Silica-Based Molecular Sieves in Sustainable Chemistry

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Environmental Nanoscience and Nanotechnology".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 3286

Special Issue Editor


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Guest Editor
Université de Haute-Alsace, CNRS, Institut de Science des Matériaux de Mulhouse (IS2M), Axe Matériaux à Porosité Contrôlée (MPC), UMR 7361, F-68100 Mulhouse, France
Interests: zeolite; metallophosphates; synthesis; adsorption of pollutants; valorization of by-products and waste; zeolite/polymer composites; 3D printing

Special Issue Information

Dear Colleagues,

To face the global challenges concerning sustainability issues arising from rapid industry development and population increase, many efforts have been made to develop new silicon based molecular sieves and technologies toward environmental improvement.  Methods of producing these porous materials eco-friendly have attracted much attention recently. The exploitation of renewable raw material sources, the recovery of waste/by-products, the development of products synthesis by means of soft chemistry opens up vast opportunities.

Silicon based molecular sieves have also been investigated in energy storage processes and they are also finding promising applications in many sustainable processes including as catalyst.

The purpose of the present Special Issue is to collect state-of-the-art work on silicon based molecular sieves as potential solutions to the sustainability issues but also on their green and efficient production. Review articles or research papers dealing the synthesis, properties and applications are solicited and welcomed.

Prof. Dr. Angélique Simon-Masseron
Guest Editor

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Keywords

  • Soft chemistry
  • Sustainable processes
  • Waste recycling
  • By-products valorization
  • Water purification
  • Air-pollution remediation
  • Energy storage
  • Biomass conversion
  • CO2 capture and conversion

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Published Papers (1 paper)

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Research

20 pages, 5049 KiB  
Article
Propylsulfonic Acid-Functionalized Mesostructured Natural Rubber/Silica Nanocomposites as Promising Hydrophobic Solid Catalysts for Alkyl Levulinate Synthesis
by Supphathee Chaowamalee, Ning Yan and Chawalit Ngamcharussrivichai
Nanomaterials 2022, 12(4), 604; https://doi.org/10.3390/nano12040604 - 11 Feb 2022
Cited by 18 | Viewed by 2737
Abstract
Organosulfonic acid-functionalized mesoporous silica is a class of heterogeneous acid catalysts used in esterification processes due to its high surface area, shape-selective properties, and strongly acidic sites. Since water is generated as a by-product of esterification, the surface of mesostructured silica is modified [...] Read more.
Organosulfonic acid-functionalized mesoporous silica is a class of heterogeneous acid catalysts used in esterification processes due to its high surface area, shape-selective properties, and strongly acidic sites. Since water is generated as a by-product of esterification, the surface of mesostructured silica is modified to enhance hydrophobicity and catalytic performance. In this study, a series of propylsulfonic acid-functionalized nanocomposites based on natural rubber and hexagonal mesoporous silica (NRHMS-SO3H) with different acidities were prepared via an in situ sol-gel process using tetraethyl orthosilicate as the silica source, dodecylamine as the nonionic templating agent, and (3-mercaptopropyl)trimethoxysilane as the acid-functional group precursor. Compared with conventional propylsulfonic acid-functionalized hexagonal mesoporous silica (HMS-SO3H), NRHMS-SO3H provided higher hydrophobicity, while retaining mesoporosity and high surface area. The catalytic activity of synthesized solid acids was then evaluated via batch esterification of levulinic acid (LA) with alcohols (ethanol, n-propanol, and n-butanol) to produce alkyl levulinate esters. NRHMS-SO3H exhibited higher catalytic activity than HMS-SO3H and ultra-stable Y (HUSY) zeolite owing to the synergistic effect between the strongly acidic-functional group and surface hydrophobicity. The activation energy of the reaction over the NRHMS-SO3H surface was lower than that of HUSY and HMS-SO3H, suggesting that tuning the hydrophobicity and acidity on a nanocomposite surface is a compelling strategy for energy reduction to promote catalysis. Full article
(This article belongs to the Special Issue Silica-Based Molecular Sieves in Sustainable Chemistry)
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