Ni离子掺杂改性MoS_(2)及其光催化降解四环素的性能研究

Modification of MoS_(2)by Ni ion doping and study on its photocatalytic degradation activity of tetracycline

采用水热法制备MoS_(2)及Ni-MoS_(2)光催化材料。利用XRD、SEM、UV-Vis、XPS等进行形貌、晶型结构、组成及性质等表征。用300 W的氙灯作为光源,模拟太阳光照射样品,测试Ni-MoS_(2)降解四环素的光催化性能。结果表明,3%Ni-MoS_(2)的光催化性能最佳,反应90 min,对四环素的降解率为67.1%,光催化活性提高是由于镍过渡金属离子的掺杂使得MoS_(2)的禁带宽度减小,提高对可见光的利用率及有效的抑制了光生载流子的复合。

MoS_(2)and Ni-MoS_(2)photocatalytic materials were prepared by hydrothermal method.Using XRD,SEM,UV-Vis,XPS etc.to characterize the morphology,crystal structure,composition and properties of the prepared photocatalytic materials were studied.A 300 W xenon lamp was used as a light source to simulate sunlight irradiating the sample,and the photocatalytic performance of the prepared material to degrade tetracycline was tested.The results showed that the photocatalytic performance of 3%Ni-MoS_(2)was the best,and the degradation rate of tetracycline after 90 min of reaction was 67.1%.The increase in photocatalytic activity is due to the decrease of the band gap of MoS_(2)due to the doping of nickel transition metal ions,thereby increasing the utilization rate of visible light and effectively inhibits the recombination of photogenerated carriers.