Acidic ionic liquids: an alternative to HF for {001} reactive facet controlled synthesis of anatase titania

Abstract

A HF free method for the controlled synthesis of nanosized TiO2 with a higher percentage of {001} reactive facets.

DES-mediated synthesis of ZnO nanostructures with exposed {0001} facets: photoluminescence and photocatalytic properties

“…Various photoactive nanostructures such as TiO 2 and ZnO synthesized in various ionic liquids with different morphologies and improved properties are well explored. [1][2][3][4][5] However, to overcome the toxicity of ionic liquids, deep eutectic solvents (DESs), the new generation of ILs, have been considered as more suitable alternatives to the conventional ILs. They have proved to be more advantageous over the latter due to their biodegradability, ease of preparation, low synthesis cost, nontoxicity and easily tailorable structures as per the requirement.…”

Tailoring the exposed facets of anatase titania and probing their correlation with photocatalytic activity – an experimental and statistical study

“…Therefore, facet tuning of titania synthesized using green solvents has become an emerging research area, although few studies have been carried out using ionic liquids and deep eutectic solvents (DESs) to synthesize these modified catalysts. 15–17…”

“…We previously reported the synthesis of {001}- and {111}-facet-dominated titania with an HF-free method using IL/DESs as structure-directing and capping agents. 15,17…”

“…Therefore, facet tuning of titania synthesized using green solvents has become an emerging research area, although few studies have been carried out using ionic liquids and deep eutectic solvents (DESs) to synthesize these modified catalysts. [15][16][17] DESs are the most widespread quasi-ionic liquid, and have been proven as satisfactory substitutes for organic solvents, which are widely used in the preparation of shape-controlled nanomaterials with the advantage of improved catalytic activity under milder conditions. [18][19][20] DES has been used to synthesize brookite-rutile heterophase junctions and to cover titania nanoparticles (NPs), and has also been proven as a sustainable media for titania synthesis.…”

“…We previously reported the synthesis of {001}-and {111}-facet-dominated titania with an HF-free method using IL/DESs as structure-directing and capping agents. 15,17 In this study, we examined the effects of different concentrations of precursor and DES and calcination temperature on the formation of exposed reactive facets of titania NPs. The photocatalytic efficiency was tested using methyl orange as a model compound.…”