Nanostructured WO<sub>3</sub> based gas sensors: a short review
Srinivas Rao Sriram, Saidi Reddy Parne, Venkata Satya Chidambara Swamy Vaddadi, Damodar Reddy Edla, P. Nagaraju, Raji Reddy Avala, Y. Vijayakumar, Uday Bhasker Sontu
Abstract
Purpose This paper aims to focus on the basic principle of WO 3 gas sensors to achieve high gas-sensing performance with good stability and repeatability. Metal oxide-based gas sensors are widely used for monitoring toxic gas leakages in the environment, industries and households. For better livelihood and a healthy environment, it is extremely helpful to have sensors with higher accuracy and improved sensing features. Design/methodology/approach In the present review, the authors focus on recent synthesis methods of WO 3 -based gas sensors to enhance sensing features towards toxic gases. Findings This work has proved that the synthesis method led to provide different morphologies of nanostructured WO 3 -based material in turn to improve gas sensing performance along with its sensing mechanism. Originality/value In this work, the authors reviewed challenges and possibilities associated with the nanostructured WO 3 -based gas sensors to trace toxic gases such as ammonia, H 2 S and NO 2 for future research.