First-Principles Guided Design of Pd-Decorated V<sub>2</sub>O<sub>5</sub>/Porous Silicon Composites for High-Performance NO<sub>2</sub> Sensing at Room Temperature

First-Principles Guided Design of Pd-Decorated V<sub>2</sub>O<sub>5</sub>/Porous Silicon Composites for High-Performance NO<sub>2</sub> Sensing at Room Temperature

A Pd-decorated V<sub>2</sub>O<sub>5</sub>/porous silicon (Pd-V<sub>2</sub>O<sub>5</sub>/PSi) composite was synthesized via magnetron sputtering for enhanced NO<sub>2</sub> gas sensing. The material’s morphology and composition were systemat...

Full description

Saved in:
Bibliographic Details
Main Authors: Xiaoyong Qiang, Yongliang Guo, Zhipeng Wang, Tao Chen, Rui Zhang, Weibin Zhou
Format: Article
Language:English
Published: MDPI AG 2025-03-01
Series:Nanomaterials
Subjects:
NO<sub>2</sub> gas sensor
Pd decoration
V<sub>2</sub>O<sub>5</sub>/PSi composite
first-principles calculations
room-temperature sensing
Online Access:https://www.mdpi.com/2079-4991/15/7/513
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A Pd-decorated V<sub>2</sub>O<sub>5</sub>/porous silicon (Pd-V<sub>2</sub>O<sub>5</sub>/PSi) composite was synthesized via magnetron sputtering for enhanced NO<sub>2</sub> gas sensing. The material’s morphology and composition were systematically characterized, and its gas sensing performance was evaluated through comprehensive experimental measurements and first-principles calculations. The decoration of Pd nanoparticles significantly improved the sensing capabilities of the V<sub>2</sub>O<sub>5</sub>/PSi composite, particularly enhancing sensitivity and response/recovery characteristics. Experimental results revealed a 3.1-fold increase in response to specific NO<sub>2</sub> concentrations (ppm level) compared to the undecorated V<sub>2</sub>O<sub>5</sub>/PSi sensor. The composite exhibited rapid NO<sub>2</sub> response at room temperature with excellent selectivity, reproducibility, and long-term stability. First-principles calculations elucidated the structural, electronic, and adsorption properties of the Pd-V<sub>2</sub>O<sub>5</sub>/PSi composite, uncovering the gas sensing mechanism in NO<sub>2</sub> environments. This combined experimental and theoretical study provides valuable insights for developing advanced gas sensors and lays a foundation for optimizing metal oxide-based sensing materials.
ISSN:2079-4991

Similar Items