Preparation and TEA gas sensing properties of Pt-modified honeycomb-like porous SnO2 nanosheets. (January 2023)

• Record Type: Journal Article
• Authors: Sun, Zeyu; Zhang, Jingyi; Zhang, Bowen; An, Xiangli; Zhang, Saisai; Wang, Chongyang; Bala, Hari; Zhang, Zhanying
• Is Part Of: Materials research bulletin. Volume 157(2023)
• Publication Date: 2023-01
• Subjects: Honeycomb-like porous structure -- Pt modifying -- SnO2 nanosheets -- Triethylamine -- Gas sensor; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2022.112014
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Honeycomb-like porous Pt/SnO2 nanosheets were prepared via a facile two-step method. The Pt/SnO2 exhibited better sensing properties to TEA compared with pristine SnO2 . The response value of 1%-Pt/SnO2 based sensor was 3700 to 100 ppm TEA at 200 °C. The enhanced TEA sensitivity mechanism of Pt/SnO2 was discussed detailed. Abstract: In this paper, honeycomb-like porous Pt-modified SnO2 nanocomposites were synthesized via a two-step method. The three-dimensional (3D) hierarchical porous structure was assembled from numerous SnO2 nanosheets with an average thickness of 16 nm. The gas sensing performance of the sensors based on pristine SnO2 and Pt/SnO2 nanocomposites was systematically investigated. The results indicated that decorating of Pt nanoparticles could significantly improve the sensitivity of SnO2 sensors to triethylamine (TEA), but could also reduce the optimal working temperature from 250 °C to 200 °C. In particular, the Pt/SnO2 based sensor with a Pt content of 1 at% exhibited the maximum response value, shortest response time, and excellent stability, implying its great application prospect for TEA detection. The significant improvement of TEA sensing performance of Pt-modified SnO2 sensors were attributed to the unique hierarchical porous structure and sensitizing actions of Pt nanoparticles. Graphical abstract: Image, graphical abstract