Moisture-resisting acetone sensor based on MOF-derived ZnO-NiO nanocomposites. (February 2022)

• Record Type: Journal Article
• Authors: Sun, Yongjiao; Zhao, Zhenting; Suematsu, Koichi; Li, Pengwei; Zhang, Wendong; Hu, Jie
• Is Part Of: Materials research bulletin. Volume 146(2022)
• Publication Date: 2022-02
• Subjects: Metal-organic framework -- ZNO-x -- Gas sensor -- Acetone -- Moisture-resistance; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111607
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: ZNO-x nanocomposites with different ratio of Ni and Zn were synthesized by calcinating the metal-organic framework (ZNOF-x). Gas sensors based on ZNO-x present lower and lower sensitivity but better and better moisture-resistance performance toward acetone with increasing the amount of Ni. ZNO-5 exhibits a relative high sensitivity and excellent water-vapour resistance performance, which is a promising material to detect acetone in exhaled gases for the non-invasive diagnosis of diabetes. Abstract: Metal-organic frameworks (MOF) with different Zn and Ni ratios (ZNOF- x ) were synthesized by one-step solvothermal method without any surfactant. The ratio of Zn and Ni significantly affect the morphology of the ZNOF- x . Subsequently, MOF-derived ZnO-NiO (ZNO- x ) was obtained after the calcination in air atmosphere. Gas sensing experimental was conducted on the as-fabricated ZNO- x sensors, and the measured results demonstrate that ZNO- x -based gas sensor presents lower acetone sensitivity but higher moisture-resistance performance with increasing the amount of Ni under ultra humid atmospheres. Especially, ZNO-5-based sensor exhibits a relative high sensitivity (1.31 to 1 ppm acetone in 95% RH atmosphere) and excellent water-vapour resistance performance (S95%/S11% > 0.8 at 175 °C), as well as good response and rapid response/recovery speed for the acetone sensing. Therefore, ZNO-5 is a promising material for acetone detecting in a high humid environment, which is a potential sensing material for the diagnosis of diabetes through exhaled gases analysis. Graphical abstract: The obtained ZNO-5 gas sensors exhibit relative high sensitivity and excellent water-vapour resistance, which is potential and promising sensing materials for non-invasive diagnosis of diabetes through exhaled analysis. Image, graphical abstract