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Berlin Green Framework-Based Gas Sensor for Room-Temperature and High-Selectivity Detection of Ammonia

Tingqiang Yang Lingfeng Gao Wenxuan Wang Jianlong Kang Guanghui Zhao Delong Li Wen Chen Han Zhang

纳微快报（英文）2021，Vol.13Issue(4)：146-158,13.

Berlin Green Framework-Based Gas Sensor for Room-Temperature and High-Selectivity Detection of Ammonia

Berlin Green Framework?Based Gas Sensor for Room?Temperature and High?Selectivity Detection of Ammonia

Tingqiang Yang ¹Lingfeng Gao ¹Wenxuan Wang ²Jianlong Kang ¹Guanghui Zhao ³Delong Li ¹Wen Chen ²Han Zhang¹

作者信息

1. Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratoryof Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen 518060, People's Republic of China
2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, People's Republic of China
3. Research Center for Materials Genome Engineering, Wuhan University of Technology, Wuhan 430070, People's Republic of China
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摘要

Abstract

Ammonia detection possesses great potential in atmos-phere environmental protection, agriculture, industry, and rapid medical diagnosis. However, it still remains a great challenge to balance the sensitivity, selectivity, working temperature, and response/recovery speed. In this work, Berlin green (BG) framework is demonstrated as a highly promising sensing material for ammonia detection by both den-sity functional theory simulation and experimental gas sensing investiga-tion. Vacancy in BG framework offers abundant active sites for ammonia absorption, and the absorbed ammonia transfers sufficient electron to BG, arousing remarkable enhancement of resistance. Pristine BG framework shows remarkable response to ammonia at 50–110 ℃ with the highest response at 80 ℃, which is jointly influenced by ammonia's absorption onto BG surface and insertion into BG lattice. The sensing performance of BG can hardly be achieved at room temperature due to its high resistance. Introduction of conductive Ti3CN MXene overcomes the high resistance of pure BG framework, and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.

关键词

Berlin green framework/Gas sensor/Ammonia/Room temperature/High selectivity

Key words

Berlin green framework/Gas sensor/Ammonia/Room temperature/High selectivity

引用本文复制引用

Tingqiang Yang,Lingfeng Gao,Wenxuan Wang,Jianlong Kang,Guanghui Zhao,Delong Li,Wen Chen,Han Zhang..Berlin Green Framework-Based Gas Sensor for Room-Temperature and High-Selectivity Detection of Ammonia[J].纳微快报（英文）,2021,13(4):146-158,13.

基金项目

The research was supported by the NationalNatural Science Foundation of China (Grant Nos. 61435010, 61675135, and 62005177), the National Natural Science Foun-dation for Young Scientists of China (Grant No. 61905161), and the Science and Technology Innovation Commission of Shenzhen (JCYJ20190808142415003). Authors also acknowledge the sup-port from Instrumental Analysis Center of Shenzhen University (Xili Campus). （Grant Nos. 61435010, 61675135, and 62005177）

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