碳布支撑Sn^(2+)/Sn^(4+)共掺杂的ZnIn_(2)S_(4)柔性光催化剂用于高效降解盐酸四环素

Carbon cloth supported Sn^(2+)/Sn^(4+)co-doped ZnIn_(2)S_(4) flexible photocatalyst for the efficient degradation of tetracycline hydrochloride

本文采用一步溶剂热法制备了Sn^(2+)/Sn^(4+)共掺杂的ZnIn_(2)S_(4)/碳布柔性光催化剂(CC/ZIS-Sn),二维片状ZIS-Sn均匀地排列在碳布表面。通过降解盐酸四环素(TCH)溶液来评价所制备样品的光催化活性。结果表明,CC/ZIS-Sn_(0.09)复合光催化剂具有高效的光催化活性,40 min对TCH溶液(50 mL,20 mg/L)的降解率高达93.3%。适量的Sn掺杂和碳布协同作用能够调整电子结构,缩小光捕获带隙,增强ZIS光生载流子的分离和转移效率。自由基捕获实验证明空穴是光催化降解过程中的主要活性物质。此外,CC/ZIS-Sn光催化剂还具有良好的可回收性和稳定性,循环测试4次后,对TCH溶液的去除率仍达83.1%。

In this paper,Sn^(2+)/Sn^(4+)co-doped ZnIn_(2)S_(4)/carbon cloth(CC/ZIS-Sn)flexible photocatalyst was prepared by a one-step solvothermal method,two-dimensional Sheets of ZIS-Sn are uniformly arranged on the surface of the carbon cloth.The photocatalytic activity of the prepared samples was evaluated by degradation of tetracycline hydrochloride(TCH)solution,The experiment results show that CC/ZIS-Sn_(0.09)composite photocatalyst has high photocatalytic activity,The degradation rate of TCH solution(50 mL,20mg/L)was up to 93.3%for 40 min.The synergistic effect of proper Sn doping and carbon cloth can adjust the electronic structure,narrow the optical capture band gap,and enhance the separation and transfer efficiency of ZIS photogenerated carriers.Free radical capture experiments show that the holes are the main active substances in photocatalytic degradation process.In addition,CC/ZISSn photocatalyst also has good recyclability and stability,After four cycles of testing,the removal rate of TCH solution is still up to 83.1%.