分析化学2024，Vol.52Issue(8)：1141-1151,11.DOI:10.19756/j.issn.0253-3820.231380
金属有机框架衍生微花状NiO-In2O3复合结构的制备及其对超低浓度甲醛气体检测性能的研究
Preparation of Metal Organic Framework-derived Microflower-Like NiO-In2O3 Composite Structure and Its Detection Performance for Ultra-Low Concentration of Formaldehyde Gas
摘要
Abstract
Formaldehyde is a prevalent organic solvent in industrial and indoor environment,which can seriously harm human health,so it is of great significance to develop highly sensitive formaldehyde sensors with fast response,low detection limit and long life.In this study,the NiO-In2O3 composite structure was prepared using indium-based metal organic framework(In-MOF)as the precursor,and the formaldehyde gas sensor was constructed with In2O3 and NiO-In2O3 composite structure as the sensitive material.The results demonstrated that the In2O3 material had a microflower-like structure,while the NiO-In2O3 composite structure was composed of NiO nanoparticles attached to the surface of In2O3.The sensor exhibited excellent detection performance for formaldehyde in the environment of relative humidity of 33%and 75%,especially the response characteristic of the NiO-In2O3 composite structure sensor to formaldehyde was considerably better than that of the In2O3 sensor under the same test conditions,which was closely related to the catalytic effect of NiO and the heterogeneous structure formed between NiO and In2O3.The NiO-In2O3 composite structure sensor had a response value of 21.3 and 12.6 to 10 μL/L formaldehyde when the relative humidity was 33%and 75%at 200℃.The response/recovery time was 4/6 s and 7/10 s,and the limit of detection(LOD)was 1.2×10-7 μL/L and 4.1×10-5 μL/L respectively.Meanwhile,the sensor had excellent selectivity and long-term stability.This sensor showed a wide application prospect in the field of high-performance detection of low concentration of formaldehyde gas.关键词
金属有机框架/氧化镍与氧化铟复合结构/气体传感器/甲醛检测Key words
Metal organic framework/Nickel oxide and indium oxide composite structure/Gas sensor/Detection of formaldehyde引用本文复制引用
罗翠线,侯娇红,贾文涛,王大铭,薛令荣..金属有机框架衍生微花状NiO-In2O3复合结构的制备及其对超低浓度甲醛气体检测性能的研究[J].分析化学,2024,52(8):1141-1151,11.基金项目
国家自然科学基金项目(Nos.62105190,61903239)和山西省自然科学基金项目(Nos.20210302124559,202303021221185)资助. Supported by the National Natural Science Foundation of China(Nos.62105190,61903239)and the Natural Science Foundation of Shanxi Province,China(Nos.20210302124559,202303021221185). （Nos.62105190,61903239）
