金氮掺杂TiO_(2)光电催化降解四环素

Photoelectrocatalytic degradation of tetracycline by gold and nitrogen doped TiO_(2)

采用等离子体法和光还原法制备金氮掺杂TiO_(2),并对其进行X射线光电子能谱分析(XPS)和交流阻抗(EIS)分析。以金氮掺杂TiO_(2)为工作电极,研究四环素光电催化降解。结果表明:氮以掺杂形式进入TiO_(2)晶格,金以单质形式分布在TiO_(2)纳米管表面;金氮掺杂TiO_(2)电极呈低阻抗特性,具有良好的光电催化性能。当外加偏压20 V、pH值11、四环素初始质量浓度40 mg/L时,四环素降解效果最好。活性物质捕获实验表明,在光电催化降解四环素过程中h^(+)和·O_(2)^(-)为主要的活性物质。

Gold-nitrogen-doped TiO_(2)was prepared by plasma and photoreduction methods,and X-ray photoelectron spectroscopy(XPS)and alternating current impedance(EIS)analyses were performed.The photocatalytic degradation of tetracycline was investigated by using gold-nitrogen-doped TiO_(2)as the working electrode.The results show that the nitrogen entered the TiO_(2)lattice in the form of doping and the gold is distributed on the surface of TiO_(2)nanotubes in the form of singlet;The gold-nitrogen-doped TiO_(2)electrode has low impedance characteristics and has good photocatalytic performance.The best degradation of tetracycline is achieved at an external bias of 20 V,pH 11 and an initial concentration of 40 mg/L of tetracycline.The active substance capture experiments show that h^(+) and·O_(2)^(-) are the main active substances in the photocatalytic degradation of tetracycline.