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Copper-doped titania photocatalysts for simultaneous reduction of CO2 and production of H2 from aqueous sulfide

Paper ID Volume ID Publish Year Pages File Format Full-Text
45242 46407 2016 8 PDF Available
Title
Copper-doped titania photocatalysts for simultaneous reduction of CO2 and production of H2 from aqueous sulfide
Abstract

•Copper is incorporated as a dopant in the lattice of TiO2 by solvo-thermal methods.•Cu-TiO2 enables CO2 reduction and H2 production under irradiation.•Cu-doped photocatalysts are more active than Cu-impregnated counterparts.•Concomitant sulfide pollutant removal improves process efficiencies.

Copper-doped titanium dioxide materials with anatase phase (Cu-TiO2, atomic Cu contents ranging from 0 to 3% relative to the sum of Cu and Ti), and particle sizes of 12–15 nm, were synthesised by a solvo-thermal method using ethanol as the solvent and small amounts of water to promote the hydrolysis-condensation processes. Diffuse reflectance UV–vis spectroscopy show that the edges of absorption of the titania materials are somewhat shifted to higher wavelengths due to the presence of Cu. X-ray photoelectron spectroscopy (XPS) indicate that Cu(II) is predominant. Photocatalytic CO2 reduction experiments were performed in aqueous Cu-TiO2 suspensions under UV-rich light and in the presence of different solutes. Sulfide was found to promote the efficient production of H2 from water and formic acid from CO2. The effect of the Cu content on the photoactivity of Cu-TiO2 was also studied, showing that copper plays a role on the photocatalytic reduction of CO2.

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Keywords
Carbon dioxide; Photocatalysis; Copper-doped TiO2; Sulfide; Wastewater
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Copper-doped titania photocatalysts for simultaneous reduction of CO2 and production of H2 from aqueous sulfide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 263–270
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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