Recent developments in metal-doped SBA-15 catalysts for heterogeneous catalysis and sustainable chemistry

Abstract

For the invention of new advanced sustainable materials for heterogeneous catalysis require control of structural parameter of active sites. Mesoporous silica, especially SBA-15 has some unique and important features such as highly ordered mesopore, greater hydrothermal stability, greater wall thickness, large surface area, and adjustable pore volume. All these properties render it a promising material for catalysis, adsorption, supporting material, biomedical application, and environmental remediation. However, purely SBA-15 lacks acidic characters, which hinder its catalysis capabilities. Therefore, functionalized SBA-15 improves the catalytic activities for versatile applications. Thus, in this paper, we attempted to summarize the synthesis procedures, various functionalization processes, and application of metal modified SBA-15 in organic synthesis, fine chemical synthesis, photocatalysis, and decontamination of water. Furthermore, physicochemical properties, sustainability, and efficacies are discussed in detail for future reference and scope of studies.

Facile synthesis of pyrazolopyridine pharmaceuticals under mild conditions using an algin-functionalized silica-based magnetic nanocatalyst (Alg@SBA-15/Fe3O4)

“…13,[15][16][17] Well-dened pore size between 4 to 30 nm, thick pore walls, pore architecture, 11,18 wide surface area (up to 1000 m 2 g −1 ), high thermal and hydrothermal stability, and excellent capability to be modied/functionalized are among the features that make materials based on SBA-15 have different applications, including adsorption, drug delivery, imaging, sensor, and catalysis. 13,[19][20][21][22] One-pot synthesis or co-condensation, and graing technique or post-synthesis are the two main methods used to modify/functionalize silica mesoporous materials. 13 Incorporation of Fe 3 O 4 magnetic nanoparticles as a superparamagnetic substance into silica-based mesoporous supports is a very practical step towards green chemistry, as it can lead to the easy separation of these materials from the reaction medium.…”

Synthesis, thermal evolution and magnetic investigations of SBA-15 silica functionalized with anchored iron phosphonate molecules

“…Therefore, one of the other ideas for engineering a new class of remediation-important materials turned out to be immobilized ions in slurry reactors, such as organic: polymers, or inorganic: silica, metal oxides, activated carbon, or zeolite [13,18]. From this viewpoint, the most promising is SBA-15 (Santa Barbara Amorphous), containing micro-and meso-porous and hexagonally arranged cylindrical pores with a diameter of about 5 nm and a surface area of around 800 m 2 g −1 [19][20][21]. Structurally, SBA-15 seems to be an excellent basis for the ultrahigh separation of active sites with great potential for pore wall functionalization through variable numbers and functional units.…”