Catalytic and photocatalytic oxidation of diphenyl sulphide to diphenyl sulfoxide over titanium dioxide doped with vanadium, zinc, and tin

Abstract

Phase transitions of rutile and anatase were directed by V, Zn and Sn admixtures. Rutile containing catalysts were more active in Ph2S oxidation than pure anatase samples. Efficiency of Ph2S oxidation was significantly improved under UV radiation.

Selective and efficient catalytic and photocatalytic oxidation of diphenyl sulphide to sulfoxide and sulfone: the role of hydrogen peroxide and TiO2 polymorph

“…In this system, even when selectivity is high, the concentration of the nal product is rather low. However, we showed recently that hydrogen peroxide is a crucial oxidation agent in the photocatalytic oxidation of Ph 2 S. 26 No Ph 2 S conversion aer 3 hours of the reaction in both catalytic and photocatalytic tests conducted in the absence of H 2 O 2 over bare and doped TiO 2 materials (concentrations of Ph 2 S oxidation products below the detection limit) was observed. Nevertheless, in the presence of hydrogen peroxide, the reaction can occur at P25 (anatase and rutile mixture) both on the catalytic and photocatalytic way, with signicantly higher conversion of Ph 2 S under irradiation compared to the dark process.…”

“…Recently, we described that the addition of tert-butyl alcohol (hydroxyl radical scavenger) signicantly diminishes the Ph 2 S conversion. 26 Furthermore, isotopic oxygen (H 2 18 O) experiments, reported by Li et al revealed that the oxygen atoms of sulfoxide (obtained photocatalytically from phenyl sulphide in water containing mixture, in the absence of H 2 O 2 ) originated mainly from water. 51 We concluded that hydroxyl radicals play a signicant role in the rst step of diphenyl sulphide oxidation, yielding Ph 2 SO.…”

“…We suggested that the crystal phase composition has a higher influence on both catalytic and photocatalytic activity than the surface metal modifications. 26 The goal of this work is to understand the difference between anatase and rutile in catalytic and photocatalytic Ph 2 S oxidation, describe the role of particular reactive oxygen species in these reactions, and learn how to control the reaction selectivity to different products.…”

Oxo‐vanadium(IV) unsymmetrical Schiff base complex immobilized on γ‐Fe2O3 nanoparticles: A novel and magnetically recoverable nanocatalyst for selective oxidation of sulfides and oxidative coupling of thiols

“…[ 19 ] Moreover, the titanium dioxide doped with vanadium(V‐TiO 2 ) showed high activity in the photocatalytic oxidation of sulfide to sulfoxide under UV irradiation. [ 20 ]…”

Copper based on diaminonaphthalene-coated magnetic nanoparticles as robust catalysts for catalytic oxidation reactions and C–S cross-coupling reactions

“…Their importance is based on the application in pharmaceutical industries and preparing a scaffold for aryl suldes as intermediates in synthetic organic chemistry. 33,34 Although the sulde and disulde oxidation reactions have been studied extensively, [35][36][37][38][39][40][41][42][43][44] it is necessary to introduce procedures that are more simple, efficient and selective. Herein, a magnetically separable heterogeneous catalyst was fabricated by anchoring a Cu complex supported on functionalized CoFe 2 O 4 nanoparticles.…”