Enhanced n-butanol sensing performance of SnO2/ZnO nanoflowers fabricated via a facile solvothermal method. Issue 15 (1st August 2022)

• Record Type: Journal Article
• Authors: Li, Yan; Shan, Lin-Xi; Wang, Ren-Cong; Lian, Xiao-Xue; Zhou, Qing-Jun
• Is Part Of: Ceramics international. Volume 48:Issue 15(2022)
• Page Start: 22467
• Page End: 22475
• Publication Date: 2022-08-01
• Subjects: Zinc oxide -- Tin oxide -- Nanoflowers -- n-butanol sensor -- Gas sensing; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.04.256
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: High-performance gas sensors have important application prospects in the detection and monitoring of toxic and harmful gases that exist in the environment and workshop. Herein, SnO2 /ZnO nanoflowers with core-shell like structure were successfully fabricated by a two-step solvothermal method. Morphology and mineral phase characterizations demonstrate that the nanoflowers, composed of a SnO2 flower core in a diameter of about 50 nm and ZnO nanoparticles embedded in the interstice of SnO2 petals, has a novel mesoporous hierarchical structure with pore size distributed in about 3 nm and 30 nm and a specific surface area of 36.474 m 2 /g, benefitting to gas-sensing. The results reveal that, compared to pure SnO2 nanoflowers, the optimal SnO2 /ZnO (Zn/Sn is 5%) based gas sensor shows 2.7-fold sensing enhancement, fast response (3 s), long-term stability toward n-butanol. It has an outstanding selectivity to n-butanol rather than other gas, its response toward 100 ppm n-butanol at 200 °C is up to 13, 34, 15 and 32 times of that to acetone, xylene, ammonia and carbon monoxide respectively. Hence, SnO2 /ZnO nanoflowers can be considered as a practical sensing material for n-butanol detection.