Localized surface plasmon resonance effect of bismuth nanoparticles in Bi/TiO2 catalysts for boosting visible light-driven CO2 reduction to CH4

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-12-21 DOI:10.1016/j.apcatb.2023.123651

Wenjie He , Jing Xiong , Zhiling Tang , Yingli Wang , Xiong Wang , Hui Xu , Zhen Zhao , Jian Liu , Yuechang Wei

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Abstract

Herein, the photocatalysts of metallic Bi-modified TiO₂ microsphere (namely BTO) were synthesized by one-pot solvothermal method. The localized surface plasmon resonance (LSPR) effect of introduced metallic Bi nanoparticles is beneficial to improve the absorption efficiency for visible light, and its surface hot electrons can donate to the valence band of TiO₂ for boosting the separation efficiency of light generated electron-hole pairs. BTO catalysts exhibit the super catalytic activity for visible light-driven CO₂ reduction with H₂O to CH₄. The formation amount and selectivity of CH₄ product over BTO-2 catalyst are 49.12 μmol g⁻¹ and 85.48 % for 4 h, respectively. Based on the results of in-situ DRIFTS and density functional theory calculation, the mechanism for photocatalytic CO₂ reduction is proposed: the visible light-driven LSPR effect on BTO catalyst can boost the key step of CO₂* -to-HCO* for promoting selective generation of CH₄ product. It inspires the design of efficient photocatalysts for CO₂ conversion.

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Bi/TiO2 催化剂中铋纳米粒子的局部表面等离子体共振效应可促进可见光驱动的二氧化碳还原为 CH4

本文采用一锅溶热法合成了金属Bi修饰的TiO2微球（即BTO）光催化剂。引入的金属 Bi 纳米粒子的局域表面等离子体共振（LSPR）效应有利于提高可见光的吸收效率，其表面热电子可捐献给 TiO2 的价带，从而提高光产生的电子-空穴对的分离效率。BTO 催化剂在可见光驱动的 CO2 与 H2O 还原成 CH4 的过程中表现出超催化活性。在 BTO-2 催化剂上催化 4 小时，CH4 产物的生成量和选择性分别为 49.12 μmol g-1 和 85.48%。根据原位 DRIFTS 和密度泛函理论计算的结果，提出了光催化 CO2 还原的机理：可见光驱动的 LSPR 作用在 BTO 催化剂上可促进 CO2⁎到 HCO⁎的关键步骤，从而促进 CH4 产物的选择性生成。这对设计用于 CO2 转化的高效光催化剂具有启发意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.