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Loading uniform Ag3PO4 nanoparticles on three-dimensional peony-like WO3 for good stability and excellent selectivity towards NH3 at room temperature |
| Xingyan Shao(邵星炎)1,2, Fuchao Jia(贾福超)1,†, Tingting Liu(刘婷婷)1,2, Jiancheng Liu(刘健诚)1, Xiaomei Wang(王小梅)1, Guangchao Yin(尹广超)1, Na Lv(吕娜)3, Tong Zhou(周通)1, Ramachandran Rajan1,4, and Bo Liu(刘波)1,2,‡ |
1. Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China;
2. School of Material Science and Engineering, Shandong University of Technology, Zibo 255000, China;
3. Provincial Key Laboratory of Network Based Intelligent Computing, University of Jinan, Jinan 250022, China;
4. Translational Medical Center, Zibo Central Hospital, Zibo 255036, China |
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Abstract A heterojunction structure design is a very good method for improving the properties of semiconductors in many research fields. This method is employed in the present study to promote the gas-sensing performance of Ag3PO4 nanocomposites at room temperature (25 ℃). A nanocomposite of Ag3PO4 nanoparticles and three-dimensional peony-like WO3 (WO3/Ag3PO4) was successfully prepared by the precipitation method. The crystalline phases were analyzed by x-ray diffraction and the microstructure was characterized by scanning electron microscopy and transmission electron microscopy. The chemical bonding states were analyzed by x-ray photoelectron spectroscopy. The gas-sensing performance of WO3/Ag3PO4 sensors was systematically explored at room temperature. The composite sensors possessed a higher response and lower detection limit (1 ppm) to NH3 than those made of a single type of material; this is ascribed to the synergistic effect achieved by the heterojunction structure. Among the different composite sensors tested, gas sensor A5W5 (Ag3PO4:WO3 mass ratio of 5:5) displayed the highest response to NH3 at room temperature. Interestingly, the A5W5 gas sensor exhibited relatively good stability and excellent selectivity to NH3. The A5W5 sensor also displayed a relatively good response under high humidity. The gas-sensing mechanism of the WO3/Ag3PO4 sensors is explained in detail. Taken together, the as-prepared sensor is highly efficient at detecting NH3 and could be suitable for practical applications. In addition, this study also provides a new method for developing Ag3PO4-based sensors in the gas-sensing field.
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Received: 20 May 2022
Revised: 05 October 2022
Accepted manuscript online: 10 October 2022
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PACS:
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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| Fund: The authors sincerely acknowledge the financial support from the Collaborative Education Project of Industry-University Cooperation of the Ministry of Education of China (Grant No.202101256024) and the National Natural Science Foundation of China (Grant Nos.11904209 and 61802144). |
Corresponding Authors:
Fuchao Jia, Bo Liu
E-mail: jiafuchao@sdut.edu.cn;liub@sdut.edu.cn
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Cite this article:
Xingyan Shao(邵星炎), Fuchao Jia(贾福超), Tingting Liu(刘婷婷), Jiancheng Liu(刘健诚), Xiaomei Wang(王小梅), Guangchao Yin(尹广超), Na Lv(吕娜), Tong Zhou(周通), Ramachandran Rajan, and Bo Liu(刘波) Loading uniform Ag3PO4 nanoparticles on three-dimensional peony-like WO3 for good stability and excellent selectivity towards NH3 at room temperature 2023 Chin. Phys. B 32 080703
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