AgInxGa1−xS2 solid solution nanocrystals: synthesis, band gap tuning and photocatalytic activity

Na Liang; Qingquan He; Shoushuang Huang; Min Wang; Wenlong Chen; Miao Xu; Yanping Yuan; Jiantao Zai; Nenghu Fang; Xuefeng Qian

doi:10.1039/C4CE01239A

AgIn_xGa_1−xS₂ solid solution nanocrystals: synthesis, band gap tuning and photocatalytic activity†

Na Liang,^a Qingquan He,^a Shoushuang Huang,^a Min Wang,^a Wenlong Chen,^a Miao Xu,^a Yanping Yuan,^a Jiantao Zai,

*^a Nenghu Fang^a and Xuefeng Qian*^a

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* Corresponding authors

^a School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, PR China
E-mail: xfqian@sjtu.edu.cn, zaijiantao@sjtu.edu.cn
Fax: +86 21 54741297
Tel: +86 21 54743262

Abstract

AgIn_xGa_1−xS₂ (x = 0, 0.3, 0.5, 0.7 and 1) solid solutions with a size of 25–100 nm have been synthesized in a mixed solvent system via a solvothermal process. The crystal structure of the solid solutions gradually transforms from tetragonal to orthorhombic, along with the chemical composition (x value changes from 0 to 1), and the band gap of the solid solutions can be tuned from 2.37 eV to 1.62 eV. Further studies revealed that the obtained AgIn_xGa_1−xS₂ solid solutions show improved photocatalytic activities under visible light irradiation compared with AgGaS₂ and AgInS₂, and the AgIn_0.3Ga_0.7S₂ solid solution exhibits the best photocatalytic performance for its optimized band gap and energy structure.

CrystEngComm

AgIn_xGa_1−xS₂ solid solution nanocrystals: synthesis, band gap tuning and photocatalytic activity†

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AgIn_xGa_1−xS₂ solid solution nanocrystals: synthesis, band gap tuning and photocatalytic activity

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