Study on Preparation and Visible Light Photocatalytic Activity of Fe3+ Doped AgInS2

Abstract

Abstract: Objective: To study the effects of Fe3+ doping on the structure, morphology and visible light photocatalytic activity of AgInS2. Methods: AgInS2 doped with different amount of Fe3+（denoted as Fe-AgInS2）were prepared by in-situ liquid phase method. Rhodamine B（RhB）and p-nitrophenol（PNP）were used as the degradation substrates for studying the visible light photocatalytic activity of Fe-AgInS2. Results: When Fe3+ : In3+ = 2.8 : 14.2, Fe-AgInS2 has the highest visible light catalytic activity for the degradation of RhB; among the four samples, Fe-AgInS2 with Fe3+ : In3+=12 : 5 has the highest visible light catalytic activity for the degradation of PNP. Conclusion: The doping of Fe3+ into AgInS2 did not change the structure and morphology of AgInS2, but it could adjust the particle size and crystallinity, enhance the absorption of AgInS2 in the range of 450-600 nm, and inhibit the recombination of photogenerated electrons（e-）and photogenerated holes（h+）, thus improving the visible light photocatalytic activity of AgInS2.

Key words: AgInS2, Fe-AgInS2, Rhodamine B, p-nitrophenol, visible light photocatalysis

Ba Deyan, Yang Ni, Yan Ya. Study on Preparation and Visible Light Photocatalytic Activity of Fe3+ Doped AgInS2[J]. Journal of Dali University, 2021, 6(6): 34-39.

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