Preparation of ZnO1-x by peroxide thermal decomposition and its room temperature gas sensing properties

• 作者: Chao Zhang Ying Li Gui-Fang Liu Han-Lin Liao
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（3）
• 所属期刊栏目: LETTERS
• 页码范围: 871-876
• 页数: 6页
• 语种: 英文

摘要

The excessive concentration of NO2 in the atmosphere has gained considerable attention due to its damage to the environment and human health.Gas sensor technology has important application prospects in detecting atmospheric NO2 concentration.Restricted by its wide bandgap,pristine ZnO needs additional energy to power the electronic transition as a gas sensing material.To overcome the obvious shortcoming of traditional ZnO sensors,it is nec-essary to design and prepare ZnO-based sensors which can operate under visible light excitation at room temperature.The ZnO-based gas sensors rich in oxygen vacancies are produced by peroxide thermal decomposition.The gas sensors show prominent gas response to 1 x 10-6 NO2 under visible light at room temperature.From the combi-nation of characterizations and experiments,we can find that the concentration of oxygen vacancies has a close relationship with the time of peroxidation.The prolonged peroxidation treatment time has a positive impact on the oxygen vacancies concentration and gas sensing performance.