Preparation of Ag(Au)/Graphene-TiO2 Composite Photocatalysts and Their Catalytic Performance under Simulated Sunlight Irradiation

doi:10.3724/SP.J.1088.2012.20820

Abstract

Abstract: To improve the solar utilization efficiency of TiO₂, the graphene-TiO₂ and Ag(Au)/graphene-TiO₂ composite photocatalysts were prepared by solvothermal reduction and photoreduction deposition technique, respectively. The phase structure, morphology, porosity, optical absorption property as well as composition and structure of as-prepared materials were characterized. The results indicated that TiO₂ interacts with graphene via Ti–O–C covalent bonds and Ag or Au nano-particles evenly deposite on the graphene and TiO₂ surface. The photocatalytic activity and degradation kinetics of the as-prepared photocatalysts were studied by the degradation of aqueous rhodamine B and methyl orange under solar simulating Xe lamp irradiation. The results indicated that the composite photocatalysts exhibit higher photocatalytic activity compared with pure TiO₂ due to enhanced quantum efficiency, narrowed band gap, and perfect textural properties.

Key words: graphene, titania, silver, gold, solvothermal reduction, photoreduction, rhodamine B, methyl orange

JIANG Ling-Xiao, LI Ke-Xin, YAN Liu-Shui, DAI Yu-Hua, HUANG Zhi-Min. Preparation of Ag(Au)/Graphene-TiO₂ Composite Photocatalysts and Their Catalytic Performance under Simulated Sunlight Irradiation[J]. Chinese Journal of Catalysis, 2012, 33(12): 1974-1981.

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URL: https://www.cjcatal.com/EN/10.3724/SP.J.1088.2012.20820

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Preparation of Ag(Au)/Graphene-TiO₂ Composite Photocatalysts and Their Catalytic Performance under Simulated Sunlight Irradiation

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