A high-performance room-temperature NH<sub>3</sub> gas sensor based on WO<sub>3</sub>/TiO<sub>2</sub> nanocrystals decorated with Pt NPs
Zhixuan Wu, Zhengai Chen, Zhixiang Deng, Ning Dai, Yan Sun, Meiying Ge
Abstract
sensor is tenfold higher, with the lowest concentration threshold reaching the 75 ppb level. The response is approximately 92.28 to 50 ppm, and response and recovery times are 23 s and 8 s, respectively. The improved sensing was attributed to a synergetic mechanism involving the space charge layer effect and Pt metal sensitization, enhancing the electron transfer efficiency, oxygen vacancy and specific surface area. This study is expected to guide the development of high-performance room-temperature ammonia sensors for clinical breath testing.
Topics & Concepts
NanocrystalHydrothermal circulationMaterials scienceAmmoniaHydrothermal synthesisNanotechnologyAmmonia gasChemical engineeringChemistryOrganic chemistryEngineeringGas Sensing Nanomaterials and SensorsAdvanced Chemical Sensor TechnologiesAnalytical Chemistry and Sensors