中国物理B ›› 2023, Vol. 32 ›› Issue (8): 80703-080703.doi: 10.1088/1674-1056/ac98a0

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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. 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
  • 收稿日期:2022-05-20 修回日期:2022-10-05 接受日期:2022-10-10 发布日期:2023-07-27
  • 通讯作者: Fuchao Jia, Bo Liu E-mail:jiafuchao@sdut.edu.cn;liub@sdut.edu.cn
  • 基金资助:
    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).

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. 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
  • Received:2022-05-20 Revised:2022-10-05 Accepted:2022-10-10 Published:2023-07-27
  • Contact: Fuchao Jia, Bo Liu E-mail:jiafuchao@sdut.edu.cn;liub@sdut.edu.cn
  • Supported by:
    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).

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摘要： 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.

关键词: Ag3PO4, peony-like WO3, NH3, room temperature

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.

Key words: Ag3PO4, peony-like WO3, NH3, room temperature

中图分类号:  (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

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