Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu₃Se₂ Composite via a Phase Junction.
A novel Cu1.8Se/Cu₃Se₂ composite photocatalyst was prepared by the simple precipitation method. This composite possesses a wide photoabsorption until the range of near-infrared light, and exhibits significantly enhanced photocatalytic activity for methyl orange degradation under visible and near-infrared light irradiation compared with bare Cu1.8Se and Cu₃Se₂. The mechanism of this outstanding photocatalytic behavior can be explained by the calculated energy band positions. The efficient charge separation via a phase junction of Cu1.8Se/Cu₃Se₂ composite would make a great contribution to its much-enhanced photocatalytic efficiency.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. qln13@mails.tsinghua.edu.cn.
Li-Na
LN
Qiao
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. wanghc12@mails.tsinghua.edu.cn.
Huan-Chun
HC
Wang
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. shyang_mse@mail.tsinghua.edu.cn.
Yang
Y
Shen
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. linyh@mail.tsinghua.edu.cn.
Yuan-Hua
YH
Lin
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. cwnan@mail.tsinghua.edu.cn.
Ce-Wen
CW
Nan
Cu1.8Se/Cu3Se2 composite; near-infrared; phase junction; photocatalysis; visible