In situ growth of bismuth oxybromide/bismuth molybdate 2D/2D Z-scheme heterojunctions with rich interfacial oxygen vacancies for photocatalytic benzylic C(sp3)-H bond activation

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL Journal of Colloid and Interface Science Pub Date : 2024-11-30 DOI:10.1016/j.jcis.2024.11.233

Songting Gu , Chenyu Li , Xinyan Lin , Xiaotong Lin , Yingxi Xiao , Xiaoyang Zhao , Junmin Nan , Xin Xiao

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Abstract

The selective oxidation of toluene into valuable chemicals via photocatalytic C(sp³)-H bond activation represents a significant, yet challenging process. Here, the in situ construction of bismuth oxybromide/bismuth molybdate (BiOBr/Bi₂MoO₆) 2D/2D Z-scheme heterojunctions featuring interface-induced oxygen vacancies (OVs) is introduced. The optimized BiOBr/Bi₂MoO₆ sample has a remarkable yield rate of benzaldehyde at 2134.28 μmol g⁻¹ h⁻¹ under blue LED irradiation, surpassing the performance of BiOBr and Bi₂MoO₆ by 8.1 and 2.9 times, respectively. Insights from density functional theory (DFT) calculations, electron paramagnetic resonance (EPR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies highlight the critical role of the Z-scheme electronic configuration and OVs in attaining the superior photocatalytic toluene conversion efficiency. This study advances the photocatalytic conversion of benzaldehyde within an OV-enhanced direct Z-scheme system, facilitating the activation of inert C(sp³)-H bonds, and contributes to the development of high-performance catalysts for sustainable chemical processes.

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原位生长的氧溴化铋/钼酸铋2D/2D z型异质结具有丰富的界面氧空位，用于光催化苯基C(sp3)-氢键活化。

通过光催化C(sp3)-氢键活化将甲苯选择性氧化成有价值的化学物质是一个重要但具有挑战性的过程。本文介绍了具有界面诱导氧空位（OVs）的氧化溴化铋/钼酸铋（BiOBr/Bi2MoO6） 2D/2D Z-scheme异质结的原位构建。优化后的BiOBr/Bi2MoO6样品在蓝光LED照射下苯甲醛的产率为2134.28 μmol g-1 h-1，分别是BiOBr和Bi2MoO6的8.1倍和2.9倍。密度泛函理论（DFT）计算、电子顺磁共振（EPR）和原位漫反射红外傅立叶变换光谱（DRIFTS）研究的见解强调了Z-scheme电子构型和OVs在获得优异光催化甲苯转化效率方面的关键作用。本研究在ov增强的直接Z-scheme体系中推进了苯甲醛的光催化转化，促进了惰性C(sp3)-H键的激活，并为可持续化学过程的高性能催化剂的开发做出了贡献。

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来源期刊

Journal of Colloid and Interface Science 化学-物理化学

CiteScore

16.10

自引率

7.10%

发文量

2568

审稿时长

2 months

期刊介绍： The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies