Construction of Flower-like PtOx@ZnO/In2O3 Hollow Microspheres for Ultrasensitive and Rapid Trace Detection of Isopropanol

• DOI: 10.1021/acsami.2c20746
• Publication Date: 2023-02-22T14:56:57Z
• Authors: Yongjiao Sun; Baoxia Wang; Bingliang Wang; Zhenting Zhao; Wenlei Zhang; Wendong Zhang; Koichi Suematsu; Jie Hu
• Keywords: Response time

The design of a highly effective isopropanol gas sensor with high response and trace detection capability is extremely important for environmental surveillance human health. Here, novel flower-like PtOx@ZnO/In2O3 hollow microspheres were prepared by three-step approach. structure was composed an In2O3 shell inside layered ZnO/In2O3 nanosheets outside PtOx nanoparticles (NPs) on the surface. Meanwhile, sensing performances composite different Zn/In ratios composites evaluated compared systematically. measurement results indicated that ratio affected performance ZnIn2 presented higher response, which then modified NPs to further enhance its property. Pt@ZnIn2 exhibited outstanding ultrahigh values under 22 95% relative humidity (RH). In addition, it also showed rapid response/recovery speed, good linearity, low theoretical limit (LOD) regardless being relatively dry or ultrahumid atmosphere. enhancement properties might be ascribed unique PtOx@ZnO/In2O3, heterojunctions between components, catalytic effect Pt NPs.