Highly Sensitive and Selective Gas Sensors for Ethanol Based on Mn Doped ZnO Nanoflakes

IF 2.7 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Cluster Science Pub Date : 2024-07-15 DOI:10.1007/s10876-024-02662-5

Mangesh Awale, S. D. Lokhande, L. H. Kathwate, M. Vasundhara, V. D. Mote, A. B. Kadam

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Abstract

Low-operating temperature gas sensors play a pivotal role in environmental and health safety. Here, we investigate the performance of hexagonal ZnO nanostructures for detecting hazardous ethanol gas. Pure and 3% Mn doped ZnO thin films were synthesized by a spray pyrolysis method. The study focused on investigating structural, morphological, chemical composition, optical and gas sensing properties of these films. By adding 3% Mn doping, the structural, morphological and optical properties of ZnO film notably changed. The 3% Mn-doped ZnO thin film exhibits a high response of 360 compared to undoped ZnO (154) towards 50 ppm of ethanol at room temperature. This may be due to the increased surface reactivity and defects sites. The response/recovery time of the Mn-doped ZnO to ethanol is found to be 18/40s. Gas sensing studies suggest that the 3% Mn-doped ZnO thin film has good reproducibility, stability and selectivity. The sensing mechanism of ethanol by Mn-doped ZnO thin films is studied and discussed. These findings suggest that Mn-doped ZnO thin films are promising candidates for low temperature ethanol sensing application.

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基于掺锰氧化锌纳米片的高灵敏度和选择性乙醇气体传感器

低温气体传感器在环境和健康安全方面发挥着举足轻重的作用。在此，我们研究了六方氧化锌纳米结构在检测有害乙醇气体方面的性能。我们采用喷雾热解法合成了纯氧化锌薄膜和掺杂 3% 锰的氧化锌薄膜。研究重点是这些薄膜的结构、形态、化学成分、光学和气体传感特性。通过添加 3% 的锰掺杂，氧化锌薄膜的结构、形态和光学特性发生了显著变化。与未掺杂的氧化锌（154）相比，掺杂 3% 锰的氧化锌薄膜在室温下对 50 ppm 乙醇的响应高达 360。这可能是由于表面活性和缺陷点增加所致。掺锰氧化锌对乙醇的响应/恢复时间为 18/40 秒。气体传感研究表明，3% 的掺锰氧化锌薄膜具有良好的重现性、稳定性和选择性。研究并讨论了掺锰氧化锌薄膜对乙醇的传感机制。这些研究结果表明，掺锰氧化锌薄膜有望用于低温乙醇传感。

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来源期刊

Journal of Cluster Science 化学-无机化学与核化学

CiteScore

6.70

自引率

0.00%

发文量

166

审稿时长

3 months

期刊介绍： The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.