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Single-atom nanozymes possessing robust multienzyme-mimetic catalytic properties for sensing of volatile alkaline gas

文献类型： 外文期刊

作者： Song, Guangchun 1 ; Zheng, Xiaochun 1 ; Zhang, Zedong 3 ; Fauconnier, Marie-Laure 2 ; Li, Cheng 1 ; Chen, Li 1 ; Zhang, Dequan 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Food Sci & Technol, Key Lab Agroprod Qual & Safety Control Storage & T, Minist Agr & Rural Affairs, Beijing 100193, Peoples R China

2.Univ Liege, Lab Chem Nat Mol, Gembloux Agrobio Tech, Passage Deportes 2, B-5030 Gembloux, Belgium

3.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

关键词： Single-atom nanozymes; Multienzyme-like; Nano-sensing detection; Volatile alkaline gas

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2024 年 500 卷

页码：

收录情况： SCI

摘要： Volatile alkaline gases (VAGs) emitted from various sources, such as the food or chemical industry, pose potential harm to the natural environment and human health. Therefore, the development of a real-time, rapid, and costeffective detection method is crucial. In this study, the enzyme-like catalytic types and activities of four different metal-based single-atom enzymes (Ga, Cu, Mn, and Zn SAzymes) were selected and evaluated. Among them, Ga SAzyme exhibited the most promising catalytic properties. Furthermore, the multienzyme catalytic properties of Ga SAzyme were utilized for the detection of ammonia, and it was found that its peroxidase-like (POD-like) activity showed a strong affinity for ammonia (Km = 0.05 mM). This detection strategy demonstrated high sensitivity, with a limit of detection (LOD) of 3.0 mM in the linear range of 0.01-0.05 M and 7.0 mM in the linear range of 0.075-0.25 M. Additionally, the method was characterized by fast response time (15 s) and low cost ($0.035 per sample). The proposed method holds great potential for the detection of VAGs from various sources in the future.

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