Widely used in hospital and animal farming, the large amounts of norfloxacin (NORF) were discharged into the water environment which caused severe pollution problems. Photocatalysis technology can decompose, mineralize most organic compounds, including NORF. In this paper, Ni0.5Cd0.5S(NCS), g-C3N4(CN) and their composites were prepared as photocatalysts. The composites were characterized by SEM, energy-disperse X-ray spectroscopy (EDS) and XRD. It was showed that NORF in water can be effectively removed by NCS/CN composites in visible light. The experimental results proved that the composites have better photocatalytic degradation performance than NCS or CN alone. The best photocatalysis reaction condition of pH was 7. There were different performances on the degradation of NORF when the interfere anions, NO3ˉ, Cˉ and HCO3ˉwere mixed in the reactive system. HCO3ˉand Clˉ were the inhibitory substances on the photocatalysis reaction, and NO3ˉ slightly prompted the reaction. In addition, the main active substances produced in the reaction were superoxide radicals (•O2ˉ) and holes (h+) which were confirmed by adding different free radical quenchants in NORF photodegradation reaction system.
Qinjun Chen, Guoqiang Lai, Zanen Wu, Xia Chen, Jinhui Zhang, Shibiao Wu
You can use below filter to find your desired issue