g-C_(3)N_(4)-MoS_(2)的制备及其对盐酸四环素的催化降解性能

Preparation of g-C_(3)N_(4)-MoS_(2) and its catalytic activity on degradation of tetracycline hydrochloride

以钼酸钠、硫脲和三聚氰胺为原料,采用水热合成法制备了g-C_(3)N_(4)-MoS_(2)异质结复合材料,研究了g-C_(3)N_(4)-MoS_(2)作为催化剂降解废水中盐酸四环素(TC)的性能,考察了m(C_(3)N_(4))∶m(MoS_(2))、TC模拟废水质量浓度及催化剂用量对降解TC的影响。实验结果表明,无需光照,g-C_(3)N_(4)-MoS_(2)作为催化剂对TC表现出良好的降解性能,黑暗条件下降解60 min,添加25 mg g-C_(3)N_(4)-MoS_(2)(m(C_(3)N_(4))∶m(MoS_(2))=1∶3)催化剂,对50 mL质量浓度为10 mg/L的模拟废水中TC的降解率达到65%。

g-C_(3)N_(4)-MoS_(2) heterojunction composite was prepared by hydrothermal synthesis method using sodium molybdate,thiourea and melamine as raw materials.The catalytic activity of g-C_(3)N_(4)-MoS_(2) on degradation of tetracycline hydrochloride(TC)in wastewater was studied.The effects of m(C_(3)N_(4))∶m(MoS_(2)),TC mass concentration of the simulated wastewater and the amount of catalyst on TC degradation were investigated.The experimental results show that g-C_(3)N_(4)-MoS_(2) as catalyst has a good degradation performance to TC,and when 50 mL simulated wastewater with 10 mg/L of TC mass concentration is degraded with 25 mg g-C_(3)N_(4)-MoS_(2)(m(C_(3)N_(4))∶m(MoS_(2))=1∶3)catalyst in dark condition for 60 min,the degradation rate of TC can reach 65%.