磁性CuO非均相光催化H_(2)O_(2)去除水中SMX的机理研究

Study on the Mechanism of Heterogeneous Photocatalytic Degradation of Sulfamethoxazole in Water by H_(2)O_(2) With Magnetic CuO Nanoparticles

磺胺类抗生素是一种新污染物,水环境中的残留可能会对人体造成负面影响,因此研发磺胺类抗生素的深度处理技术是确保水质安全的重要途径。采用水热法合成一种磁性CuO光催化复合材料,用于在模拟太阳光照射的条件下,非均相催化H_(2)O_(2)去除水中磺胺甲噁唑。结果表明:CuO-Fe_(3)O_(4)复合材料具有良好的光催化活性和活化H_(2)O_(2)的能力,CuO和Fe_(3)O_(4)之间存在良好的协同作用,提高了SMX的降解率。自由基淬灭和ESR实验结果表明,反应中的活性基团为e^(-)、h^(+)、·O_(2)%(-)、·OH和^(1)O_(2)。

Sulfa antibiotics are a new pollutant,and their residues in the water environment may have a negative impact on the human body.Therefore,the development of advanced treatment technology of sulfa antibiotics is an important way to ensure the safety of water quality.A magnetic CuO photocatalytic composite was synthesized by hydrothermal method,which was used for heterogeneous catalytic H_(2)O_(2) removal of sulfamethoxazole from water under simulated sunlight irradiation.The results showed that CuO-Fe_(3)O_(4) composite had good photocatalytic activity and the ability to activate H_(2)O_(2).There was a good synergy between CuO and Fe_(3)O_(4),which improved the degradation rate of SMX.The results of radical quenching and ESR showed that the active groups in the reaction were e^(-),H^(+),·O_(2)^(-),·OH and ^(1)O_(2).