Zhou Tingting, Cao Shuang, Zhang Rui, Tu Jinchun, Fei Teng, Zhang Tong
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering , Jilin University , Changchun 130012 , P. R. China.
State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering , Hainan University , Haikou 570228 , P. R. China.
ACS Appl Mater Interfaces. 2019 Aug 7;11(31):28023-28032. doi: 10.1021/acsami.9b07546. Epub 2019 Jul 22.
Advanced sensing materials are in high demand for sensitive, real-time, and continuous detection of gas molecules for gas sensors, which have been becoming an effective tool for environmental monitoring and disease diagnosis. Cobalt-containing spinel oxides are promising sensing materials for the gas-sensing reaction owing to their element abundance and remarkable activity. Structural and component properties can be modulated to optimize the sensing performances by substituting Co with other transition metals. Herein, a systematic study of spinel MCoO oxides (M = Mn, Ni, and Zn) toward gas sensing is presented. Results show that ZnCoO materials with a multishelled hollow twin-sphere structure obtained excellent sensing performances to formaldehyde and acetone at different temperatures. The replacement of Co with Zn in the lattice improves the oxygen-chemisorbing ability, which allows new opportunities to synthesize and design highly sensitive chemical sensors.
先进的传感材料对于气体传感器灵敏、实时且连续地检测气体分子至关重要，气体传感器已成为环境监测和疾病诊断的有效工具。含钴尖晶石氧化物因其元素丰富和显著的活性，是用于气敏反应的有前景的传感材料。通过用其他过渡金属替代钴，可以调节结构和成分性质以优化传感性能。在此，对尖晶石MCoO氧化物（M = Mn、Ni和Zn）的气敏性能进行了系统研究。结果表明，具有多壳空心双球结构的ZnCoO材料在不同温度下对甲醛和丙酮具有优异的传感性能。在晶格中用Zn替代Co提高了氧化学吸附能力，这为合成和设计高灵敏度化学传感器提供了新机会。
