Novel PtCu/MIL-101(Cr) for efficient degradation of bisphenol A: Photothermal synergism promoted by the localized surface plasmon resonance effect

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2024-09-19 DOI:10.1016/j.apcata.2024.119968

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引用次数: 0

Abstract

Semiconductor photocatalysis is one of the most useful methods to solve environmental pollution problems. Herein, nanomaterial PtCu/MIL-101(Cr) was produced by an improved hydrothermal technique. The composite exhibited excellent photocatalytic performance with 99.7 % BPA degradation under 100 min visible light irradiation. First, the PtCu alloy has the effect of the local surface plasmon resonance effect, which can convert the photons to hot electrons and increase the reaction temperature. The synergistic effect (1+1>2) between photocatalysis and thermocatalysis significantly improved the photocatalytic efficiency. Second, the bimetallic alloying lowered the metals' work function and reduced the Schottky barrier between the PtCu alloy and MIL-101(Cr), which effectively promoted the carrier transfer. The ·O₂^-, ·OH and h⁺ were dominant reactive substances in the degradation process. The intermediates and degradation pathways of BPA were analyzed by 3D-EEM. The reaction mechanism was proposed based on theoretical calculations and experimental analysis. This work provides new directions for designing photothermal synergistic green catalysts and purifying the environment.

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用于高效降解双酚 A 的新型 PtCu/MIL-101(Cr)：局部表面等离子体共振效应促进的光热协同作用

半导体光催化是解决环境污染问题最有用的方法之一。本文采用改进的水热技术制备了纳米材料 PtCu/MIL-101(Cr)。该复合材料具有优异的光催化性能，在 100 分钟可见光照射下，双酚 A 的降解率达到 99.7%。首先，PtCu 合金具有局部表面等离子体共振效应，可将光子转化为热电子，提高反应温度。光催化与热催化之间的协同效应（1+1>2）显著提高了光催化效率。其次，双金属合金化降低了金属的功函数，减少了 PtCu 合金与 MIL-101(Cr)之间的肖特基势垒，有效促进了载流子的转移。在降解过程中，-O2-、-OH 和 h+ 是主要的反应物质。利用 3D-EEM 分析了双酚 A 的中间产物和降解途径。在理论计算和实验分析的基础上，提出了反应机理。这项工作为设计光热协同绿色催化剂和净化环境提供了新的方向。

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 A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.