广州化学2025，Vol.50Issue(6)：18-23,6.DOI:10.16560/j.cnki.gzhx.20250615
微纳形貌SnO2对甲醛的选择响应特性及过程特征分析
Selective Response Dynamics and Mechanistic Analysis of Micro/Nano-architected SnO2 toward Formaldehyde
摘要
Abstract
Sn-MOF precursors were structurally reconstructed via ablation method,yielding SnO2 with hierarchical micro/nano-morphology and polycrystalline features(denoted as mp-SnO2),which demonstrated exceptional formaldehyde-selective sensing characteristics.Systematic investigations were conducted on both the selectivity dynamics and response mechanisms of mp-SnO2 toward formaldehyde.The results revealed remarkable sensing performance at 70℃:a response value of 33.94 toward 50 ppm formaldehyde,rapid response/recovery kinetics(90 s/520 s),ultralow detection limit(0.23 ppm),and outstanding long-term stability(>20 days).The research suggests that the outstanding selective reactivity of mp-SnO2 to formaldehyde can be attributed to its unique polycrystalline structure,high oxygen vacancy concentration,micro-nano morphological characteristics,and extensive specific surface area.These attributes contribute to its superior selective adsorption and rapid equilibrium reaction performance for formaldehyde.关键词
多晶态结构/微纳形貌/mp-SnO2/甲醛传感器/选择响应特性/过程特征Key words
polycrystalline structure/micro-nano morphology/mp-SnO2/formaldehyde sensor/selective response characteristics/process characteristics分类
化学化工引用本文复制引用
胡悦,龚云鹏,曹立久,马旭,魏丹蕊,桑柳波,唐毅,陈玉放..微纳形貌SnO2对甲醛的选择响应特性及过程特征分析[J].广州化学,2025,50(6):18-23,6.基金项目
重庆自然科学基金(CSTB2022NSCQ-MSX0986) （CSTB2022NSCQ-MSX0986）
