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A TMO-ZnO Heterojunction-Based Sensor for Transformer Defect Detection: A DFT Study.

Jingyi Yan¹, Weiju Dai¹, Dexu Zou¹

¹Electric Power Research Institute of Yunnan Power Grid, Kunming 650214, China.

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|June 11, 2025

Summary

This summary is machine-generated.

Transition metal oxide-ZnO heterojunction sensors show enhanced gas sensing for H₂, CO, and C₂H₄. These sensors improve selectivity and resist poisoning, aiding transformer defect detection.

Keywords:

density functional theory dissolved gases energy efficiency analysis metal oxide heterojunction transformer defect detection

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Area of Science:

Materials Science
Chemical Engineering
Sensor Technology

Background:

Transition metal oxide (TMO)-ZnO heterojunctions are explored for gas sensing applications.
Improving sensor selectivity and resistance to poisoning is crucial for practical gas detection.

Purpose of the Study:

To analyze the gas adsorption and sensing properties of TMO-ZnO heterojunction sensors for hydrogen (H₂), carbon monoxide (CO), and ethylene (C₂H₄).
To investigate the impact of different TMOs (CuO, Ag₂O, Cu₂O) on sensor performance and stability.

Main Methods:

Computational analysis of gas adsorption on TMO-ZnO heterojunctions.
Evaluation of gas sensing performance and selectivity for target gases.
Assessment of sensor poisoning resistance through adsorption process simulation.

Main Results:

CuO, Ag₂O, and Cu₂O form stable heterojunctions with ZnO, enhancing sensor performance.
CuO-ZnO exhibits physical adsorption for H₂ and good sensing for CO and C₂H₄.
Ag₂O-ZnO and Cu₂O-ZnO show significant responses to H₂, CO, and C₂H₄.
TMO-ZnO heterojunctions effectively prevent sensor poisoning due to structural stability during gas adsorption.

Conclusions:

TMO-ZnO heterojunctions offer improved gas sensing capabilities and selectivity for H₂, CO, and C₂H₄.
The structural integrity of heterojunctions ensures resistance to sensor poisoning.
This research provides a theoretical basis for developing TMO-ZnO sensors for transformer defect monitoring and energy efficiency analysis.