Author(s)

Abeer Alhadi¹, Shuyi Ma^1*, Shitu Pei¹, Tingting Yang¹, Pengdou Yun¹, Qianqian Zhang¹, Hamouda Adam Hamouda^2,3, Li Wang¹, Omer Almamoun⁴, Altayeb Alshiply⁵, Pengfei Cao¹, Manahil H. Balal^6,7, Khalid Ahmed Abbakar^7,8

¹Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, China.
²College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China.
³Department of Chemistry, Faculty of Science, University of Kordofan, El Obeid, Sudan.
⁴Faculty of Petroleum and Hydrology Engineering, West Kordofan, Peace University, Almugled, Sudan.
⁵Department of Physics, Faculty of Education, University of Khartoum, Khartoum, Sudan.
⁶Physics Department, Faculty of Science and Art, Al Baha University, Gilwah, KSA.
⁷Department of Mathematics and Physics, Faculty of Education, University of Gadarif, Gadarif, Sudan.
⁸College of Mathematics and Statistics, Northwest Normal University, Lanzhou, China.

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.

SnO₂ Flower-Shaped, Hydrothermal Method, Formaldehyde, Semiconductor, Gas Sensor

Alhadi, A. , Ma, S. , Pei, S. , Yang, T. , Yun, P. , Zhang, Q. , Hamouda, H. , Wang, L. , Almamoun, O. , Alshiply, A. , Cao, P. , Balal, M. and Abbakar, K. (2021) Synthesis and Characterization of SnO₂ Flower-Shaped by Hydrothermal Route for Formaldehyde Sensing Properties. Advances in Materials Physics and Chemistry, 11, 67-77. doi: 10.4236/ampc.2021.114007.