BiOBr/硅藻土光催化降解四环素的研究

本文以Bi(NO3)3.5H2O、KBr和硅藻土为原料，采用直接水解法制备了BiOBr/硅藻土复合光催化剂。以四环素为目标降解污染物, 探讨了制备得到的催化剂用量，pH值和光源种类对四环素光催化去除效率的影响，同时结合反应动力学对四环素光催化降解过程进行了深入探讨。结果表明：在四环素初始浓度为30mg/L,催化剂投加量为0.10g，pH值为6和50W LED紫光灯照射的最优条件下，反应50min后四环素降解率达到91.3%，光催化反应过程更符合二级反应动力学规律。

Study on the photocatalytic degradation of tetracycline by BiOBr/diatomite#br#

In this paper, BiOBr/diatomite composite photocatalyst was prepared by the method of hydrolysis-deposition using Bi(NO3)3.5H2O, KBr, and diatomite as raw materials. The photocatalytic property of the composites was investigated with tetracycline as a target pollutant under 50W LED light irradiation. The effects of catalyst dosage, pH value, and light sources on tetracycline removal in suspension photocatalytic system were investigated. The results indicated that the hierarchical BiOX was loaded on the surface of diatomite in schistose. The photocatalytic degradation rate of tetracycline was up to 91.3% under the optimal reaction conditions as follows: 30mg/L initial dye concentration, 0.10g catalyst dosage, 50W UV LED light irradiation, and 50min. The photocatalytic reaction process was more in line with the second-order reaction kinetics.