A facile approach to fabricate halloysite/metal nanocomposites with preformed and in situ synthesized metal nanoparticles: a comparative study of their enhanced catalytic activity

2015 ◽  
Vol 44 (19) ◽  
pp. 8906-8916 ◽  
Author(s):  
Sankar Das ◽  
Subhra Jana
Keyword(s):  
Catalytic Activity ◽  
Comparative Study ◽  
Metal Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Cost Effective ◽  
Environmentally Benign ◽  
Metal Nanocomposites

Halloysite/metal nanocomposites have been synthesized through the immobilization of preformed and in situ synthesized metal nanoparticles over halloysite surfaces, which in turn produce efficient, cost-effective, and environmentally benign heterogeneous catalysts.

In situ synthesis of environmentally benign montmorillonite supported composites of Au/Ag nanoparticles and their catalytic activity in the reduction of p-nitrophenol

RSC Advances ◽  
2014 ◽  
Vol 4 (105) ◽  
pp. 61114-61123 ◽  
Author(s):  
Biswajoy Bagchi ◽  
Pradip Thakur ◽  
Arpan Kool ◽  
Sukhen Das ◽  
Papiya Nandy
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Ag Nanoparticles ◽  
In Situ Synthesis ◽  
Montmorillonite Clay ◽  
Environmentally Benign

Montmorillonite clay supported in situ synthesized metal nanoparticles with catalytic activity was provided.

In situ synthesis and catalytic activity in CO oxidation of metal nanoparticles supported on porous nanocrystalline silicon

2010 ◽  
Vol 36 (22) ◽  
pp. 63-70
Author(s):  
Sergej Polisski ◽  
Bernhard Goller ◽  
Karen Wilson ◽  
Dmitry Kovalev ◽  
Vladimir Zaikowskii ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Metal Nanoparticles ◽  
Nanocrystalline Silicon ◽  
In Situ Synthesis

scholarly journals Heterogeneization of alpha diimines nickel catalysts for the polymerization of ethylene and methylmethacrylate

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Inês Matos ◽  
Auguste Fernandes ◽  
Rita Catalão ◽  
Ana M. Botelho do Rego ◽  
José R. Ascenso ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Cation ◽  
Organometallic Compound ◽  
Heterogeneous Catalysts ◽  
Active Catalyst ◽  
Organic Ligand ◽  
Nickel Catalysts ◽  
Organometallic Complex ◽  
The One

AbstractIn this paper we present two different techniques for the preparation of single site heterogeneous catalyst. The first method consists in the impregnation of a solution of the organometallic compound in MCM41. The second method intends to establish the in situ synthesis of the complex within the solid’s pores by the reaction of the organic ligand with the metal cation previously introduced in the support. The direct deposition of the organometallic complex in the support resulted in an active catalyst which gives polyethylene with the same microstructure as the one obtained with the related homogeneous systems. The heterogeneous catalysts obtained by reaction of the ligand with the metal already present in the support showed a lower catalytic activity.

Thermosensitive Core-Shell Microgel as a “Nanoreactor” for Metal Nanoparticles

2009 ◽  
Vol 1234 ◽  
Author(s):  
Yan Lu ◽  
Matthias Ballauff
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Catalytic Reduction ◽  
Core Shell ◽  
Carrier System ◽  
Volume Transition ◽  
Oxidation Of Alcohols ◽  
Influence Of Temperature On ◽  
Metal Nanocomposites

AbstractIn our study, thermosensitive core-shell microgel particles have been used as the carrier system for the deposition of metal nanoparticles, in which the core consists of polystyrene (PS) whereas the shell consists of poly(N-isopropylacrylamide) (PNIPA) network crosslinked by N, N'-methylenebisacrylamide (BIS). Silver, gold and palladium nanoparticles have been homogeneously embedded into thermosensitive PNIPA-networks, respectively. We demonstrate that the catalytic activity of the microgel-metal nanocomposites can be tuned by the volume transition within the microgel of these systems by using the catalytic reduction of 4-nitrophenol as the model reaction. Moreover, following the concept of a “green chemistry”, the oxidation of alcohols to the corresponding aldehydes or ketones can be carried out in aqueous solution under aerobic conditions at room temperature by using microgel-metal nanocomposites as the catalyst. The influence of temperature on the catalytic activity has been also investigated, which will be affected both by the volume transition of the microgel and by the change of polarity of the microgel in this case.

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.

In situ synthesis and catalytic activity in CO oxidation of metal nanoparticles supported on porous nanocrystalline silicon

2010 ◽  
Vol 271 (1) ◽  
pp. 59-66 ◽  
Author(s):  
Sergej Polisski ◽  
Bernhard Goller ◽  
Karen Wilson ◽  
Dmitry Kovalev ◽  
Vladimir Zaikowskii ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Metal Nanoparticles ◽  
Nanocrystalline Silicon ◽  
In Situ Synthesis

Manganese oxides with hierarchical structures derived from coordination polymers and their enhanced catalytic activity at low temperature for selective catalytic reduction of NOx

2019 ◽  
Vol 48 (43) ◽  
pp. 16395-16401 ◽  
Author(s):  
Byeonggab Ji ◽  
Junhyung Lee ◽  
Seung-Yeop Kwak
Keyword(s):  
Catalytic Activity ◽  
Coordination Polymer ◽  
Manganese Oxides ◽  
Preparation Method ◽  
Catalytic Reduction ◽  
Hierarchical Structures ◽  
Cost Effective ◽  
Catalytic Performance ◽  
Environmentally Benign ◽  
Reduction Of Nox

Hierarchical manganese oxides for enhancing catalytic performance have been successfully synthesized via simple thermal annealing manganese coordination polymer, which is a facile, cost-effective, and environmentally benign preparation method.

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