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Photochemical synthesis of copper sulphide/titanium oxide photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
27533 44029 2011 8 PDF Available
Title
Photochemical synthesis of copper sulphide/titanium oxide photocatalyst
Abstract

Copper sulphide powder was obtained by the photochemical synthesis and thin films were developed by doctor blade deposition of CuxS and CuxS/TiO2 composites with photocatalytic properties. The photochemical process could be adjusted to prepare CuxS with different photocatalytic activities by changing the CuSO4:Na2S2O3 molar ratio while keeping other conditions unchanged (solutions pH, solutions volume, irradiation time and intensity). The powder and thin film properties were characterized in terms of: the Fourier transform infra-red (FTIR), the X-ray diffraction (XRD), UV–vis spectroscopy, atomic force microscopy (AFM).The photocatalytic process using CuxS and coupled CuxS/TiO2 thin film semiconductors in the dyes photodegradation (methyl orange and methylene blue) was investigated. The photocatalytic activity of CuxS/TiO2 nanocomposites depends on the CuxS:TiO2 ratio; the best results correspond to the CuxS/TiO2 (CuxS:TiO2 = 3:7) photocatalysts, with high efficiency (almost 99%) after 300 min for methyl orange, respectively after 180 min for methylene blue degradation, under UV irradiation, when H2O2 is added in photocatalytic process. The semiconductors association and the films homogeneity limit the electron–hole recombination, resulting in good efficiency in dyes photodegradation even under visible light irradiation.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Copper sulphide powder obtained by photochemical synthesis. ► A narrow-band gap hybrid photocatalysts (CuxS/TiO2) sensitive to the visible light. ► The CuxS/TiO2 hybrid photocatalysts activated with H2O2 exhibited a higher catalytic efficiency (99%) for dyes degradation comparing to the mono-component films.

Keywords
Photochemical synthesis; Copper sulphide; Titanium oxide; Photocatalysis; Methyl orange; Methylene blue
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issue 1, 10 June 2011, Pages 30–37
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us