ZnO-TiO2复合光催化剂降解坝上地区污水中有机化合物性能的研究
Study on Degradation Activity of Organic Compound in Bashang Area Sewage Over ZnO-TiO2 Composite Photocatalyst
马志强 1陈纪文2
作者信息
- 1. 张北县水务局,河北 张家口 075000
- 2. 银川能源学院,宁夏 银川 750001
- 折叠
摘要
以硝酸锌和钛酸四丁酯为主要原料,采用溶胶-凝胶法制备了 ZnO-TiO2 复合光催化剂,用于降解张北坝上地区污水中的有机物,并对其性能进行研究.用XRD、UV-Vis对催化剂的晶体结构和催化剂光吸收的性能进行表征.结果表明:ZnO-TiO2 复合光催化剂主要以锐钛矿相TiO2 和立方Zn2TiO4晶相存在,较纳米TiO2 紫外线吸收能力强,且吸收带宽化并发生红移.在 5%的n(Zn)∶n(Ti)=3∶15 复合光催化剂,经避光吸附30 min后,20 W紫外灯照射5 h,污水中有机物的降解率为89.2%.
Abstract
ZnO-TiO2 composite photocatalyst was prepared by sol-gel method with the reagent of Zn(NO3)2 and C16H36O4Ti,and it was used to degrade organic matters in wastewater from Bashang area of Zhangbei,and its performance was investigated.XRD and UV-Vis were used to characterize the crystal structure and photo absorption of the catalysis.The results showed that ZnO-TiO2 composite photocatalyst mainly existed anatase phase TiO2 and cubic Zn2TiO4 crystalline phase,which strengthened the ultraviolet absorption ability than nano-TiO2,and with a bandwidth-absorption and red-shift.At the dosage of 5%,when the compound photocatalyst with n(Zn)∶n(Ti)ratio of 3∶15 was absorbed in dark for 30 min and irradiated by 20 W ultraviolet lamp for 5 h,the degradation rate of organic matters in sewage was 89.2%.
关键词
ZnO-TiO2/光催化剂/降解/污水Key words
ZnO-TiO2/Photocatalys/Degradation/Sewage引用本文复制引用
出版年
2024
NETL
NSTL
万方数据