CuO/Bi2MoO6复合材料在可见光下协同过一硫酸盐降解AO7
Efficient degradation of AO7 by CuO/Bi2MoO6 composites synergistically with peroxymonosulfate under visible light
蔡承润 1赵丹 1董延茂 2孙艺源 1毛宗卿1
作者信息
- 1. 苏州科技大学环境科学与工程学院,苏州,215009
- 2. 苏州科技大学化学生命与科学学院,苏州,215009
- 折叠
摘要
本文采用水热法和浸渍煅烧法成功合成CuO/Bi2MoO6异质结,并建立了 CuO/Bi2MoO6复合材料在可见光下活化过一硫酸盐降解AO7的协同催化体系.采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和紫外可见漫反射光谱(UV-vis)对复合材料的晶相结构、元素组成、形貌结构和吸收波长进行了表征,并探讨了在不同条件下的对AO7的去除性能.结果表明,CuO的引入增强了 Bi2MoO6的光催化性能,同时增强了对PMS的活化.当AO7的浓度为0.1 mmol·L-1,催化剂为0.25 g·L-1,PMS为1 mmol·L-1条件下,AO7的降解率可以在30 min内达到99％以上.提出了 AO7一种可能存在的降解机理,并通过自由基消除实验进行了验证.复合材料在5次降解循环后仍能保持活化性能,具有较高的稳定性.
Abstract
In this paper,CuO/Bi2MoO6 heterojunctions were successfully synthesized by hydrothermal method and impregnation calcination method,and a synergistic catalytic system of CuO/Bi2MoO6 composites activated by peroxymonosulfate to degrade AO7 under visible light was established.X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and ultraviolet-visible diffuse reflectance spectroscopy(UV-vis)were used to investigate the crystal phase structure,elemental composition,morphological structure and absorption of the composites The wavelengths were characterized and the removal performance of AO7 under different conditions was discussed.The results showed that the introduction of CuO enhanced the photocatalytic performance of Bi2MoO6 and enhanced the activation of PMS at the same time.When the concentration of AO7 is 0.1 mmol·L-1,the catalyst is 0.25 g·L-1,and the PMS is 1 mmol·L-1,the degradation rate of AO7 can reach more than 99％within 30 min.A possible degradation mechanism of AO7 was proposed and verified by free radical elimination experiments.The composites can still maintain the activation performance after 5 degradation cycles and have high stability.
关键词
钼酸铋/氧化铜/复合材料/光催化/过一硫酸盐Key words
bismuth molybdate/copper oxide/composite material/photocatalytic/peroxymonosulfate引用本文复制引用
基金项目
苏州区域水质提升与水生态安全保障技术及综合示范项目(2017ZX07205)
苏州市产业化前瞻项目(SYG201744)
出版年
2024
NETL
NSTL
万方数据