Loading uniform Ag_(3)PO_(4)nanoparticles on three-dimensional peony-like WO_(3)for good stability and excellent selectivity towards NH_(3)at room temperature  

作　　者：邵星炎 贾福超 刘婷婷 刘健诚 王小梅 尹广超 吕娜 周通 Ramachandran Rajan 刘波 Xingyan Shao;Fuchao Jia;Tingting Liu;Jiancheng Liu;Xiaomei Wang;Guangchao Yin;Na Lv;Tong Zhou;Ramachandran Rajan;Bo Liu(Laboratory of Functional Molecules and Materials,School of Physics and Optoelectronic Engineering,Shandong University of Technology,Zibo 255000,China;School of Material Science and Engineering,Shandong University of Technology,Zibo 255000,China;Provincial Key Laboratory of Network Based Intelligent Computing,University of Jinan,Jinan 250022,China;Translational Medical Center,Zibo Central Hospital,Zibo 255036,China)

机构地区：[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

出　　处：《Chinese Physics B》2023年第8期251-259,共9页中国物理B（英文版）

基　　金：financial support from the Collaborative Education Project of IndustryUniversity Cooperation of the Ministry of Education of China(Grant No.202101256024);the National Natural Science Foundation of China(Grant Nos.11904209 and 61802144)。

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 Ag_(3)PO_(4)nanocomposites at room temperature(25℃).A nanocomposite of Ag_(3)PO_(4)nanoparticles and three-dimensional peony-like WO_(3)(WO_(3)/Ag_(3)PO_(4))was successfully prepared by the precipitation method.The crystalline phases were analyzed by xray 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 WO_(3)/Ag_(3)PO_(4)sensors was systematically explored at room temperature.The composite sensors possessed a higher response and lower detection limit(1 ppm)to NH_(3)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(Ag_(3)PO_(4):WO3mass ratio of 5:5)displayed the highest response to NH_(3)at room temperature.Interestingly,the A5W5 gas sensor exhibited relatively good stability and excellent selectivity to NH_(3).The A5W5 sensor also displayed a relatively good response under high humidity.The gas-sensing mechanism of the WO_(3)/Ag_(3)PO_(4)sensors is explained in detail.Taken together,the as-prepared sensor is highly efficient at detecting NH_(3)and could be suitable for practical applications.In addition,this study also provides a new method for developing Ag_(3)PO_(4)-based sensors in the gas-sensing field.

关 键 词：Ag_(3)PO_(4) peony-like WO_(3) NH_(3) room temperature 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB332[自动化与计算机技术—控制科学与工程]