多孔碳BVO/Zn@ZPC的制备及其光降解性能  

Preparation and Photodegradation Performances of Porous Carbon BVO/Zn@ZPC

作　　者：宁尧 刘满 刘素燕 NING Yao;LIU Man;LIU Suyan(School of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao Hebei 066000,China;College of New Energy and Materials,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066000 [2]中国石油大学(北京)新能源与材料学院,北京102249

出　　处：《石油化工高等学校学报》2023年第6期36-47,I0001,共13页Journal of Petrochemical Universities

基　　金：河北省自然科学基金项目(B2019203384、B2020203025)。

摘　　要：降解四环素(TC)是防治水污染的难点。以ZIF‐8为前驱体,采用直接焙烧法制备了多孔碳材料Zn@ZPC;采用水热法制备了BiVO_(4)(BVO),然后以Zn@ZPC和BVO为原料经原位热处理方法制备了BVO/Zn@ZPC复合材料;讨论了合成过程中BVO添加量(质量)和焙烧温度对催化剂物性及光催化性能的影响;分别采用XRD、SEM、TEM、N_(2)吸附‐脱附、XPS、UV‐vis DSR和ESR等技术,对光催化剂的形貌结构、金属物种的状态、孔结构等进行了分析。结果表明,在ZnO和BVO间形成了Z型异质结;在焙烧温度为600℃、BVO添加量为40 mg的条件下制得的BVO‐40/Zn@ZPC‐600复合材料具有最佳的光催化降解TC的性能;在可见光照射下,5 mg催化剂在60 min内可将100 mL的TC(50 mg/L)完全降解。Degradation of tetracycline(TC)is a challenge in the process of water pollution.A porous carbon material Zn@ZPC was obtained via direct roasting of ZIF-8 precursor and BiVO_(4)(BVO)was prepared by a hydrothermal method.Subsequently,a hybrid BVO/Zn@ZPCcomposites were prepared by in-situ heat treatment of Zn@ZPC and BVO.Meanwhile,the effects of the addition amount of BVO and roasting temperature on catalyst properties and photocatalytic performance were discussed in the process.The morphology and structure of the photocatalysts,the state of the metal species,and the pore structure were analysed by XRD,SEM,TEM,XPS,N_(2) adsorption-desorption,UV-vis DSR,and ESR techniques,respectively.The results showed that a Z-type heterojunction was formed between ZnO and BVO.In the experiments of photodegradation of tetracycline,BVO-40/Zn@ZPC-600 with a roasting temperature of 600℃and a BVO additive amount of 40 mg had the best photocatalytic degradation performance:under the irradiation of visible light,5 mg of the catalyst was able to completely degrade 100 mL TC(50 mg/L)within 60 min.

关 键 词：ZIF‐8 多孔碳 BiVO_(4) 光催化 四环素 

分 类 号：TQ032.41[化学工程] O643.3[理学—物理化学]