed superior catalytic performances and good recyclability in aerobic homocoupling of phenylboronic acid.

2010
A. A. Refaat

Biodiesel production is worthy of continued study and optimization of production procedures due to its environmentally beneficial attributes and its renewable nature. Heterogeneous transesterification is considered to be a green process. The process requires neither catalyst recovery nor aqueous treatment steps and very high yields of methyl esters can be obtained, close to the theoretical valu...

2016
W. Daniell N. Lloyd C. Bailey P. Harrison

Mixed copper-cerium oxides were prepared by two methods leading to different wpper species in the as-prepared material. At the catalyst operating temperature (300400°C) and above, the same copper species was present irrespective of the prepration technique. A solid solution having the same fluorite structure as that of pure CeQ was formed and remained stable after calcination to 100O0C. At temp...

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