Bimetallic organic framework-derived SnO2/Co3O4 heterojunctions for highly sensitive acetone sensors,New Journal of Chemistry

当前位置： X-MOL 学术 › New J. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Bimetallic organic framework-derived SnO2/Co3O4 heterojunctions for highly sensitive acetone sensors
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2021-08-25 , DOI: 10.1039/d1nj03025f
Lixia Sun _{1,

2} , Xueling Yuan ₂ , Jianhua Sun ₂ , Kewei Zhang ₃ , Dankui Liao ₂ , Shan Chen ₁

Affiliation

Porous structures and heterogeneous compositions are highly desirable to achieve improved sensing performance. Herein, a SnO₂/Co₃O₄ composite with catalytic sites and abundant oxygen vacancies has been successfully synthesized by pyrolyzation of Sn- and Co-based bimetallic organic frameworks (bMOFs). The composites demonstrate desirable p–n heterojunctions, which was confirmed by diffuse reflection ultraviolet–visible spectroscopy (DRS) and Mott–Schottky (M–S) plots. Gas-sensing experiments reveal that the response of SnO₂/Co₃O₄ composites (Sn/Co = 2 : 1, atomic ratio) reaches 498 to 50 ppm acetone, which is about 5 times higher than that of the pure SnO₂. Moreover, the composites exhibit better selectivity and stability at an operating temperature of 275 °C. This excellent performance is attributed to the synergistic effect of catalysis of Co³⁺ and the formation of p–n heterojunctions at the interface between Co₃O₄ and SnO₂.

中文翻译：

用于高灵敏度丙酮传感器的双金属有机骨架衍生的 SnO2/Co3O4 异质结

非常需要多孔结构和异质组合物来实现改进的传感性能。在此，通过热解 Sn 和 Co 基双金属有机骨架 (bMOF)，成功合成了具有催化位点和丰富氧空位的 SnO ₂ /Co ₃ O ₄复合材料。复合材料表现出理想的 p-n 异质结，这通过漫反射紫外-可见光谱（DRS）和莫特-肖特基（M-S）图得到证实。气敏实验表明，SnO ₂ /Co ₃ O ₄复合材料（Sn/Co = 2 : 1，原子比）对丙酮的响应达到498-50 ppm，比纯SnO ₂的响应高约5倍. 此外，该复合材料在 275 °C 的工作温度下表现出更好的选择性和稳定性。这种优异的性能归因于 Co ³⁺的催化作用以及在 Co ₃ O ₄和 SnO ₂之间的界面处形成 p-n 异质结的协同作用。

更新日期：2021-09-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11