scholarly journals Chiral Nanoparticles: Chirality of Metal Nanoparticles in Chiral Mesoporous Silica (Adv. Funct. Mater. 18/2012)

2012 ◽  
Vol 22 (18) ◽  
pp. 3750-3750 ◽  
Author(s):  
Junjie Xie ◽  
Yingying Duan ◽  
Shunai Che
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles

Graphene-Supported Ultrafine Metal Nanoparticles Encapsulated by Mesoporous Silica: Robust Catalysts for Oxidation and Reduction Reactions

2013 ◽  
Vol 126 (1) ◽  
pp. 254-258 ◽  
Author(s):  
Lu Shang ◽  
Tong Bian ◽  
Baihui Zhang ◽  
Donghui Zhang ◽  
Li-Zhu Wu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Reduction Reactions ◽  
Ultrafine Metal

Architecture of yolk–shell structured mesoporous silica nanospheres for catalytic applications

2018 ◽  
Vol 47 (27) ◽  
pp. 9072-9078 ◽  
Author(s):  
Xue Wang ◽  
Yapeng He ◽  
Yali Ma ◽  
Junmin Liu ◽  
Yunling Liu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Selective Etching ◽  
Noble Metal Nanoparticles ◽  
Silica Nanospheres ◽  
Periodic Mesoporous Organosilica ◽  
Mesoporous Organosilica ◽  
Catalytic Applications ◽  
Mesoporous Silica Nanospheres

We report the design and realization of yolk–shell structured nanospheres with periodic mesoporous organosilica (PMO) nanospheres or noble metal nanoparticles encapsulated in mesoporous silica shellsviaa selective etching method.

scholarly journals Mesoporous Silica Nanosheets with Tunable Pore Lengths Supporting Metal Nanoparticles for Enhanced Hydrogenation Reactions

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 12 ◽  
Author(s):  
Xiaohui Wang ◽  
Xin Ding ◽  
Houbing Zou
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Hydrogenation Reaction ◽  
Silica Layer ◽  
Active Components ◽  
Short Channel ◽  
Wide Range ◽  
Hydrogenation Reactions ◽  
Channel Lengths

The channel lengths of mesoporous materials have a crucial impact on the catalytic performances of as-loaded active components. However, it remains a challenge to precisely tune the mesochannel length in a wide range from ≤50 nm to 200 nm. In this paper, we developed a top-down strategy, that is to say, crushing hollow microspheres, for preparing mesoporous silica nanosheets (MSSs) with perpendicular mesochannels and tunable thicknesses. Owing to the heterogeneous growth of the mesoporous silica layer on the surfaces of polystyrene microspheres (hard template), it was achieved to regulate the mesochannel length continuously in the range of 20–200 nm. The obtained materials were characterized by X-ray diffraction (XRD), nitrogen sorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of channel lengths on the catalytic activity of metal nanoparticles was then investigated in the selective hydrogenation reaction of nitroarenes. It was found that a short channel not only favored dispersing metal nanoparticles uniformly and then avoiding pore blocking, but also improved the accessibility of metal nanoparticles largely during reactions.

scholarly journals The Isocyanurate-Carbamate-Bridged Hybrid Mesoporous Organosilica: An Exceptional Anchor for Pd Nanoparticles and a Unique Catalyst for Nitroaromatics Reduction

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 621
Author(s):  
Ali Zebardasti ◽  
Mohammad G. Dekamin ◽  
Esmail Doustkhah
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Room Temperature ◽  
Heterogeneous Catalysts ◽  
Pd Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Green Catalyst ◽  
Mesoporous Organosilica ◽  
Mesoporous Organosilicas

Hybridisation of mesoporous organosilicas (MO) to reinforce the surface capability in adsorption and stabilisation of noble metal nanoparticles is of great attention in generating/supporting noble metal within their matrices and transforming them into efficient heterogeneous catalysts. Here, we used a unique hybrid of organic-inorganic mesoporous silica in which pore profile pattern was similar to the well-known mesoporous silica, SBA-15 for catalysis. This hybrid mesoporous organosilica was further engaged as a support in the synthesis and stabilisation of Pd nanoparticles on its surface, and then, the obtained Pd-supported MO was employed as a heterogeneous green catalyst in the conversion of aqueous p-nitrophenol (PNP) to p-aminophenol (PAP) at room temperature with efficient recyclability.

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