Enhancing photothermal selective oxidation performance of benzyl alcohol on hierarchical Bi2MoO6 spheres with in-situ oxygen vacancy modulation via photothermal induced defect engineering

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-16 DOI:10.1016/j.apcata.2025.120575

Wen Ma , Jia-Hao Gao , Wen-Tao Wang , Sheng Qi , Teng Chen , Ying-Mei Zhou , Hong-Zi Tan , Jian-Feng Diao , Kai-Qiang Jing , Ling Wu

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引用次数: 0

Abstract

Transforming chemical products into high value-added products via green photocatalysis or thermocatalysis has triggered much interest. However, most researchers achieve this green organic synthesis process by photo or thermocatalysis independently. Meanwhile, the effect of photothermal synergy for enhancing benzyl alcohol (BA) oxidation catalytic performance are unclear yet. Herein, the photothermal effect stimulated the increase of oxygen vacancies (OVs) concentration over the hierarchical Bi₂MoO₆ spheres (H-BMO-S) is investigated for the photothermal synergy selective oxidation of benzyl alcohol under the irradiation of visible light. Massive experimental results indicate that the H-BMO-S can produce abundant OVs with the reactive temperature increasing and visible light irradiation. The H-BMO-S sample exhibits 60.3 % conversion of BA under the reactive temperature at 70 °C, which is almost 1.8-fold in contrast to that of the H-BMO-S sample (34.4 %) at 25 °C. The elevated catalytic activity is ascribed to the analysis results that the enhanced OVs concentration can lengthen the lifetime of carriers, facilitate the separation of electrons and holes, and achieve the adsorption and activation of benzyl alcohol and oxygen molecules effortlessly. This work elucidates a strategy to enhancing the benzyl alcohol oxidation catalytic activity via defect engineering induced by photothermal synergy effect.

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基于原位氧空位调制的光热诱导缺陷工程增强苯甲醇在Bi2MoO6球上的光热选择性氧化性能

通过绿色光催化或热催化将化工产品转化为高附加值产品引起了人们的极大兴趣。然而，大多数研究人员通过光催化或热催化独立实现了这一绿色有机合成过程。同时，光热协同作用对提高苯甲醇（BA）氧化催化性能的影响尚不清楚。本文研究了在可见光照射下，光热效应刺激下Bi2MoO6球（H-BMO-S）上氧空位（OVs）浓度的增加，从而对苯甲醇进行光热协同选择性氧化。大量实验结果表明，随着反应温度的升高和可见光的照射，H-BMO-S可以产生丰富的OVs。反应温度为70℃时，H-BMO-S样品的BA转化率为60.3 %，是25℃时H-BMO-S样品（34.4 %）的1.8倍。分析结果表明，提高的OVs浓度可以延长载流子的寿命，促进电子和空穴的分离，轻松实现对甲醇和氧分子的吸附和活化。本工作阐明了利用光热协同效应诱导缺陷工程来提高苯甲醇氧化催化活性的策略。

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.