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SnO@BiO核壳异质结结构的制备及其气敏性能

Preparation and Gas-Sensitive Properties of SnO@BiO Core-Shell Heterojunction Structure.

作者信息

Liu Jin, Gao Yixin, Lv Yuanyuan, Yang Mengdi, Guo Haoru, Li Neng, Bai Danyang, Wang Anyi

机构信息

School of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

出版信息

Nanomaterials (Basel). 2025 Jan 16;15(2):129. doi: 10.3390/nano15020129.

DOI:10.3390/nano15020129
PMID:39852744
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11767349/
Abstract

The SnO@BiO core-shell heterojunction structure was designed and synthesized via a hydrothermal method, and the structure and morphology of the synthesized samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Based on the conclusions from XRD and SEM, it can be observed that as the hydrothermal temperature increases, the content of BiO coated on the surface of SnO spheres gradually increases, and the diameter of BiO nanoparticles also increases. At a hydrothermal temperature of 160 °C, the SnO spheres are fully coated with BiO nanoparticles. This paper investigated the gas-sensitive performance of the SnO@BiO sensor towards ethanol gas. Gas sensitivity tests at the optimal operating temperature of 300 °C showed that the composite prepared at 160 °C achieved a response value of 19.7 for 100 ppm ethanol. Additionally, the composite exhibited excellent response to 100 ppm ethanol, with a response time of only 4 s, as well as good repeatability. The excellent gas-sensitive performance of the SnO@BiO core-shell heterojunction towards ethanol gas is attributed to its p-n heterojunction material properties. Its successful preparation contributes to the realization of high-performance heterostructure ethanol gas sensors.

摘要

通过水热法设计并合成了SnO@BiO核壳异质结结构，使用X射线衍射（XRD）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对合成样品的结构和形貌进行了表征。根据XRD和SEM的结论，可以观察到随着水热温度的升高，包覆在SnO球表面的BiO含量逐渐增加，BiO纳米颗粒的直径也增大。在160℃水热温度下，SnO球被BiO纳米颗粒完全包覆。本文研究了SnO@BiO传感器对乙醇气体的气敏性能。在300℃最佳工作温度下的气敏测试表明，在160℃制备的复合材料对100 ppm乙醇的响应值为19.7。此外，该复合材料对100 ppm乙醇表现出优异的响应，响应时间仅为4 s，且具有良好的重复性。SnO@BiO核壳异质结对乙醇气体优异的气敏性能归因于其p-n异质结材料特性。其成功制备有助于实现高性能异质结构乙醇气体传感器。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/a1b15b8d55f8/nanomaterials-15-00129-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/2cebbdcc2f10/nanomaterials-15-00129-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/f28127e96ba1/nanomaterials-15-00129-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/05cb8c0c3541/nanomaterials-15-00129-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/d3512e257776/nanomaterials-15-00129-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/07dc94031ff1/nanomaterials-15-00129-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/acfaa3a4a5f0/nanomaterials-15-00129-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/edd237eb8ffd/nanomaterials-15-00129-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/6652b73bc132/nanomaterials-15-00129-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/a1b15b8d55f8/nanomaterials-15-00129-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/2cebbdcc2f10/nanomaterials-15-00129-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/f28127e96ba1/nanomaterials-15-00129-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/05cb8c0c3541/nanomaterials-15-00129-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/d3512e257776/nanomaterials-15-00129-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/07dc94031ff1/nanomaterials-15-00129-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/acfaa3a4a5f0/nanomaterials-15-00129-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/edd237eb8ffd/nanomaterials-15-00129-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/6652b73bc132/nanomaterials-15-00129-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b735/11767349/a1b15b8d55f8/nanomaterials-15-00129-g009.jpg

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