Citation: Jianze Xiao, Fu Zhihua, Guane Wang, Xiaoliang Ye, Gang Xu. Atomically Thin 2D TiO₂ Nanosheets with Ligand Modified Surface for Ultra-sensitive Humidity Sensor[J]. Chinese Journal of Structural Chemistry, ;2022, 41(4): 220405. doi: 10.14102/j.cnki.0254-5861.2022-0046 shu

Atomically Thin 2D TiO₂ Nanosheets with Ligand Modified Surface for Ultra-sensitive Humidity Sensor

Jianze Xiao ^{1, 2} ,
Fu Zhihua ² ,
Guane Wang ^{2, 3} ,
Xiaoliang Ye ^2,, ,
Gang Xu ^{2, 3, 4,,}

1.
College of Chemistry, Fuzhou University, Fuzhou 350116, China
2.
State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China

Corresponding author: Xiaoliang Ye, yexl@fjirsm.ac.cn Gang Xu, gxu@fjirsm.ac.cn
Received Date: 4 March 2022
Accepted Date: 29 March 2022

Figures(5)

As a kind of two-dimensional (2D) nanostructured materials, metal oxide nanosheets (MONS) are attractive and promising humidity sensing materials due to their considerable surface area, good charge carrier transportation, and designable surface functional groups properties. Nevertheless, the ultra-thin MONS modified with active functional groups for humidity sensing are still rare. As a proof of concept, the atomically thin TiO₂ nanosheets with high surface area and electron-donating amino groups are prepared by a structure-maintained post-ligand modification strategy. The fabricated TiO₂-based sensors demonstrate superior humidity sensing performance with high response, short response time, narrow hysteresis, and ultra-low theoretical limit of detection of about 15 ppm. Additionally, the possible mechanism is proposed from the AC complex impedance measurements and DC instantaneous reverse polarity experiments. This work provides a possible path for developing the high-performance 2D nanostructured metal oxides-based humidity materials through the surface chemical method.
- TiO₂ nanosheet,
- ligand modification,
- ultra-sensitive,
- chemiresistive,
- humidity sensing
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Atomically Thin 2D TiO2 Nanosheets with Ligand Modified Surface for Ultra-sensitive Humidity Sensor

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通讯作者: 陈斌, bchen63@163.com

Atomically Thin 2D TiO₂ Nanosheets with Ligand Modified Surface for Ultra-sensitive Humidity Sensor