摘要
当下疫情频发,医疗废物、医疗废水排放量激增,对生态环境和群众健康构成了极大威胁,如何高效处理医疗废水成为刻不容缓的问题。本文制备了一种高效的p-n异质结Bi_(2)S_(3)/TiO_(2)复合光催化剂,探究了全光下该复合材料对盐酸四环素(TC)的光催化降解效果,SEM、XRD、UV-vis DRS、EIS等表明TiO_(2)颗粒与花瓣状Bi_(2)S_(3)成功复合,引进Bi_(2)S_(3)后,TiO_(2)光响应范围从紫外光扩展至可见光,同时光生电子与空穴复合率降低,材料的光催化能力大大增强。当Bi_(2)S_(3)的质量分数为4%时,Bi_(2)S_(3)/TiO_(2)光催化活性最高,100 min全光照射下对盐酸四环素(TC)的降解率达到91.72%,一级动力学常数是纯TiO_(2)的4.40倍。
At present,frequent outbreak of epidemic brought about the soaring discharge of medical wastewater,which poses a great threat to the ecological environment and human health.How to effectively treat medical wastewater has become an urgent problem.In this paper,a highly efficient p-n heterojunction Bi_(2)S_(3)/TiO_(2)composite photocatalyst was prepared,and the photocatalytic degradation effect for tetracycline hydrochloride(TC)under white light was investigated.SEM,XRD,UV-vis DRS and EIS showed that TiO_(2)particles were successfully combined with petal-like Bi_(2)S_(3).The photocatalytic degradation results showed that the introduction of Bi_(2)S_(3)extended the light response range of TiO_(2)to visible light and reduced the recombination rate of photogenerated electrons and holes.Its light harvesting and photocatalytic activity are greatly enhanced.When the mass percentage of Bi_(2)S_(3)is 4%,the photocatalytic activity under white light is the highest.The total removal rate of tetracycline hydrochloride(TC)in 100 min is 91.72%,and the reaction rate constant is 4.40 times higher than that of pure TiO_(2).
作者
樊宇天
姚章奎
张佳顺
卢文航
杨圳伟
刘锐珍
李萍
Fan Yutian;Yao Zhangkui;Zhang Jiashun;Lu Wenhang;Yang Zhenwei;Liu Ruizhen;Li Ping(Key Laboratory for Green Chemical Engineering Process of Ministry of Education,Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province,Engineering Research Center of Phosphorus Resource Development and Utilization of Ministry of Education,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《山东化工》
CAS
2023年第9期235-238,241,共5页
Shandong Chemical Industry
基金
2021年湖北省级大学生创新创业训练计划项目(S202110490001)
2021年武汉工程大学第十六期大学生校长基金项目(XZJJ2021091)。
关键词
硫化铋
二氧化钛
光催化
盐酸四环素
bismuth sulfide
titania
photocatalysis
tetracycline hydrochloride
