Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 20, Issue 10, Pages 1944-1949Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(09)60399-X
Keywords
copper oxide (CuO); hydrogen evolution reaction (HER); photocatalytic activity; oxalic acid; simulated sunlight
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Funding
- National Natural Science Foundation of China [20876039]
- Natural Science Foundation of Hunan Province, China [09JJ3023]
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CuO was synthesized by thermal decomposition of Cu(NO3)(2) center dot 3H(2)O at various temperatures and characterized by powder X-ray diffractometry (XRD) as well as scanning electron microscopy (SEM). The effects of calcination temperature, category of sacrificial reagent, initial sacrificial reagent concentration, and Ag loading content on the photocatalytic activity of the as-obtained CuO sample were investigated. The results show that the as-obtained CuO exhibits high activity for photocatalysis of H-2 evolution reaction (HER) in oxalic acid solution under simulated sunlight irradiation. The highest photocatalytic activity of the as-obtained CuO was achieved at the calcination temperature of 1 000 degrees C, and oxalic acid was used as the sacrificial reagent with the concentration 0.05 mol/L. H-2 evolution rate is as high as 2.98 mmol/(h center dot g) with 2% (mass fraction) loaded Ag. The possible photocatalytic reaction mechanism on the CuO photocatalyst for HER in oxalic acid solution was also discussed.
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