摘要
采用分子前驱体煅烧法制备卤化氧铋富铋催化剂,制备过程中用光降解罗丹明B实验探索煅烧时间和温度对催化剂活性的影响,从而优选出催化剂最佳制备条件。制备的Bi24O31Cl10、Bi24O31Br10、Bi5O7I光催化剂用X射线衍射仪、环境扫描电子显微镜,紫外可见漫反射分光光度仪以及光电流响应光谱进行表征分析其晶体结构、形貌以及光学性能。通过紫外可见光降解油田含酚废水来评价催化剂的活性,经过5 h的光降解作用后,Bi5O7I催化剂催化降解苯酚和双酚A的降解率分别为82.1%和78.1%。此法为制备富铋卤化氧铋催化剂提供一种新方向。
Bismuth-rich bismuth catalyst,bismuth oxyhalide,was firstly prepared by molecular precursor calcining.Effects of calcination time and temperature on activity of the catalyst were investigated in photodegradation of rhodamine B to optimize catalyst preparation condition.Crystal phase,morphology and optical performance of photocatalyst Bi24O31Cl10,Bi24O31Br10 and Bi5O7I were characterized by X-ray diffraction,environmental scanning electron microscope,UV-vis diffuse reflectance spectroscopy(DRS)and photocurrent spectrum(PC).Degradation of phenol in oilfield wastewater was used to evaluate the photocatalytic activity under UV-visible irradiation.After 5 h of reaction,the degradation rates of phenol and bisphenol A were 82.1%and 78.1%respectively over Bi5O7I catalyst.This paper provides a new method for preparing bismuth-rich bismuth halogenated bismuth catalyst.
作者
张旭
杨萍
刘卫华
Zhang Xu;Yang Ping;Liu Weihua(School of Petroleum Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Sichuan Province Academy of Industrial Environmental Monitoring,Chengdu 610045,Sichuan,China)
出处
《工业催化》
CAS
2020年第11期62-67,共6页
Industrial Catalysis
基金
国家自然科学基金(51702270)
厦门大学开放基金(201601)
中国石油创新基金(2018D-5007-0604)。
关键词
催化剂工程
分子前驱
煅烧
富铋卤化氧铋
光降解
油田废水
catalyst engineering
molecular precursor
calcination
bismuth-rich bismuth halide
light degradation
oilfield wastewater
