Enhanced Hydrogen Gas Sensing Performance of Gold Nanoparticle Decorated Nitrogen-Doped ZnO Nanomaterials for Improved Sensitivity and Rapid Response

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nanotechnology Pub Date : 2024-12-25 DOI:10.1109/TNANO.2024.3522368

Sanjana Devi VS;Balraj B;Amuthameena S;Joby Titus T

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Abstract

This study investigates the enhancement of hydrogen (H ₂ ) gas sensing in nitrogen-doped Zinc Oxide (ZnO) nanomaterials through the decoration of gold (Au) nanoparticles. ZnO nanoparticles were synthesized via a wet chemical method, doped with nitrogen at 0.5%, 1.0%, and 1.5% concentrations, and decorated with Au nanoparticles. Characterization using X-ray diffraction (XRD) revealed that the ZnO structure remained intact, with the addition of a peak corresponding to Au at 38.19°. Transmission electron microscopy (TEM) confirmed the uniform distribution of spherical Au nanoparticles on the ZnO surfaces. UV-Vis spectroscopy showed an enhanced absorption peak at 532 nm due to surface plasmon resonance. Photoluminescence (PL) spectra indicated reduced emission intensity, suggesting effective charge transfer between ZnO and Au. Gas sensing tests revealed that Au-decorated 1.0 wt. % N exhibited a maximum H ₂ gas response of 89% at 200 °C, significantly higher than the 46% response of non-decorated 1.0 wt. % N. Additionally, the Au-decorated N sensors demonstrated a rapid response time of 10 sec and a recovery time of 15 sec. These results highlight the potential of Au-decorated N-doped nanomaterials as highly efficient H ₂ gas sensors, combining enhanced sensitivity with fast response kinetics.

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金纳米粒子修饰氮掺杂ZnO纳米材料的氢气传感性能提高灵敏度和快速响应

本研究通过金纳米粒子的修饰，研究了氮掺杂氧化锌（ZnO）纳米材料中氢（H2）气敏的增强。采用湿法合成ZnO纳米粒子，分别以0.5%、1.0%和1.5%浓度的氮掺杂，并以Au纳米粒子装饰。x射线衍射（XRD）表征表明，ZnO结构保持完整，并在38.19°处添加了Au对应的峰。透射电镜（TEM）证实了球形金纳米颗粒在ZnO表面的均匀分布。紫外可见光谱显示，由于表面等离子体共振，532 nm处的吸收峰增强。光致发光（PL）光谱显示发射强度降低，表明ZnO和Au之间存在有效的电荷转移。气体传感测试表明，在200°C下，1.0 wt. % N的au修饰的H2气体响应率为89%，显著高于未修饰的1.0 wt. % N的46%的响应率。此外，au修饰的N传感器显示出10秒的快速响应时间和15秒的恢复时间。这些结果突出了au修饰的N掺杂纳米材料作为高效H2气体传感器的潜力，结合了增强的灵敏度和快速的响应动力学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Nanotechnology 工程技术-材料科学：综合

CiteScore

4.80

自引率

8.30%

发文量

审稿时长

8.3 months

期刊介绍： The IEEE Transactions on Nanotechnology is devoted to the publication of manuscripts of archival value in the general area of nanotechnology, which is rapidly emerging as one of the fastest growing and most promising new technological developments for the next generation and beyond.