Multifunctional sandwich-like mesoporous silica–Fe₃O₄–graphene oxide nanocomposites for removal of methylene blue from water

Abstract

A novel sandwich-like mesoporous silica–Fe3O4–GO adsorbent was synthesized, which exhibited excellent adsorption properties and could be recycled by using an external magnetic field.

Grafting and stabilization of ordered mesoporous silica COK-12 with graphene oxide for enhanced removal of methylene blue

“…13,14 Although graed GO/OMS materials could be equally or more effective and cheap adsorbents, only few examples exist in literature dealing with graing of GO on OMS materials. [15][16][17][18] COK-12, an additional type of OMS material, exhibiting short plate-like particles, has been chosen for this work as it can be produced from the same nonionic triblock copolymer as SBA-15, at room temperature under quasi neutral pH using an inexpensive silica precursor, making the synthesis more environmentally friendly in comparison to other OMS materials. 19 Although COK-12 typically has a lower specic surface area than SBA-15, recent improvements to the specic surface area, pore size, and pore volume through controlling synthesis steps and parameters means that the properties of COK-12 are now competitive with those of SBA-15.…”

12-Molybdophosphoric acid anchored on aminopropylsilanized magnetic graphene oxide nanosheets (Fe3O4/GrOSi(CH2)3–NH2/H3PMo12O40): a novel magnetically recoverable solid catalyst for H2O2-mediated oxidation of benzylic alcohols under solvent-free conditions

“…[43][44][45] Hence, magnetic graphene-based composites with large specic surface area and magnetic separation have begun to be used in the eld of organic transformations. [46][47][48][49][50] On the basis of the above discussions, in this work, aminoorganosilane functionalized magnetic graphene oxide (Fe 3 O 4 / GrOSi(CH 2 ) 3 -NH 2 ) was synthesized by a facile method and used as a novel magnetic GrO-based support. Due to relatively high surface area and porosity, insolubility in water and easy magnetically separation, the Fe 3 O 4 /GrOSi(CH 2 ) 3 -NH 2 is an appropriate solid support to anchor Keggin-type PMo 12…”

Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization

“…Carbon-encapsulated Fe 3 O 4 nanoparticles can also be used as an anode material in lithium-ion battery [48,49]. Furthermore, mesoporous silicon-Fe 3 O 4 -graphene oxide nanocomposites have been reported to be a good material to remove dyes such as methylene blue from water [50].…”