Synthesis and Characterization of SnO<SUB>2</SUB>Flower-Shaped by Hydrothermal Route for Formaldehyde Sensing Properties

作     者：Abeer Alhadi Shuyi Ma Shitu Pei Tingting Yang Pengdou Yun Qianqian Zhang Hamouda Adam Hamouda Li Wang Omer Almamoun Altayeb Alshiply Pengfei Cao Manahil H. Balal Khalid Ahmed Abbakar Abeer Alhadi;Shuyi Ma;Shitu Pei;Tingting Yang;Pengdou Yun;Qianqian Zhang;Hamouda Adam Hamouda;Li Wang;Omer Almamoun;Altayeb Alshiply;Pengfei Cao;Manahil H. Balal;Khalid Ahmed Abbakar

作者机构：Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province College of Physics and Electronic Engineering Northwest Normal University Lanzhou China College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou China Department of Chemistry Faculty of Science University of Kordofan El Obeid Sudan Faculty of Petroleum and Hydrology Engineering West Kordofan Peace University Almugled Sudan Department of Physics Faculty of Education University of Khartoum Khartoum Sudan Physics Department Faculty of Science and Art Al Baha University Gilwah KSA Department of Mathematics and Physics Faculty of Education University of Gadarif Gadarif Sudan College of Mathematics and Statistics Northwest Normal University Lanzhou China 

出 版 物：《Advances in Materials Physics and Chemistry》 (材料物理与化学进展（英文）)

年 卷 期：2021年第11卷第4期

页      面：67-77页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：SnO₂ Flower-Shaped Hydrothermal Method Formaldehyde Semiconductor Gas Sensor 

摘      要：In this work, we’ve made SnO2 flower formed with the aid of using easy test steps, and without cost, which is the hydrothermal approach and without a template. We have used a variety of techniques to characterize SnO2 flower-shaped by (SEM, TEM, XRD, BET and XPS) instruments. Confirmatory tests carried out have proven that the surface of the tetragonal structure of SnO2 has a rough surface which makes it excellent for its gas-sensing properties. The gas detection test of SnO2 flower-shaped proved that it possesses the selectivity of formaldehyde gas (about 30), the optimum operating temperature of the sensor is 220°C, and also the sensor has a high response time and recovery time is (5 s and 22 s) to 100 ppm, respectively. Particularly, the sensor has an obvious response value (2) when exposed to 5 ppm formaldehyde. As well, the mechanism of gas-sensing was also discussed.