H2O2-assisted preparation of microspherical C60–TiO2 photocatalyst and its hydrogen evolution mechanism |
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Affiliation: | 1. School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China;2. School of Materials and Energy, Southwest University, Chongqing, 400715, China |
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Abstract: | Photocatalytic water splitting to produce hydrogen is one of the promising methods to deal with energy shortage and environmental crisis. In this paper, n-type H2O2/C60–TiO2 photo-catalysts with excellent hydrogen production performance were prepared by simple hydrothermal method. The prepared catalysts were characterized by polycrystalline XRD, TEM, UV–Vis–NIR spectroscopy, X-ray photoelectron spectroscopy, FTIR spectroscopy, Raman spectroscopy, etc. The results showed that H2O2 can promote the formation of microspherical catalyst; meanwhile, fullerene can broaden the light response range, increase the separation ability of photogenerated carriers and catalyze the formation of molecular H2 due to the formed superoxide radical. The water splitting experiments showed that the hydrogen evolution rate of H2O2/C60–TiO2 is up to 41.6 mmol?g?1h?1, 9.7 times of pure TiO2. These results have important reference significance for the development of new photocatalysts for water splitting to produce hydrogen. |
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Keywords: | Fullerene Photocatalytic water splitting Hydrogen evolution |
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