One-Dimensional Metal Oxide Nanostructures: H<sub>2</sub> Gas Sensors

Abstract

This article thoroughly analyses metal oxide nanostructures with one-dimensional properties and their utilisation in hydrogen (H2) gas detection. In recent years, there has been an increasing interest in utilising the distinct characteristics of Metal Oxides (MOXs) Nanowires (NWs), Nanorods (NRs), and Nanotubes (NTs) to create advanced H2 gas sensors with exceptional performance. The article examines the ways of synthesising these nanostructures, focusing on hydrothermal, solvothermal, and electrospinning processes due to their cost-effectiveness and ability to produce high yields. This article discusses the operation of hydrogen (H2) gas sensors that utilize one-dimensional metal oxide frameworks that can perform effectively at both room temperature and low temperatures. Moreover, the research highlights the need to examine adjustable growth factors to enhance the efficiency of these nanostructures. Furthermore, this study comprehensively investigates the effects of decoration, functionalization, and doping techniques on boosting the chemical and physical characteristics of Metal Oxides (MOXs) that are useful in gas sensing functionality. The study proposes the necessity for future research to investigate the operational processes of metal oxide nanostructures, specifically in the setting of hybrid nanocomposites. Thorough investigations like this are essential for evaluating the effects of certain materials on the structure and form of the hybrid system. This review aims to offer substantial insights that will enhance the advancement of high-performance sensor devices tailored for the detection of hydrogen gas. Additionally, the review incorporates a perspective that illuminates the expected future research trends in the field.