Hierarchical Pt-decorated In2O3 microspheres with highly enhanced isoprene sensing properties. Issue 7 (1st April 2021)

• Record Type: Journal Article
• Authors: Han, Baoqing; Wang, Hairong; Yang, Wanying; Wang, Jiuhong; Wei, Xueyong
• Is Part Of: Ceramics international. Volume 47:Issue 7(2021)Part A
• Page Start: 9477
• Page End: 9485
• Publication Date: 2021-04-01
• Subjects: Hierarchical structures -- Advanced fibrosis -- Pt-decorated In2O3 -- Gas sensors -- Isoprene sensing; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.12.081
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: For advanced fibrosis, isoprene is a typical characteristic marker that could be used to quickly screen the population for chronic liver disease (CLD). To achieve trace detection of isoprene, different mol% Pt-decorated In2 O3 and pure In2 O3 samples were prepared with the commonly used hydrothermal method. The obtained characterization results show that the prepared Pt-decorated In2 O3 (1 mol%) sample had Pt nanoparticles uniformly attached to the surface of porous hierarchical In2 O3 nanosheets, and the specific surface area was 62.3 m 2 /g. Subsequently, these sensors based on Pt–In2 O3 and pure In2 O3 nanomaterials were prepared, and their response characteristics were studied. The results show that the response of 1 mol% Pt–In2 O3 to isoprene gas was significantly enhanced, and the optimal working temperature was 200 °C. The response of 1 mol% Pt–In2 O3 to 5 ppb and 5 ppm isoprene was approximately 3.2 times and 25.9 times that of pure In2 O3, respectively. Meanwhile, the 1 mol% Pt-modified sample exhibited excellent selectivity for isoprene relative to other biomarkers (carbon monoxide, hydrogen, ethanol, and ammonia). The sensor shows good repeatability and long-term stability. Therefore, the developed 1 mol% Pt-decorated In2 O3 was expected to be applied as a gas-sensitive material for breath isoprene, which could be suitable for large-scale CLD rapid breath detection.