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Visible Light Induced Photodegradation of Capsicum Red Pigment by Tm/TiO2-Loaded Cotton
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Chaoxia Wang
,
Kairui Zhang
Published/Copyright:
November 30, 2016
Abstract
Cotton fabric loaded by Tm/TiO2 sol shows high photoactivity against capsicum oil under visible light. The Xray diffraction spectra indicate that both anatase and rutile crystal sizes of Tm/TiO2 decrease with increase in Tm molar ratio (0-3%). The Tm/TiO2 optical absorption extends towards the visible spectrum and a red-shift of the maximum absorption edge (0.13eV) exists. Tm/TiO2 -loaded cotton fabric exhibits higher photocatalytic activities than that loaded by pure TiO2 on the degradation of capsicum oil. The increase in photoactivity is probably due to the band-gap narrowing, interfacial charge transfer and the elimination of eletron-hole recombination. Fourier transform infrared (FT-IR) analysis demonstrates that the carbochain and carboxide carbonyls bonds in the capsanthin chain are broken and mineralized into CO2 and H2O by oxidation process. The whole process shows promise for the total removal of capsicum oil on the cotton fabric.
Received: 2011-1-18
Revised: 2011-3-25
Accepted: 2011-4-3
Published Online: 2016-11-30
Published in Print: 2011-7-1
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Natural Zeolite Reactivity Towards Ozone: The Role of Acid Surface Sites
- The Effect of Operational Parameters on the Photocatalytic Degradation of C.I. Reactive Yellow 86 Textile Dye Using Manganese Zinc Oxide Nanocomposite Thin Films
- Comparison of the Effectiveness of Chlorine, Ozone, and Photocatalytic Disinfection in Reducing the Risk of Antibiotic Resistance Pollution
- Kinetic Modeling of the Photocatalytic Oxidation of Sodium Dodecylbenzenesulphonate
- Distillery Wastewater Treated by Electrochemical Oxidation with Boron-Doped Diamond Electrodes
- Visible Light Induced Photodegradation of Capsicum Red Pigment by Tm/TiO2-Loaded Cotton
- Treatment of Pharmaceutical-manufacturing Wastewaters by UV Irradiation/Hydrogen Peroxide Process
- Maleic Acid Oxidation Using A Heterogeneous Modified Polyacrylonitrile (PAN) Fibrous Catalyst
- Simulation of NOx Removal in NO/N2 Pulse Discharge System
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