光催化
罗丹明B
异质结
材料科学
降级(电信)
化学工程
热液循环
纳米技术
光化学
光电子学
催化作用
化学
有机化学
计算机科学
工程类
电信
作者
Lei Li,Yan Du,Houxiang Sun,Huabing Zhang,Zicong Zhong
出处
期刊:Chemcatchem
[Wiley]
日期:2023-01-19
卷期号:15 (4)
被引量:4
标识
DOI:10.1002/cctc.202201436
摘要
Abstract The accumulation of organic dyes in water and their consequent detrimental effect to ecological environment have attracted worldwide extensive attention. It is urgent to develop rapid and efficient method to degrade organic dyes. In this paper, an efficient CdZnS/SnS 2 /SnO 2 heterojunction is successfully prepared by sequential template approach and hydrothermal method. Comparison with CdZnS and SnS 2 /SnO 2 , the heterogeneous structure of CdZnS/SnS 2 /SnO 2 greatly enhances the photocatalytic degradation ability of Rhodamine B (RhB). The apparent reaction rate of CdZnS/SnS 2 /SnO 2 heterostructure is around 12.71 and 16.69 times higher than those of SnS 2 /SnO 2 and CdZnS, respectively, reaching 0.0267 min −1 . After CdZnS/SnS 2 /SnO 2 photocatalysis of RhB solution, the BOD/COD ratio increases from 0.168 to 0.725, indicating that the biodegradability is greatly improved. It has been proved that ⋅OH, ⋅O 2− , h + and e − are the main active species involved in the degradation process. In addition, the CdZnS/SnS 2 /SnO 2 exhibits good stability and reusability, with little change in the photocatalytic activity after five cycles. Its superior removal activity is mainly due to the formation of heterojunction improved light harvesting and enhanced separation efficiency. This work provides a new insight for photocatalytic degradation of organic dye wastewater by solar light.
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