光催化
光降解
异质结
罗丹明B
材料科学
可见光谱
纳米颗粒
等离子体子
X射线光电子能谱
表面等离子共振
光化学
吸收(声学)
载流子
纳米技术
化学工程
光电子学
化学
催化作用
复合材料
工程类
生物化学
作者
Mei Liu,Lingcheng Zheng,Jiale Deng,Juan Gao,Kangrui Su,Xile Sheng,Jie He,Deqiang Feng,Lei Guo,Changzhao Chen,Yan Li
标识
DOI:10.1016/j.jallcom.2022.167584
摘要
Constructing highly efficient, stable and wide applicable photocatalysts with simple and controllable components to confront the environmental issue need sustained efforts. In this work, Ag nanoparticles decorated AgBr/BiVO 4 shell/core heterojunction (Ag@AgBr/BiVO 4 ) was synthesized, which showed high photocatalytic activity in removing rhodamine B (RhB, 99.1% in 20 min) and tetracycline (TC, 94.1% in 20 min) under visible-light irradiation. The band structure was determined based on the light absorption spectra and Mott-Schottky test. The free radical scavenger test showed the production of ·OH and ·O 2 − radicals which accelerated the photodegradation. Basing on these results, the enhanced photocatalytic performance can be attributed to AgBr/BiVO 4 shell/core heterojunction that spatially separates the photogenerated carriers and inhibits bulk recombination. The localized surface plasmon resonance (LSPR) effect of Ag particles also improved the light absorption ability of the photocatalyst and effectively produce excess active species to accelerate the photodegradation of contaminants. The results show a coordinated regulation of Ag nanoparticles and AgBr/BiVO 4 shell/core heterojunction to achieve high photocatalytic properties, the strategy of rational designing structure and energy band alignment may also offer a new insight for the applications in solar energy conversion field. • Metal@shell/core structure Ag@AgBr/BiVO 4 photocatalyst was prepared for pollutants elimination. • Evident electron transfer between AgBr and BiVO 4 was convinced by XPS analysis. • Metal@shell and shell/core interfacial electric field will assist charge transfer. • Plasmonic heterojunction photocatalytic mechanism was proposed.
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