高灵敏度、高选择性和低检测限的金纳米颗粒敏化氧化锌纳米棒一氧化氮气体传感器

Nano Pub Date : 2024-02-01 DOI:10.1142/s1793292024500012
Dulal Chandra Patra, Anabadya Dash, Nitumoni Deka, S. P. Mondal
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引用次数: 0

摘要

开发一种具有高选择性、高灵敏度和低检测限的低成本手持式一氧化氮(NO)传感器对环境和健康监测应用具有吸引力。利用水热法生长的氧化锌纳米棒(ZnO NRs)制作了一氧化氮气体传感器。通过在 ZnO NRs 上附着金纳米粒子(Au NPs),传感器的响应、灵敏度和检测限等传感性能得到了显著提高。金纳米粒子是通过化学还原法从三水氯化金中合成的。金纳米粒子通过旋涂法附着在纳米棒上。在[式中:见正文]C 的工作温度和[式中:见正文]l 的金负载条件下,传感器获得了最大响应和灵敏度。传感器对丙酮、氨、一氧化碳、过氧化氢和丙醇进行了干扰研究。结果表明,该传感器对干扰气体和高湿度条件具有很高的选择性。金装饰 ZnO NRs 的检测限非常低 [式中:见正文][式中:见正文]ppb,这对生物医学应用很有吸引力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Gold Nanoparticle-Sensitized Zinc Oxide Nanorods-Based Nitric Oxide Gas Sensors with High Sensitivity, Selectivity and Low Detection Limit
Development of a low-cost hand-held nitric oxide (NO) sensor with high selectivity, sensitivity and low detection limit is attractive for environment and health monitoring applications. NO gas sensor was fabricated using hydrothermally grown ZnO nanorods (ZnO NRs). The sensing performance like sensor response, sensitivity, detection limit has been improved significantly by attaching gold nanoparticles (Au NPs) with ZnO NRs. Au NPs were synthesized by chemical reduction method from gold chloride trihydrate. The attachment of Au NPs on nanorods was done by spin coating method. The maximum sensor response and sensitivity were obtained at [Formula: see text]C operating temperature with [Formula: see text]l gold loading. The interference study of the sensor was carried out with acetone, ammonia, carbon monoxide, hydrogen peroxide and propanol. It demonstrated high selectivity towards the interfering gases and high humid condition. Au-decorated ZnO NRs exhibited very low detection limit [Formula: see text][Formula: see text]ppb, which is attractive for biomedical applications.
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