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Preparation and Humidity Sensing Properties of MXene/CNF Composite Aerogels
Received:January 25, 2024  
DOI:10.11980/j.issn.0254-508X.2024.08.001
Key Words:CNF  MXene  liquid nitrogen directional freezing  aerogel  humidity sensor
Fund Project:国家自然科学基金项目(22308333); 浙江省“尖兵”“领雁”科技计划项目(2022C01066)。
Author NameAffiliationPostcode
SHEN Xiangling School of Environmental and Natural Resources Zhejiang University of Science & Technology Hangzhou Zhejiang Province 310023 310023
CHEN Guangjie School of Environmental and Natural Resources Zhejiang University of Science & Technology Hangzhou Zhejiang Province 310023 310023
GUO Daliang School of Environmental and Natural Resources Zhejiang University of Science & Technology Hangzhou Zhejiang Province 310023 310023
LI Jing School of Environmental and Natural Resources Zhejiang University of Science & Technology Hangzhou Zhejiang Province 310023 310023
TONG Xin School of Environmental and Natural Resources Zhejiang University of Science & Technology Hangzhou Zhejiang Province 310023 310023
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Abstract:In this study, the novel two-dimensional transition metal carbon and nitrogen material (MXene) was composited with cellulose nanofibers (CNF), and four different kinds of CNF composite aerogel sensors were prepared after freeze-drying by the liquid nitrogen directional and non-directional pre-freezing methods. The impacts of various types of CNF and MXene, with different liquid nitrogen pre-freezing methods on the morphology and structure of the MXene/CNF composite aerogels were investigated. The results showed that the oriented monolayer MXene/TOCNF composite aerogel had the most excellent morphology. Additionally, the humidity sensitivity test was conducted at relative humidity levels ranging from 11%~97%. The results revealed a three times of increase in response value at relative humidity of 97% with MXene dosage of 10%, indicating superior sensitive of the sensor to high humidity. Furthermore, the sensors demonstrated overall stablility within 14 days.
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