Ultrasensitive Chemiresistive Gas Sensors Based on Dual-Mesoporous Zinc Stannate Composites for Room Temperature Rice Quality Monitoring  

作　　者：Jinyong Xu Xuxiong Fan Kaichun Xu Kaidi Wu Hanlin Liao Chao Zhang 

机构地区：[1]College of Mechanical Engineering,Yangzhou University,Yangzhou 225127,People’s Republic of China [2]ICB UMR 6303,CNRS,Univ.Bourgogne Franche-Comté,UTBM,90010 Belfort,France

出　　处：《Nano-Micro Letters》2025年第5期359-373,共15页纳微快报(英文版)

基　　金：supported by the Outstanding Youth Foundation of Jiangsu Province of China(Grant No.BK20211548);the Yangzhou Science and Technology Plan Project(Grant No.YZ2023246)。

摘　　要：The integration of dual-mesoporous structures,the construction of heterojunctions,and the incorporation of highly concentrated oxygen vacancies are pivotal for advancing metal oxide-based gas sensors.Nonetheless,achieving an optimal design that simultaneously combines mesoporous structures,precise heterojunction modulation,and controlled oxygen vacancies through a one-step process remains challenging.This study proposes an innovative method for fabricating zinc stannate semiconductors featuring dual-mesoporous structures and tunable oxygen vacancies via a direct solution precursor plasma spray technique.As a proof of concept,the resulting zinc stannate-based coatings are applied to detect 2-undecanone,a key biomarker for rice aging.Remarkably,the zinc oxide/zinc stannate heterojunctions with a well-defined secondary pore structure exhibit exceptional gas-sensing performance for 2-undecanone at room temperature.Furthermore,practical experiments indicate that the developed sensor effectively identifies adulteration in various rice varieties.These results underscore the potential of this method for designing metal oxides with tailored properties for high-performance gas sensors.The enhanced adsorption capacity and dual-mesoporous features of this semiconductor make it a promising candidate for sensing applications in agricultural food safety inspections.

关 键 词：Zinc stannate SEMICONDUCTORS Dual-mesoporous structure Gas sensor Biomarker sensing 

分 类 号：O61[理学—无机化学]