In Situ Synthesis of Hierarchical Flower-like Sn/SnO2 Heterogeneous Structure for Ethanol GAS Detection

被引：8
作者：
Zhu, Ye [1 ,2 ]
Yang, Li [1 ,2 ]
Guo, Shenghui [1 ,2 ]
Hou, Ming [1 ,2 ]
Ma, Yanjia [1 ,2 ]
机构：
[1] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cle, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China
来源：
MATERIALS | 2023年 / 16卷 / 02期
关键词：
in situ synthesis; flower-like; Sn; SnO2; gas sensor; ethanol; NANOSTRUCTURES; MICROSPHERES; ENHANCEMENT; TEMPERATURE; AMMONIA;
D O I：
10.3390/ma16020792
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, morphogenetic-based Sn/SnO2 graded-structure composites were created by synthesizing two-dimensional SnO sheets using a hydrothermal technique, self-assembling into flower-like structures with an average petal width of roughly 3 um. The morphology and structure of the as-synthesized samples were characterized by utilizing SEM, XRD, XPS, etc. The gas-sensing characteristics of gas sensors based on the flower-like Sn/SnO2 were thoroughly researched. The sensor displayed exceptional selectivity, a rapid response time of 4 s, and an ultrahigh response at 250 degrees C (Ra/Rg = 17.46). The excellent and enhanced ethanol-gas-sensing properties were mainly owing to the three-dimensional structure and the rise in the Schottky barrier caused by the in situ production of tin particles.
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页数：12
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