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.

scholarly journals Highly Ordered Hybrid Mesoporous Organosilica: An Exceptional Anchor for Pd Nanoparticles and Catalyst Nitroaromatic Reduction

2021 ◽  
Author(s):  
Ali Zebardasti ◽  
Mohammad G. Dekamin ◽  
Esmail Doustkhah
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Room Temperature ◽  
Pd Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Green Catalyst ◽  
Mesoporous Organosilica

Abstract Hybridization of mesoporous organosilica (MO) to reinforce the surface capability in adsorption and stabilization of noble metal nanoparticles are of great attention in generating noble metal-based catalysts. Here, we used a unique hybrid of organic-inorganic mesoporous silica which in pore profile pattern was similar to the well-known mesoporous silica, SBA-15. This hybrid mesoporous silica was further incorporated in the synthesis and stabilization of Pd nanoparticles on its surface and then, the obtained Pd supported MO, was employed as a heterogeneous green catalyst in the conversion of p-nitrophenol (PNP) to p-aminophenol (PAP) at room temperature with efficient recyclability.

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 Hairy silica nanosphere supported metal nanoparticles for reductive degradation of dye pollutants

2021 ◽  
Author(s):  
Xin Chen ◽  
Li Zhang ◽  
Bin Xu ◽  
Tingting Chen ◽  
Lianhong Hu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Heterogeneous Catalysts ◽  
Noble Metal Nanoparticles ◽  
Silica Support ◽  
Dye Pollutants ◽  
Reductive Degradation ◽  
Highly Dispersed ◽  
Supported Metal Nanoparticles ◽  
Silica Nanosphere

Highly dispersed and tiny-sized noble metal nanoparticles are deposited on a hairy poly(4-vinylpyridine)-silica support, which can serve as recyclable heterogeneous catalysts in the reductive degradation of 4-NP and RhB dye pollutants.

scholarly journals Towards the continuous production of Pt-based heterogeneous catalysts using microfluidic systems

2018 ◽  
Vol 47 (5) ◽  
pp. 1693-1702 ◽  
Author(s):  
Uson Laura ◽  
Manuel Arruebo ◽  
Victor Sebastian
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Heterogeneous Catalysts ◽  
Continuous Production ◽  
Noble Metal Nanoparticles ◽  
Microfluidic Systems ◽  
Voc Abatement

The continuous production of Pt-based heterogeneous catalysts based on ultra-small (<2 nm) noble metal nanoparticles deposited on mesoporous ordered silica and their catalytic activity in VOC abatement are here reported. Commercially available micromixers can be easily interfaced to create a multistage platform which allows the growth of metal noble NPs as well as their alloys.

Highly active and stable heterogeneous catalysts based on the entrapment of noble metal nanoparticles in 3D ordered porous carbon

Carbon ◽  
2016 ◽  
Vol 96 ◽  
pp. 75-82 ◽  
Author(s):  
Hui Mao ◽  
Yueyue Shen ◽  
Qian Zhang ◽  
Mani Ulaganathan ◽  
Shilin Zhao ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Porous Carbon ◽  
Heterogeneous Catalysts ◽  
Noble Metal Nanoparticles ◽  
Highly Active ◽  
Ordered Porous

scholarly journals Organotrialkoxysilane-Functionalized Noble Metal Monometallic, Bimetallic, and Trimetallic Nanoparticle Mediated Non-Enzymatic Sensing of Glucose by Resonance Rayleigh Scattering

Biosensors ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 122
Author(s):  
Prem C. Pandey ◽  
Murli Dhar Mitra ◽  
Shubhangi Shukla ◽  
Roger J Narayan
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Metallic Nanoparticles ◽  
Rayleigh Scattering ◽  
Metal Cations ◽  
Pd Nanoparticles ◽  
Glucose Sensing ◽  
Noble Metal Nanoparticles ◽  
Resonance Rayleigh Scattering ◽  
Gold Silver

Organotrialkoxysilanes like 3-aminopropyltrimethoxysilane (3-APTMS)-treated noble metal cations were rapidly converted into their respective nanoparticles in the presence of 3-glycidoxypropylytrimethoxysilane (3-GPTMS). The micellar activity of 3-APTMS also allowed us to replace 3-GPTMS with other suitable organic reagents (e.g., formaldehyde); this approach has significant advantages for preparing bimetallic and trimetallic analogs of noble metal nanoparticles that display efficient activity in many practical applications. The formation of monometallic gold, silver, and palladium nanoparticles, bimetallic Ag-Pd, and Au-Pd nanoparticles at various ratios of noble metal cations, and trimetallic Ag-Au-Pd nanoparticles were studied; their biocatalytic activity in non-enzymatic sensing of glucose based on monitoring synchronous fluorescence spectroscopy (SFS) was assessed. Of these nanoparticles, Au-Pd made with an 80:20 Au:Pd ratio displayed excellent catalytic activity for glucose sensing. These nanoparticles could also be homogenized with Nafion to enhance the resonance Rayleigh scattering (RRS) signal. In this study, the structural characterization of noble metal nanoparticles as well as bi- and tri-metallic nanoparticles in addition to their use in non-enzymatic sensing of glucose are reported.

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