Graphene-TiO2 Composite Photocatalyst with Enhanced Photocatalytic Performance

doi:10.1016/S1872-2067(11)60374-4

Abstract

Abstract: Here we used a hydrothermal process and calcination in the absence of O₂ to obtain a highly efficient chemically bonded graphene-TiO₂ nanocomposite photocatalyst utilizing graphene oxide and tetra-n-butyl titanate as precursors. The nanocomposite photocatalyst could inhibit the recombination of photo-generated electron-hole pairs of TiO₂ and then enhanced the photocatalytic efficiency. The results presented by transmission electron microscope, X-ray diffraction, Raman microscopy, and X-ray photoelectron spectroscopy showed that anatase TiO₂ particles attached on the surface of the film-shaped graphene. The photocatalytic capability of graphene-TiO₂ catalyst under UV light was evaluated and the results showed that graphene-TiO₂ had good stability and better photocatalytic ability than pure TiO₂ prepared by similar method. The holes governed the photocatalytic process and the photocatalytic performance of this photocatalyst was improved at high pH value.

Key words: graphene, titania, photocatalysis, UV light, stability, hole, pH value

ZHAO Hui-Min, SU Fang, FAN Xin-Fei, YU Hong-Tao, WU Dan, QUAN Xie. Graphene-TiO2 Composite Photocatalyst with Enhanced Photocatalytic Performance[J]. Chinese Journal of Catalysis, 2012, 33(5): 777-782.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(11)60374-4

https://www.cjcatal.com/EN/Y2012/V33/I5/777

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