Applied Chemical Engineering

Study on photocatalytic properties of Cu2O/TiO2 heterojunction composite films

Hailing Zhu

Shandong Key Laboratory, School of Physics and Opto-electronic Engineering, Weifang University

Yanyan Tang

Shandong Key Laboratory, School of Physics and Opto-electronic Engineering, Weifang University

DOI: https://doi.org/10.24294/ace.v4i2.1352

Keywords: Cu2O/TiO2, Composite Film, Heterojunction, Photocatalysis, Solar Energy

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Abstract

Cu₂O/TiO₂ semiconductor heterostructure photocatalytic composite thin films were prepared by the sol-gel method and magnetron sputtering technology. Uniform and transparent TiO₂ thin films were prepared by sol dipping and pulling with butyl titanate as the raw material. P-type Cu₂O thin films were reactive sputtered on the surface of TiO₂ thin films with metal Cu as target source. The catalysts were characterized by SEM, XRD and UV-Vis. The photocatalytic activity of heterojunction composite films under simulated sunlight was investigated by dye degradation experiments, and its mechanism is discussed. The results show that the heterojunction film formed by the composite of TiO₂ and Cu₂O has good photocatalytic activity under simulated sunlight. The heterojunction composite expands the light response range and light response intensity of the catalyst and improves the quantum efficiency. It is a kind of photocatalytic composite film that makes full use of solar energy.

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