Solvothermal regulation of BiOBr catalyst structure for improved photocatalytic tetracycline degradation

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-03-06 DOI:10.1016/j.jphotochem.2025.116377

Yue Ding , Jiaou Qi , Weixiong Huang , Ping Chen , Yanglai Hou , Lilin Lu

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Abstract

Enhancing charge-separation efficiency and suppressing recombination of photoexcited carriers are the key to photocatalysts. In this work, a novel solvothermal strategy has been developed to regulate the structure of BiOBr catalysts, three BiOBr catalysts are prepared by solvothermal procedure using water, ethanol and ethylene glycol as the solvents, and denoted as BiOBr-W, BiOBr-ET and BiOBr-EG, respectively. Among them, the BiOBr-EG exhibits substantially improved catalytic activity for tetracycline degradation. Catalyst characterizations reveal that the BiOBr-EG possesses high specific surface area, more oxygen vacancies and an electron-rich surface. High photocurrent response and low photoluminescence (PL) intensity indicate enhanced charge-separation efficiency and suppressed recombination of photogenerated electron-hole pairs. The low conduction-band potential of BiOBr-EG favors production of superoxide free radicals and tetracycline degradation. This work opens up new opportunities for developing high-performance BiOBr catalysts by structure regulation to improve charge separation efficiency and suppress the recombination of photogenerated electron-hole pairs in photocatalysis.

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改善光催化四环素降解的BiOBr催化剂结构的溶剂热调控

提高电荷分离效率和抑制光激发载流子的复合是光催化剂的关键。本研究开发了一种新的溶剂热策略来调节BiOBr催化剂的结构，采用溶剂热方法以水、乙醇和乙二醇为溶剂制备了三种BiOBr催化剂，分别记为BiOBr- w、BiOBr- et和BiOBr- eg。其中，BiOBr-EG对四环素的降解具有显著提高的催化活性。催化剂表征表明，bibr - eg具有较高的比表面积、更多的氧空位和富电子表面。高的光电流响应和低的光致发光（PL）强度提高了电荷分离效率，抑制了光生电子-空穴对的复合。BiOBr-EG的低导带电位有利于超氧自由基的产生和四环素的降解。通过结构调控提高电荷分离效率，抑制光催化中产生的电子-空穴对的重组，为开发高性能BiOBr催化剂开辟了新的机遇。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.