Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO + NO Reaction

2010 ◽  
Vol 22 (17) ◽  
pp. 4879-4889 ◽  
Author(s):  
Xun Li ◽  
Changjin Tang ◽  
Man Ai ◽  
Lin Dong ◽  
Zheng Xu
Keyword(s):  
Rare Earth ◽  
Hollow Spheres ◽  
Catalytic Performance ◽  
Controllable Synthesis ◽  
Porous Shell ◽  
Pure Phase

Controllable synthesis of Ni/SiO2 hollow spheres and their excellent catalytic performance in 4-nitrophenol reduction

2014 ◽  
Vol 43 (44) ◽  
pp. 16911-16918 ◽  
Author(s):  
Zhongyi Niu ◽  
Shenghuan Zhang ◽  
Yanbo Sun ◽  
Shili Gai ◽  
Fei He ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hollow Spheres ◽  
Catalytic Performance ◽  
Hollow Microspheres ◽  
Controllable Synthesis ◽  
Step Method ◽  
Nitrophenol Reduction ◽  
Excellent Catalytic Performance

Hierarchical Ni nanoparticle supported silica hollow microspheres were synthesized by a unique and simple two-step method. Excellent catalytic activity in the reduction of 4-nitrophenol can be achieved on the catalysts.

Controllable Synthesis and Catalytic Performance of Nanocrystals of Rare-Earth-Polyoxometalates

2018 ◽  
Vol 57 (11) ◽  
pp. 6624-6631 ◽  
Author(s):  
Shujun Li ◽  
Yanfang Zhou ◽  
Qingpo Peng ◽  
Ruoya Wang ◽  
Xiaoge Feng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Catalytic Performance ◽  
Controllable Synthesis

Catalytic performance in methane combustion of rare-earth perovskites RECo0.50Mn0.50O3 (RE: La, Er, Y)

2011 ◽  
Vol 172 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Gina Pecchi ◽  
Claudia Campos ◽  
Octavio Peña
Keyword(s):  
Rare Earth ◽  
Methane Combustion ◽  
Catalytic Performance

Size-controllable synthesis and photocatalytic performance of ZnO hollow spheres

2015 ◽  
Vol 40 ◽  
pp. 713-719 ◽  
Author(s):  
Jinghai Yang ◽  
Xiangwang Kong ◽  
Wenlong Jiang ◽  
Jian Cao ◽  
Ping Zou ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Hollow Spheres ◽  
Controllable Synthesis ◽  
Zno Hollow Spheres

Fabrication of Hollow Silica-Alumina Composite Spheres Using L(+)-Arginine and their Catalytic Performance for Hydrolytic Dehydrogenation of Ammonia Borane

2014 ◽  
Vol 617 ◽  
pp. 170-173
Author(s):  
Tetsuo Umegaki ◽  
Shunsuke Imamura ◽  
Naoki Toyama ◽  
Qiang Xu ◽  
Yoshiyuki Kojima
Keyword(s):  
High Activity ◽  
Sol Gel ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Ammonia Borane ◽  
Catalytic Performance ◽  
Hollow Silica ◽  
Silica Alumina ◽  
Alumina Composite ◽  
Composite Walls

The present study reports a facile and effective approach for fabrication of hollow silica-alumina composite spheres. In this approach, silica-alumina composite walls were coated on polystyrene template by the sol-gel method using L(+)-arginine as a promoter for the reaction followed by calcination procedure. Using L(+)-arginine as a promoter of coating process, homogeneous hollow silica-alumina composite spheres are obtained and the wall thickness is larger than that of the hollow spheres prepared with ammonia. The hollow spheres shows high activity for hydrolytic dehydrogenation of ammonia borane compared with spherical silica-alumina composite particles without hollow structure, the hollow spheres prepared with ammonia, and conventional H-BEA zeolite. The results indicate that hollow structure plays important role to show high activity.

Hierarchical flower-like Bi2WO6 hollow microspheres: facile synthesis and excellent catalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 23080-23085 ◽  
Author(s):  
Peigen Zhang ◽  
Jian Zhang ◽  
Anjian Xie ◽  
Shikuo Li ◽  
Jiming Song ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Catalytic Performance ◽  
Hollow Microspheres ◽  
Solvothermal Process ◽  
Facile Synthesis ◽  
Step Method ◽  
Bismuth Tungstate ◽  
One Step ◽  
Excellent Catalytic Performance

A one step method has been developed for the fabrication of hierarchical flower-like bismuth tungstate (Bi2WO6) hollow spheres via a solvothermal process.

scholarly journals Dehydration of Biomass-Derived Butanediols over Rare Earth Zirconate Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1392
Author(s):  
Asami Matsuda ◽  
Yoshitaka Matsumura ◽  
Kazuki Nakazono ◽  
Fumiya Sato ◽  
Ryoji Takahashi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Flow Reactor ◽  
Rare Earth Metals ◽  
Fluorite Structure ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Heavy Rare Earth ◽  
High Crystallinity ◽  
Unsaturated Alcohols ◽  
Selective Formation

The aim of this work is to develop an effective catalyst for the conversion of butanediols, which is derivable from biomass, to valuable chemicals such as unsaturated alcohols. The dehydration of 1,4-, 1,3-, and 2,3-butanediol to form unsaturated alcohols such as 3-buten-1-ol, 2-buten-1-ol, and 3-buten-2-ol was studied in a vapor-phase flow reactor over sixteen rare earth zirconate catalysts at 325 °C. Rare earth zirconates with high crystallinity and high specific surface area were prepared in a hydrothermal treatment of co-precipitated hydroxide. Zirconates with heavy rare earth metals, especially Y2Zr2O7 with an oxygen-defected fluorite structure, showed high catalytic performance of selective dehydration of 1,4-butanediol to 3-buten-1-ol and also of 1,3-butanediol to form 3-buten-2-ol and 2-buten-1-ol, while the zirconate catalysts were less active in the dehydration of 2,3-butanediol. The calcination of Y2Zr2O7 significantly affected the catalytic activity of the dehydration of 1,4-butanediol: a calcination temperature of Y2Zr2O7 at 900 °C or higher was efficient for selective formation of unsaturated alcohols. Y2Zr2O7 with high crystallinity exhibits the highest productivity of 3-buten-1-ol from 1,4-butanediol at 325 °C.

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