光降解
光催化
罗丹明B
光化学
降级(电信)
材料科学
可见光谱
水溶液
化学工程
量子点
催化作用
化学
纳米技术
有机化学
光电子学
电信
计算机科学
工程类
作者
Xinping Guan,Shuang Ma,Jia-bao Yu,Yifei Ma,Hui Yu,Ming Yang,Xiangting Dong,Ying Yang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2024-04-12
标识
DOI:10.1021/acsanm.4c00116
摘要
Synergetic photocatalytic H2 production by organic dye photodegradation is always a goal. However, the related research has been hindered due to the uncontrollability of this process. This study prepares the ZnO/Bi-QDs/BiOBr photocatalyst, and the hole (h+) aggregation phase (ZnO) is constructed into a lamellar porous structure to improve its adsorption capacity for dyes based on the energy level structure of the composite. By this method, the reactive groups used for photodegradation of dyes are controlled to h+ and •OH, e– is used for photocatalytic H2 production, and the synergistic effect of dye photodegradation and photocatalytic H2 production is realized. Under the action of this photocatalyst and visible light, rhodamine B (RhB) is completely degraded in 8 min, the time can be reduced to 2 min when pH is 5, and it can realize the complete degradation of RhB in 120 min under natural sunlight. The H2 production rate reaches 1678 μmol·g–1·h–1 in RhB (h+ scavenger) aqueous solution under visible light. This study provides an effective method and design idea for the design of photocatalysts with photocatalytic H2 production during the photodegradation of organic dyes.
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