Xanthate sensing properties of Pt-functionalized WO3 microspheres synthesized by one-pot hydrothermal method. Issue 5 (1st April 2018)

• Record Type: Journal Article
• Authors: Li, Tingting; Shen, Yanbai; Zhao, Sikai; Chen, Xiangxiang; Li, Guodong; Lu, Rui; Zhu, Lijia; Li, Hansen; Wei, Dezhou; Shen, Yansong
• Is Part Of: Ceramics international. Volume 44:Issue 5(2018)
• Page Start: 4814
• Page End: 4823
• Publication Date: 2018-04-01
• Subjects: WO3 microspheres -- Pt addition -- Xanthate -- Gas sensor -- Sensing property; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.12.069
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: WO3 microspheres in a hierarchical nanorod-assembled architecture were prepared by using a facile one-pot hydrothermal method. The morphology and structure of pure, and 1, 3, and 5 mol% Pt-functionalized WO3 microspheres were characterized by means of SEM, TEM, XRD, XPS and FTIR measurements. Structural characterizations demonstrated that these WO3 microspheres assembled by numerous one-dimensional WO3 nanorods were approximately 2–5 µm in diameter. The nanorods with their diameters in the range of 70–90 nm showed a single crystal hexagonal structure. Gas sensors based on pure and Pt-functionalized WO3 microspheres showed reversible response and outstanding selectivity to xanthate gas at the operating temperature range of 75–175 °C. The sensor response increased with the increase of xanthate gas concentration. The highest response of 102.7 was obtained for the sensor based on 3 mol% Pt-functionalized WO3 microspheres to 100 ppm xanthate gas at an operating temperature of 100 °C, which could be ascribed to the large effective surface area and high porosity of WO3 microspheres as well as the catalytic effect of Pt nanoparticles.