Ag_3PO_4/硅藻土可见光催化降解盐酸四环素性能研究

以硅藻土为载体,采用离子交换法制备了Ag_3PO_4/硅藻土复合光催化剂。采用UV-Vis-DRS和XRD对其进行表征,以盐酸四环素为目标降解物,考察了催化剂制备条件及反应条件对其光催化性能的影响。结果表明,Ag_3PO_4/硅藻土有良好的可见光响应性。Ag_3PO_4含量为20%的Ag_3PO_4/硅藻土对盐酸四环素表现出相对较优的催化活性。该催化剂在投加量为1 g/L,溶液p H值为7,可见光下反应120 min的反应条件下,对20 mg/L的盐酸四环素降解率达到86.4%。

Visible Light Photocatalytic Degradation of Tetracycline Hydrochloride by Ag3PO4/Diatomite

Ag3PO4/diatomite composite photocatalysts were prepared by ion exchange method with diatomite as the carrier. The structure of the samples was characterized by UV-Vis-DRS and XRD technique. Using the degradation of tetracycline hydrochloride as the probe reaction, the influence of the preparation condition and reaction condition were investigated on the visible light photocatalytic performance of the Ag3PO4/diatomite. The results show that the Ag3PO4/diatomite has a good visible light responsiveness. The photocatalyst with 20 % Ag3PO4 loading show optimum catalytic activity for the degradation of tetracycline hydrochloride. When the initial concentration of tetracycline hydrochloride is 20 mg/L, the catalyst dosage is 1 g/L, pH of the solution is 7, illumination lasted 120 min in visible ligh, the degradation rate of the antibiotics is 86.4%.