Highly selective ethanol detection on sheet-like ZnO sensor synthesized by microemulsion

IF 1.7 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Transition Metal Chemistry Pub Date : 2024-11-22 DOI:10.1007/s11243-024-00615-5

Fahimeh Hooriabad Saboor, Seyed Parsa Amouzesh, Abbas Ali Khodadadi, Yadollah Mortazavi

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Abstract

Sheet-like ZnO nanoparticles (SZNs) were synthesized using a microemulsion method and characterized by XRD, BET, DRS, and FESEM techniques. These nanoparticles were then utilized as selective ethanol sensors operating at temperatures between 300 and 450 °C. When precursor ZnO concentrations were high, the average particle size of the SZNs increased, which was reflected in the sharper diffraction peaks observed in the XRD results. The low band gap of SZNs, attributed to their 2D morphology, was confirmed by the Tauc diagram. The SZN sensors demonstrated a remarkable selectivity for ethanol, with response levels up to 77 times higher than for CO and 3700 times higher than for CH₄, achieving a limit of detection between 2.7 and 13.3 ppm. By fine-tuning the microemulsion conditions, the SZN4 sensor achieved an exceptionally high response to ethanol, about 106 times, and up to 30 times higher compared to TCE, toluene, and propane. Furthermore, the SZN4 and SZN5 sensors exhibited a relative insensitivity to humidity, with only a 26% and 17% reduction in ethanol response, respectively.

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微乳液合成片状ZnO传感器的高选择性乙醇检测

采用微乳液法制备了片状ZnO纳米粒子（SZNs），并用XRD、BET、DRS和FESEM等技术对其进行了表征。这些纳米颗粒随后被用作选择性乙醇传感器，工作温度在300至450°C之间。当前驱体ZnO浓度较高时，SZNs的平均粒径增大，这反映在XRD结果中观察到的更尖锐的衍射峰上。tac图证实了SZNs的低带隙是由于其二维形态所致。SZN传感器对乙醇具有显著的选择性，响应水平比CO高77倍，比CH4高3700倍，检测限在2.7 ~ 13.3 ppm之间。通过微调微乳液条件，SZN4传感器实现了对乙醇的高响应，比TCE、甲苯和丙烷高106倍，最高可达30倍。此外，SZN4和SZN5传感器对湿度表现出相对不敏感，对乙醇的响应分别仅降低26%和17%。图形抽象

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.