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

Ye Zhu; Li Yang; Shenghui Guo; Ming Hou; Yanjia Ma

doi:10.3390/ma16020792

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

Materials (Basel). 2023 Jan 13;16(2):792. doi: 10.3390/ma16020792.

Authors

Ye Zhu^{1

2}, Li Yang^{1

2}, Shenghui Guo^{1

2}, Ming Hou^{1

2}, Yanjia Ma^{1

2}

Affiliations

¹ State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.
² Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Abstract

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 °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.

Keywords: Sn/SnO2; ethanol; flower-like; gas sensor; in situ synthesis.

Abstract

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