In situ growth of Bi/Ag double quantum dots on hollow Bi2MoO6 microspheres: Enhancement of the surface plasmon resonance effect on PMS activation

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-06-24 DOI:10.1016/j.apcatb.2023.123041

Yao Deng , Juntao Wang , Jing Wang , Huidi Zhang , Hongbo Xiao , Cuihong Zhang , Wenlei Wang

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引用次数: 2

Abstract

In this work, the effect of Bi/Ag double quantum dots on plasmon resonance and PMS activation was investigated. Bi/Ag double quantum dots were generated in situ on hollow Bi₂MoO₆ microspheres by stepwise irradiation using a high-energy β electron beam. The formation of Bi/Ag DQDs greatly optimized the drawbacks of Bi₂MoO₆ in terms of light absorption. Synergistic introduction of DQDs greatly reduced the band gap from 2.72 eV to 2.12 eV. The Bi−Ag@Bi₂MoO₆ − 400/PMS system degraded ciprofloxacin with kinetic constants 10 and 12 times higher than those of the Bi@Bi₂MoO₆/PMS and Bi₂MoO₆/PMS systems. The formation of an electron transfer path from Ag QDs to Bi QDs enhanced the SPR effect of Bi QDs.·O₂⁻ and ¹O₂ played a major role in the CIP degradation process. This study will provide a new strategy for enhancing the Bi plasmon resonance effect and provide a technical method to the efficient degradation of antibiotics in water.

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在空心Bi2MoO6微球上原位生长Bi/Ag双量子点:表面等离子体共振效应对PMS激活的增强

本文研究了Bi/Ag双量子点对等离子激元共振和PMS激活的影响。利用高能β电子束逐步辐照，在空心Bi2MoO6微球上原位生成了Bi/Ag双量子点。Bi/Ag双量子点的形成极大地改善了Bi2MoO6在光吸收方面的缺点。DQDs的协同引入使带隙从2.72 eV大大减小到2.12 eV。Bi−Ag@Bi2MoO6−400/PMS体系降解环丙沙星的动力学常数比Bi@Bi2MoO6/PMS和Bi2MoO6/PMS体系分别高10倍和12倍。从Ag量子点到Bi量子点的电子转移路径的形成增强了Bi量子点的SPR效应。·O2−和1O2在CIP降解过程中起主要作用。本研究将为增强双等离子体共振效应提供新的策略，并为有效降解水中抗生素提供技术方法。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.