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Influence of activated carbon in TiO2 and ZnO mediated photo-assisted degradation of 2-propanol in gas–solid regime

Paper ID Volume ID Publish Year Pages File Format Full-Text
47224 46464 2010 11 PDF Available
Title
Influence of activated carbon in TiO2 and ZnO mediated photo-assisted degradation of 2-propanol in gas–solid regime
Abstract

2-Propanol was photocatalytically oxidized in the presence of binary materials composed by mixtures of home-prepared active carbon and commercial TiO2 or ZnO. Remarkable beneficial improvements of the photocatalytic activity were observed in the presence of activated carbon (AC). In particular the presence of AC along with TiO2 in the binary materials enormously increased the photocatalytic ability of the bare semiconductor to completely oxidize the substrate, indicating a synergy between the semiconductor and AC. Probably, when AC was present in the binary materials, the majority of the substrate and of the intermediates were reversibly adsorbed onto the AC surface. Due to the presence of a contact interface between TiO2 and AC, a continuous transfer of the species from the AC to the TiO2 surface was possible. On the other hand, the presence of AC avoided the deactivation of TiO2 that occurred instead for the bare semiconductor. The reaction rate in the presence of ZnO based materials was always lower with respect to that observed for the corresponding TiO2 ones, although the presence of AC improved the photoactivity of bare semiconductor in this case also.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Active carbon (AC) and TiO2 or ZnO binary materials were prepared and characterized. ▶ The binary materials increased the photocatalytic ability of the bare semiconductor to completely oxidize 2-propanol in gas-solid regime. ▶ AC avoided the TiO2 deactivation.

Keywords
Activated carbon; Titanium dioxide; Photocatalysis; 2-Propanol
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Influence of activated carbon in TiO2 and ZnO mediated photo-assisted degradation of 2-propanol in gas–solid regime
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 99, Issues 1–2, 31 August 2010, Pages 170–180
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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