Construction of Ag-AgInS2/In2S3/TNR Nanoarray High-Performance Photocatalyst and its Degradation Performance of Tetracycline Hydrochloride

Abstract

In this work, Ag quantum dot-modified AgInS2/In2S3/TNR nanoarray photocatalysts were prepared by a secondary hydrothermal and wet chemical method. Compared with the unmodified TNR arrays, the modified Ag-AgInS2/In2S3/TNR samples showed a significant increase in light absorption and could utilize more solar energy. In addition, the Ag-AgInS2/In2S3/TNR samples can effectively promote the separation and transfer of electron-hole pairs to enhance the photoelectrochemical and photocatalytic performance of the composites, and the degradation rate of the optimal Ag-AgInS2/In2S3/TNR samples can reach 95.73% for TC-HCl, which is of great importance for environmental protection. The main reasons for the enhanced catalytic performance are: the presence of surface Ag quantum dots and AgInS2 sensitizers greatly increases the absorption of sunlight, allowing more energy to enter the catalytic system; the stepped energy level arrangement of AgInS2/In2S3/TNR nanoarrays can spatially separate electrons and holes, improving the separation efficiency and enhancing the overall performance of the material.