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Ga-MCM-41 nanoparticles: Synthesis and application of versatile heterogeneous catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
54691 47020 2014 9 PDF Available
Title
Ga-MCM-41 nanoparticles: Synthesis and application of versatile heterogeneous catalysts
Abstract

•Ga-MCM-41 can be prepared in the form of nanoparticles (<150 nm, XS-Ga-MCM-41).•Ga-MCM-41 nanoparticles present high specific surface area.•XS-Ga-MCM-41-H is a versatile and reusable heterogeneous catalyst.•XS-Ga-MCM-41-H reaches higher TON compared to conventional Ga-MCM-41.

Ga-MCM-41 materials with nanosized particles (<150 nm) were prepared according to two new synthesis methods. The structural and textural properties of the materials were characterized by XRD, N2-physisorption, TEM, SEM and EDX, while 71Ga MAS-NMR was employed to monitor the coordination of the gallium atoms. The two materials were tested as heterogeneous catalysts in three relevant reactions in the context of green production of valuable chemicals: (1) the reaction of glycerol with acetone to produce solketal; (2) the conversion of the triose sugar dihydroxyacetone to ethyl lactate; (3) the epoxidation of cyclooctene with aqueous hydrogen peroxide. The two nanosized Ga-MCM-41 materials show different catalytic behaviour in the various reactions, with the material prepared with lower Si/Ga displaying a higher versatility. This catalyst reaches higher turnover numbers compared to conventional Ga-MCM-41 reported in the literature. This result is ascribed to the higher specific surface area and to the shorter channels of the nanoparticles, which enhance the accessibility of the active sites.

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Keywords
Ga-MCM-41; Nanoparticles; Heterogeneous catalyst; Glycerol; Lactate; Epoxidation
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Ga-MCM-41 nanoparticles: Synthesis and application of versatile heterogeneous catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 235, 15 October 2014, Pages 184–192
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us