Enhanced photocatalytic degradation of norfloxacin via SPR effect in CuNi/TiO2-x composite under visible light

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-08-21 DOI:10.1016/j.jphotochem.2025.116710

Shishu Sun , Tianyi Sun , Dashuai Zhang , Jinrui Liu , Liying Ren , Chuilong Chen , Wei Yao , Zaifeng Shi

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Abstract

In this paper, the synthesis, characterization, and photocatalytic performance of CuNi/TiO_2-x composites in the degradation of antibiotic Norfloxacin (NOR) under visible light were investigated. Compared to conventional TiO₂, the composite catalyst demonstrated superior photocatalytic activity by introducing CuNi nanoparticles and oxygen vacancy in TiO₂. The oxygen vacancy defect in titanium dioxide crystal reduced the band gap energy. In addition, the incorporation of Cu nanoparticles leveraging Surface Plasmon Resonance (SPR) and Ni nanoparticles as electron traps further markedly enhanced the electron-hole pair separation efficiency and solar energy utilization, catalyzing NOR degradation efficiently. Electron Spin Resonance (ESR) confirmed the generation of reactive oxygen species, which was pivotal to the NOR degradation. This study underscores the potential of bimetallic composites for environmental remediation, particularly in treating antibiotic-laden wastewater.

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可见光下利用SPR效应增强CuNi/TiO2-x复合材料对诺氟沙星的光催化降解

本文研究了CuNi/TiO2-x复合材料的合成、表征及其在可见光下降解抗生素诺氟沙星（NOR）的光催化性能。与传统TiO2相比，该复合催化剂通过在TiO2中引入CuNi纳米粒子和氧空位，表现出优异的光催化活性。二氧化钛晶体中的氧空位缺陷降低了带隙能。此外，利用表面等离子体共振（SPR）的Cu纳米粒子和作为电子陷阱的Ni纳米粒子的加入进一步显著提高了电子-空穴对分离效率和太阳能利用率，有效地催化了NOR的降解。电子自旋共振（ESR）证实了活性氧的生成，这是NOR降解的关键。这项研究强调了双金属复合材料在环境修复方面的潜力，特别是在处理含抗生素废水方面。

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

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.