用缺陷ZSM-5、CuO和Ag对纳米tio2进行多组分改性以增强光催化和抗菌性能

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-13 DOI:10.1016/j.jphotochem.2025.116787

Cheng Wang, Xinchao Liang, Lipeng Wang, Qianru Yu, Fuling Du, Siqi Liu, Xingchi Yao, Dingguo Zhai

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引用次数: 0

摘要

通过浸渍-煅烧和离子交换/光还原的方法，设计了多组分tio2基纳米复合材料，将有缺陷的ZSM-5、CuO和Ag与纳米tio2结合，以协同增强光催化和抗菌功能。通过XRD、FTIR、XPS、EDX、TEM、N2吸附-解吸技术、PL、EIS、UV-vis DRS和EPR等综合表征，证实了组分的成功集成，并揭示了关键的结构和电子性能。CuO/TiO2/ZSM-5和Ag/CuO/TiO2/ZSM-5复合材料的比表面积显著增大（分别为338 m2/g和326 m2/g），可见光吸收范围扩大（分别为532 nm和422 nm），载流子复合受到抑制。在紫外/可见光和黑暗条件下，甲基橙降解和大肠杆菌灭活的评价显示出卓越的性能。缺陷ZSM-5（提供活性位点和吸附能力）、CuO/Ag（促进电子捕获和等离子体效应）和TiO2之间的协同作用导致光自由基产率（例如•OH、•O2−）的提高，从而显著提高了光催化效率（CuO/TiO2/ZSM-5和Ag/CuO/TiO2/ZSM-5复合材料的MO去除率分别为99%和93%）和广谱抗菌活性。即使在没有光线的情况下（在黑暗和预照射条件下，CuO/TiO2/ZSM-5的大肠杆菌失活率分别为75.2%和83.3%；Ag/CuO/TiO2/ZSM-5在两种条件下的失活率均为>； 99%）。

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Multicomponent modification of nano-TiO2 with defective ZSM-5, CuO and Ag for enhanced photocatalytic and antibacterial performance

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Multicomponent modification of nano-TiO2 with defective ZSM-5, CuO and Ag for enhanced photocatalytic and antibacterial performance

Multicomponent TiO₂-based nanocomposites were engineered via impregnation-calcination and ion exchange/photoreduction methods, incorporating defective ZSM-5, CuO, and Ag with nano-TiO₂ to synergistically enhance photocatalytic and antibacterial functionalities. Comprehensive characterization using XRD, FTIR, XPS, EDX, TEM, N₂ sorption-desorption technique, PL, EIS, UV–vis DRS, and EPR confirmed the successful integration of components and revealed critical structural and electronic properties. The CuO/TiO₂/ZSM-5 and Ag/CuO/TiO₂/ZSM-5 composites demonstrated significantly enlarged specific surface area (338 m²/g and 326 m²/g, respectively), extended visible-light absorption (532 nm and 422 nm, respectively), and suppressed charge-carrier recombination. Evaluations using methyl orange degradation and Escherichia coli inactivation under UV/visible light and dark conditions revealed exceptional performance. The synergistic effects among defective ZSM-5 (providing active sites and adsorption capacity), CuO/Ag (facilitating electron trapping and plasmonic effects), and TiO₂ resulted in elevated photogenerated radical yields (e.g., •OH, •O₂⁻), driving remarkable enhancements in both photocatalytic efficiency (99 % and 93 % of MO removal for CuO/TiO₂/ZSM-5 and Ag/CuO/TiO₂/ZSM-5 composites, respectively), and broad-spectrum antibacterial activity, even in the absence of light (75.2 % and 83.3 % E. coli inactivation for CuO/TiO₂/ZSM-5 under dark and pre-irradiation conditions; >99 % for Ag/CuO/TiO₂/ZSM-5 under both conditions).

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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.