Ppb-level unsymmetrical dimethylhydrazine detection based on In2O3 hollow microspheres with Nd doping

Weiyi Bu; You Zhou; Dan Huang; Na Liu; Yan Zhang; Wenjiang Han; Xiaohong Chuai; Zhijie Zhou; Changhua Hu; Geyu Lu

doi:10.1016/j.jhazmat.2024.134508

Ppb-level unsymmetrical dimethylhydrazine detection based on In₂O₃ hollow microspheres with Nd doping

J Hazard Mater. 2024 Jul 5:472:134508. doi: 10.1016/j.jhazmat.2024.134508. Epub 2024 May 4.

Authors

Weiyi Bu¹, You Zhou¹, Dan Huang², Na Liu¹, Yan Zhang¹, Wenjiang Han¹, Xiaohong Chuai³, Zhijie Zhou², Changhua Hu², Geyu Lu¹

Affiliations

¹ State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
² High-Tech Institute of Xi'an, Xi'an, Shaanxi Province 710025, China.
³ State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China. Electronic address: xhchuai@jlu.edu.cn.

PMID: 38754234
DOI: 10.1016/j.jhazmat.2024.134508

Abstract

As one of main high-energy fuels for rocket launching, unsymmetrical dimethylhydrazine (UDMH) and its decomposition products do harm to environment and human health. It is significant to develop a device to monitor its leakage. In this work, a UDMH gas sensor based on In₂O₃ hollow microspheres with Nd dopant was fabricated. The pure, 1.0 mol%, 3.0 mol% and 5.0 mol% Nd doped In₂O₃ were synthesized via one-step solvothermal method. Among them, 3.0% Nd-In₂O₃ based sensor exhibits the highest response toward UDMH vapor. Its response value to 100 ppm UDMH is 183.3 at optimal working temperature of 250 °C, 6.8 times higher than that of pure In₂O₃ (26.8). Besides high response to UDMH, the 3% Nd-In₂O₃ based sensor represents excellent selectivity, rapid response speed (2 s) and ultra-low theoretical LOD to UDMH (0.28 ppb). The improved gas sensing performance via Nd doping could be attributed to the enhanced specific surface area, increased concentration of adsorbed oxygen and improved adsorption capacity for UDMH molecular on the surface. The excellent sensing performance of Nd doped In₂O₃ hollow microspheres makes it a promising candidate for real-time UDMH detection.

Keywords: Hollow microspheres; Nd doped In(2)O(3); One-step solvothermal method; UDMH detection.