Highly Sensitive QCM Humidity Sensor Based on MOFs-Derived SnO2/Chitosan Hybrid Film

被引：34

作者：

Chen, Haonan ^{[1
,2
]}

Zhang, Dongzhi ^{[2
]}

Pan, Qiannan ^{[2
]}

Song, Xiaoshuang ^{[2
]}

机构：

[1] State Key Lab Petr Pollut Control, Beijing 102206, Peoples R China

[2] China Univ Petr East China, Coll Control Sci & Engn, Qingdao 266580, Peoples R China

来源：

IEEE SENSORS JOURNAL | 2021年 / 21卷 / 04期

关键词：

Humidity; Sensor phenomena and characterization; Sensitivity; Adsorption; Surface impedance; Hysteresis; Humidity sensor; metal organic frameworks; QCM technology; chitosan; bimodal exponential model;

D O I：

10.1109/JSEN.2020.3029431

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper demonstrated an accurate and reliable QCM humidity sensor based on metal-organic frameworks (MOFs)-derived SnO2/chitosan (CS) nanostructure. MOF-SnO2 nanoparticles with uniform size were derived from Sn-based MOFs. The morphologies and nanostructures of the MOF-SnO2/CS composite were characterized by multiple characterization techniques. The MOF-SnO2/CS composite based QCM humidity sensor exhibits high sensitivity (43.14 Hz/%RH), short response/recovery time (8 s/3 s), excellent selectivity, and fine long-term stability. Besides, the tests of finger approaching/sliding and human breathing based on MOF-SnO2/CS QCM humidity sensor were performed in this work, showing its potential applications in identifying humidity change and analyzing aspiration status. The resonant behavior of MOF-SnO2/CS QCM humidity sensor was analyzed by conductance spectrum. The adsorption and desorption processes of water molecules were analyzed by a bimodal exponential model, which reveals the adsorption and desorption dynamics of water molecules on the MOF-SnO2/CS composite.

引用

页码：4385 / 4390

页数：6

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