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WO3 Nanoplates Decorated with Au and SnO2 Nanoparticles for Real-Time Detection of Foodborne Pathogens

文献类型： 外文期刊

作者： Li, Xueyan 1 ; Wu, Zeyi 1 ; Song, Xiangyu 1 ; Li, Denghua 2 ; Liu, Jiajia 1 ; Zhang, Jiatao 1 ;

作者机构： 1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Mat, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Agr Informat Inst, Key Lab Agr Informat Serv Technol Minist Agr, Minist Agr, Beijing 100081, Peoples R China

3.Beijing Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Med Mol Sci & Pharmaceut Engn, Beijing 100081, Peoples R China

4.Beijing Inst Technol, MOE Key Lab Cluster Sci, Beijing 100081, Peoples R China

关键词： Au/SnO2-WO3 nanoplates; photochemical deposition; 3-hydroxy-2-butanone

期刊名称：NANOMATERIALS （ 影响因子：5.3； 五年影响因子：5.4 ）

ISSN：

年卷期： 2024 年 14 卷 8 期

页码：

收录情况： SCI

摘要： Nowadays, metal oxide semiconductor gas sensors have diverse applications ranging from human health to smart agriculture with the development of Internet of Things (IoT) technologies. However, high operating temperatures and an unsatisfactory detection capability (high sensitivity, fast response/recovery speed, etc.) hinder their integration into the IoT. Herein, a ternary heterostructure was prepared by decorating WO3 nanoplates with Au and SnO2 nanoparticles through a facial photochemical deposition method. This was employed as a sensing material for 3-hydroxy-2-butanone (3H-2B), a biomarker of Listeria monocytogenes. These Au/SnO2-WO3 nanoplate-based sensors exhibited an excellent response (R-a/R-g = 662) to 25 ppm 3H-2B, which was 24 times higher than that of pure WO3 nanoplates at 140 degrees C. Moreover, the 3H-2B sensor showed an ultrafast response and recovery speed to 25 ppm 3H-2B as well as high selectivity. These excellent sensing performances could be attributed to the rich Au/SnO2-WO3 active interfaces and the excellent transport of carriers in nanoplates. Furthermore, a wireless portable gas sensor equipped with the Au/SnO2-WO3 nanoplates was assembled, which was tested using 3H-2B with known concentrations to study the possibilities of real-time gas monitoring in food quality and safety.

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