NDLI: Photocatalytic Chemoselective Aerobic Oxidation of Thiols to Disulfides Catalyzed by Combustion Synthesized Bismuth Tungstate Nanoparticles in Aqueous Media

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Photocatalytic Chemoselective Aerobic Oxidation of Thiols to Disulfides Catalyzed by Combustion Synthesized Bismuth Tungstate Nanoparticles in Aqueous Media

Content Provider	Springer Nature Link
Author	Bhoi, Yagna Prakash Rout, Durga Prasad Mishra, B. G.
Copyright Year	2015
Abstract	Bismuth tungstate (Bi$_{2}$WO$_{6}$) nanoparticles were synthesized by solution combustion synthesis method using different N-containing organic compounds as fuels (urea, glycine, hexamethylenetetramine (HMTA), malonic acid dihydrazide (MDH)). The Bi$_{2}$WO$_{6}$ nanoparticles have been characterized using XRD, UV–Vis–DRS, photoluminescence, FESEM, HRTEM and sorptometric techniques. Glycine as fuel was effective for synthesis of phase pure Bi$_{2}$WO$_{6}$ nanoparticles. Employing HMTA and MDH as fuel lead to mixed phase complex oxide system with Bi$_{14}$W$_{2}$O$_{27}$ as minor (impurity) phase. The nature of the fuel significantly influences the particle size and morphology. Formation of spherical, flake like and elongated polyhedral particles were observed in FESEM study depending upon the nature of the fuel. TEM study of Bi$_{2}$WO$_{6}$ prepared using glycine fuel depicted the presence of spherical particles with size in the range of 5–8 nm. The Bi$_{2}$WO$_{6}$ nanoparticles were used as an efficient photocatalyst for the visible light driven chemoselective oxidation of substituted thiophenols to disulfide using air as oxidant. The effect of various reaction parameters such as catalyst amount, reaction media, time, along with catalyst recyclability were studied in detail. Structurally diverse diphenyl disulfide moieties were obtained in high yield and excellent selectivity within a time span of 6 h of visible light irradiation.
Starting Page	267
Ending Page	284
Page Count	18
File Format	PDF
ISSN	10407278
Journal	Journal of Cluster Science
Volume Number	27
Issue Number	1
e-ISSN	15728862
Language	English
Publisher	Springer US
Publisher Date	2015-10-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bismuth tungstate Chemoselective oxidation Thiols Visible light catalysis Catalysis Inorganic Chemistry Physical Chemistry Nanochemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Biochemistry Condensed Matter Physics Materials Science

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