Combinatorial Material Strategy: Parallel Synthesis and High-Throughput Screening of WO<sub>3</sub> Nanoplates Decorated with Noble Metals for VOCs Sensor
Yanjia Ma,
Ming Hou,
Li Yang,
Jiyun Gao,
Guozhu Zhang,
Ronghui Guo,
Shenghui Guo
Affiliations
Yanjia Ma
Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Ming Hou
Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Li Yang
Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Jiyun Gao
Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Guozhu Zhang
Shanghai Key Laboratory of Intelligent Sensing and Detection Technology, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
Ronghui Guo
College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
Shenghui Guo
Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
In this study, we report on the rapid preparation of WO3 nanoplates decorated with noble metals and evaluate their gas-sensing performance using a high-throughput screening technique. The incorporation of Pd significantly enhanced the gas-sensing properties, and, among all of the samples tested, the WO3 nanoplate containing 0.3 mol% Pd exhibited the highest response to 100 ppm xylene at 250 °C (Ra/Rg = 131.2), which was almost 56 times greater than that of the pure WO3 sample. Additionally, this sample demonstrated rapid response and recovery times (τresponse = 3.9 s and τrecovery = 189.2 s, respectively). The nanoplate samples were also classified and screened using cluster analysis, and the selected samples were optimized for use in a sensor array. By applying principal component analysis and Fisher discriminant analysis, four typical gases were identified and a potential sensitization mechanism was elucidated.
