Work

UV-Activated NO2 Gas Sensing: Photoactivated Processes on the Surface of Metal Oxides

Year: 2025

Type: article

Abstract: In recent years, wide bandgap metal oxide semiconductors have become the base materials of choice for semiconductor gas sensor design. In this work, nanocrystalline ZnO, In2O3, and SnO2 were investigated when detecting NO2 under UV-photoactivation conditions. The materials were characterized by XRD, low-temperature nitrogen adsorption, and electron microscopy. The article considers the mechanism of sensor signal formation, as well as the mechanism of action of UV-light photoactivation, using an in situ multi-method approach. In situ mass spectrometry and in situ TR-DRIFTS were employed to study the impact of UV-light photoactivation on target gas adsorption equilibrium as well as the electrical and gas-sensing properties of the materials.

Source: Nanomaterials

DOI: 10.3390/nano15231795

Authors: Pavel Kutukov, Daria Kurtina, Sergey Maksimov, Marina Rumyantseva

Institutions: Lomonosov Moscow State University, Russian Academy of Sciences, Kazan Scientific Center

Language: English

Topic: Gas Sensing Nanomaterials and Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: Ministry of Science and Higher Education of the Russian Federation, Lomonosov Moscow State University