Pd-Decorated ZnO Hexagonal Microdiscs for NH3 Sensor

Author:

Li Yi1,Zhang Boyu1,Li Juan1,Duan Zaihua1ORCID,Yang Yajie1,Yuan Zhen1,Jiang Yadong1,Tai Huiling1

Affiliation:

1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, China

Abstract

The NH3 sensor is of great significance in preventing NH3 leakage and ensuring life safety. In this work, the Pd-decorated ZnO hexagonal microdiscs are synthesized using hydrothermal and annealing processes, and the gas sensor is fabricated based on Pd-decorated ZnO hexagonal microdiscs. The gas-sensing test results show that the Pd-ZnO gas sensor has a good response to NH3 gas. Specifically, it has a good linear response within 0.5–50 ppm NH3 at the optimal operating temperature of 230 °C. In addition, the Pd-ZnO gas sensor exhibits good repeatability, short response time (23.2 s) and good humidity resistance (10–90% relative humidity). This work provides a useful reference for developing an NH3 sensor.

Funder

Natural Science Foundation of China

Publisher

MDPI AG

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