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

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.

Automated summary

In this study, a morphogenetic-based Sn/SnO2 graded-structure composites were synthesized, consisting of two-dimensional SnO sheets self-assembled into flower-like structures. The as-synthesized samples were characterized using SEM, XRD, XPS, and other techniques. The gas-sensing properties of the flower-like Sn/SnO2 gas sensor were thoroughly investigated, showing exceptional selectivity, a rapid response time of 4 s, and an ultrahigh response at 250 degrees C (Ra/Rg = 17.46). The enhanced ethanol-gas-sensing properties were attributed to the three-dimensional structure and the rise in the Schottky barrier caused by in situ production of tin particles.