Hierarchical structures based on gold nanoparticles embedded into hollow ceria spheres and mesoporous silica layers with high catalytic activity and stability

2015 ◽  
Vol 39 (12) ◽  
pp. 9372-9379 ◽  
Author(s):  
Yiwei Zhang ◽  
Yuanmei Xu ◽  
Yuming Zhou ◽  
Sanming Xiang ◽  
Xiaoli Sheng ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Hierarchical Structures ◽  
High Catalytic Activity ◽  
Multifunctional Materials ◽  
Silica Layers

CeO2/Au@mSiO2 composite multifunctional materials were synthesized, and this hollow hierarchical catalyst exhibited superior catalytic activity and stability.

Pd colloid grafted mesoporous silica and its extraordinarily high catalytic activity for Mizoroki–Heck reactions

2010 ◽  
Vol 322 (1-2) ◽  
pp. 50-54 ◽  
Author(s):  
Yingjun Feng ◽  
Liang Li ◽  
Yongsheng Li ◽  
Wenru Zhao ◽  
Jinlou Gu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
High Catalytic Activity ◽  
Heck Reactions

Preparation of TiO2-supported twinned gold nanoparticles by CO treatment and their CO oxidation activity

2015 ◽  
Vol 51 (87) ◽  
pp. 15823-15826 ◽  
Author(s):  
Junya Ohyama ◽  
Taiki Koketsu ◽  
Yuta Yamamoto ◽  
Shigeo Arai ◽  
Atsushi Satsuma
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
High Catalytic Activity ◽  
Oxidation Activity

Au/TiO2 prepared by CO treatment showed high catalytic activity for CO oxidation due to twinned structure of Au nanoparticles.

Synthesis of a hollow CeO2/Au/C hierarchical nanostructure for high catalytic activity and recyclability

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100427-100436 ◽  
Author(s):  
Binbin Ding ◽  
Yuming Zhou ◽  
Man He ◽  
Tingyuan Huang ◽  
Shiwei Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hierarchical Structures ◽  
Etching Process ◽  
High Catalytic Activity ◽  
Hierarchical Nanostructure

We report uniform hollow CeO2/Au/C nanocatalysts with hierarchical structures fabricated successfully via an etching process.

Green preparation of hollow mesoporous silica nanosphere inside-loaded gold nanoparticles and the catalytic activity

2017 ◽  
Vol 54 (6) ◽  
pp. 376-381 ◽  
Author(s):  
Miaomiao Li ◽  
Guangpeng Xu ◽  
Yumei Gong ◽  
Wenheng Wang ◽  
Yuanfa Liu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Silica Nanosphere ◽  
Hollow Mesoporous Silica

scholarly journals Preparation of an Active Ni2B/SBA-15 Catalyst to Improve NaBH4 Hydrolysis for Hydrogen Generation

2015 ◽  
Vol 18 (4) ◽  
pp. 231-235
Author(s):  
Fei Wu ◽  
Ting Li ◽  
Jindan Chen ◽  
Xiu Ru Yang ◽  
Cheng Ming Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Hydrogen Generation ◽  
Sintering Temperature ◽  
Weight Ratio ◽  
High Catalytic Activity

Ni2B nanoparticle distributed on ordered SBA-15 mesoporous silica was prepared in situ and its catalytic activity for NaBH4 hydrolysis was investigated in the presented paper. The problem of Ni2B aggregation is resolved and the catalytic activity of Ni2B is also improved due to the effect of SBA-15. The catalytic activity increases with Ni2B/SBA-15 weight ratio increased from 1:4 to 2:1 and the catalyst with Ni2B/SBA-15 weight ratio of 2:1 has high catalytic activity close to that of Ni2B. The sintered experiment shows that the catalytic activity comes from amorphous Ni2B, not crystalline Ni2B. High sintering temperature leads to the conversion from amorphous Ni2B to crystalline Ni2B and damages the nanostructure of amorphous Ni2B framework.

In situ loading of gold nanoparticles on Fe3O4@SiO2 magnetic nanocomposites and their high catalytic activity

Nanoscale ◽  
2013 ◽  
Vol 5 (11) ◽  
pp. 4894 ◽  
Author(s):  
Jinmin Zheng ◽  
Yalei Dong ◽  
Weifeng Wang ◽  
Yanhua Ma ◽  
Jing Hu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Magnetic Nanocomposites ◽  
High Catalytic Activity

Hollow silica nanostructures with small size Au nanoparticles for catalytic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89057-89060 ◽  
Author(s):  
Lin Yao ◽  
Jong-Min Lee
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Au Nanoparticles ◽  
Tetraethyl Orthosilicate ◽  
High Catalytic Activity ◽  
Hollow Silica ◽  
Silica Nanostructures ◽  
Catalytic Applications

Hollow silica nanostructures synthesized using the silica precursors (3-aminopropyl) trimethoxysilane and tetraethyl orthosilicate provide support to small sized gold nanoparticles with a high catalytic activity for the reduction of 4-nitrophenol.

The Relation between Catalytic Activity of CO Oxidation and Support Structure in Oxidation Catalysts using Gold Nanoparticles

2005 ◽  
Vol 900 ◽  
Author(s):  
Shiho Nagano ◽  
Koji Tajiri ◽  
Yutaka Tai
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Preparation Method ◽  
Surface Condition ◽  
Silica Aerogels ◽  
High Catalytic Activity ◽  
Support Materials ◽  
Co Oxidation Reaction ◽  
The Difference

ABSTRACTThiol-passivated gold nanoparticles were adsorbed on several kinds of support materials such as titania-coated silica aerogels and xerogels etc., and then the thiol was removed by heat treatment. The catalytic activity of the prepared composites for CO oxidation reaction was measured, and the effects of the support on the catalytic activity were investigated. Density of the supports, namely, whether aerogel supports or xerogel ones, hardly affected the catalytic activity. It was found that the catalysts having high catalytic activity could be obtained by this preparation method, even using the xerogels as the support. Calcination of the supports before adsorption of the gold nanoparticles affected the activity. The difference of the catalytic activity was observed between the composites with same gold nanoparticle size, so it was considered that the surface condition of the support materials affects the state of gold nanoparticles in composite.

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