| Title: | Conductometric acetone vapor sensor based on the use of gold-doped three-dimensional hierarchical porous zinc oxide microspheres |
| Author(s): | Xu S; Zhang H; Qi L; Xiao L; |
| Address: | "Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, People's Republic of China. xushengrui@htu.edu.cn. Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution and Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, People's Republic of China. xushengrui@htu.edu.cn. Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, People's Republic of China. Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution and Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, People's Republic of China" |
| DOI: | 10.1007/s00604-019-3457-y |
| ISSN/ISBN: | 1436-5073 (Electronic) 0026-3672 (Linking) |
| Abstract: | "A versatile nanoprobe for acetone vapor was designed and fabricated. It is based on the use of gold-doped three-dimensional (3D) hierarchical porous zinc oxide microspheres (Au/ZnO HPMSs). The nanoprobe was synthesized by annealing zinc hydroxide carbonate precursor (obtained by a hydrothermal method) doped with gold nanoparticles. The resulting products possess a 3D open framework structure built of 2D porous nanosheets with a nanoporous wormhole-like shape. The microspheres doped with 0.5 mol% gold display a good selectivity towards acetone. The conductometric nanoprobe, typically operated at a voltage of 5 V, can detect sub-ppm levels of acetone, and the detection limit is as low as 0.2 ppm. The response (at a level of up to 100 ppm of acetone at 325 degrees C) was high (74 +/- 1.9), and the response and recovery time are 6 and 3 s, respectively. This superior performance is ascribed (a) to the hierarchical porous ZnO architecture that warrants a large surface area; and (b) to the presence of gold nanoparticles that facilitate the chemisorption and dissociation of gas molecules. Graphical abstract Gold-doped 3D hierarchical porous ZnO microspheres (Au/ZnO HPMSs) architectures assembled by interconnected 2D porous nanosheets structures. The resistive sensor using these Au/ZnO HPMSs demonstrates outstanding acetone vapor sensing behaviors and 0.2 ppm detection limits" |
| Keywords: | Acetone vapor Diagnosis Gold-doped zinc oxide Hydrothermal method Nanoprobe Rapid response Selectivity Sub-ppm detection Type-I diabetes Volatile organic compounds; |
| Notes: | "PubMed-not-MEDLINEXu, Shengrui Zhang, Haibing Qi, Lan Xiao, Li eng Research Support, Non-U.S. Gov't Austria 2019/05/12 Mikrochim Acta. 2019 May 10; 186(6):342. doi: 10.1007/s00604-019-3457-y" |
