Enhanced Response for Foodborne Pathogens Detection by Au Nanoparticles Decorated ZnO Nanosheets Gas Sensor
Cheng Zhao,
Shanshan Xu,
Jing Wei,
Siqi Xie,
Jinlei Wei,
Jingting Han,
Zhaohuan Zhang,
Haiquan Liu,
Jinsheng Cheng,
Yong Zhao,
Yongheng Zhu
Affiliations
Cheng Zhao
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Shanshan Xu
State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Jing Wei
The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Institute of Analytical Chemistry and Instrument for Life Science, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Siqi Xie
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Jinlei Wei
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Jingting Han
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Zhaohuan Zhang
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Haiquan Liu
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Jinsheng Cheng
Henry-Fork School of Food Sciences, Shaoguan University, Shaoguan 512005, China
Yong Zhao
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Yongheng Zhu
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Listeria monocytogenes is a hazardous foodborne pathogen that is able to cause acute meningitis, encephalitis, and sepsis to humans. The efficient detection of 3-hydroxy-2-butanone, which has been verified as a biomarker for the exhalation of Listeria monocytogenes, can feasibly evaluate whether the bacteria are contained in food. Herein, we developed an outstanding 3-hydroxy-2-butanone gas sensor based on the microelectromechanical systems using Au/ZnO NS as a sensing material. In this work, ZnO nanosheets were synthesized by a hydrothermal reaction, and Au nanoparticles (~5.5 nm) were prepared via an oleylamine reduction method. Then, an ultrasonic treatment was carried out to modified Au nanoparticles onto ZnO nanosheets. The XRD, BET, TEM, and XPS were used to characterize their morphology, microstructure, catalytic structure, specific surface area, and chemical composition. The response of the 1.0% Au/ZnO NS sensors vs. 25 ppm 3-hydroxy-2-butanone was up to 174.04 at 230 °C. Moreover, these sensors presented fast response/recovery time (6 s/7 s), great selectivity, and an outstanding limit of detection (lower than 0.5 ppm). This work is full of promise for developing a nondestructive, rapid and practical sensor, which would improve Listeria monocytogenes evaluation in foods.
