期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 180, 期 -, 页码 263-270出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2015.06.019
关键词
Carbon dioxide; Photocatalysis; Copper-doped TiO2; Sulfide; Wastewater
资金
- Spanish Ministry of Economy and Competitiveness (Severo Ochoa)
- Spanish Government [AP2010-2748, MAT2011-27008]
- Jaume I University [P1 1B2014-21]
- Consejo Superior de Investigaciones Cientifficas (CSIC)
- European Social Fund (ESF)
- Spanish Ministry of Economy and Competitiveness [CTQ2012-32315]
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 hydrolysiscondensation 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 H-2 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. 2015 Elsevier B.V. All rights reserved.
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