Copper(II) ion-modified ZSM-5/TiO2 composite material for photocatalytic degradation of ammonia gas

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-04-30 DOI:10.1016/j.jphotochem.2025.116472

Jiaming Zhu , Renli Qi , Kun Tian , Shuhang Lu , Shihua Pu , Yue Jian

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Abstract

Ammonia gas (NH₃), as a malodorous gas, has an irritating and corrosive effect on the upper respiratory tract of humans or animals. In this work, we successfully synthesized copper(II) (Cu(II)) ion-modified Zeolite Socony Mobil–5 (ZSM-5) and TiO₂ composite material (Cu/ZSM-5/TiO₂, CZT). This composite material, compared to ZSM-5 and anatase-TiO₂ (A-TiO₂) themselves, had a wide absorption range, a large specific surface area, and strong light harvesting and charge transfer capabilities. Due to the abundant Lewis acid active sites on the CZT surface, it was applied to the photocatalytic degradation of alkaline malodorous NH₃. The CZT composite catalyst showed excellent photocatalytic performance, and it could degrade NH₃ with a concentration of 30 mg/m³ in less than 20 min. Moreover, the CZT catalyst exhibited good stability. Importantly, NH₃ was mineralized into nitrate anions, achieving the harmless treatment of NH₃ gas.

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铜（II）离子改性ZSM-5/TiO2复合材料光催化降解氨气

氨气（NH3）是一种恶臭气体，对人或动物的上呼吸道有刺激性和腐蚀性作用。在这项工作中，我们成功地合成了铜（II）（Cu(II)）离子修饰的沸石Socony mobile -5 （ZSM-5）和TiO2复合材料（Cu/ZSM-5/TiO2， CZT）。与ZSM-5和锐钛矿- tio2 （a - tio2）本身相比，该复合材料具有较宽的吸收范围、较大的比表面积以及较强的光捕获和电荷转移能力。由于CZT表面具有丰富的Lewis酸活性位点，因此将其应用于光催化降解碱性恶臭NH3。CZT复合催化剂表现出优异的光催化性能，能在不到20 min的时间内降解浓度为30 mg/m3的NH3，且具有良好的稳定性。重要的是，NH3被矿化成硝酸盐阴离子，实现了NH3气体的无害化处理。

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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.