Rational design of ZnO-SnO2 Janus nanofibers for highly sensitive triethylamine detection

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2024-10-19 DOI:10.1016/j.snb.2024.136805

Zheyan Hu, Sarula Li, Feng Li, Tianqi Wang, Hong Shao, Xiangting Dong

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Abstract

Herein, ZnO-SnO₂ Janus nanofibers (NFs) were synthesized by a parallel electrospinning method and its sensing performances were tested. Considering the compositions of the two metal oxide semiconductors in Janus structure, different ratios of ZnO and SnO₂ were designed and controlled. The optimum ratios of ZnO and SnO₂ was 1:2 by analyzing their sensing performances to triethylamine (TEA) gas. Gas sensors based on ZS-12 Janus NFs exhibited a high response to TEA (45.2) and an excellent sensing response/recovery reproducibility. In order to investigate the sensing mechanism of Janus structure, ZnO NFs and SnO₂ NFs were synthesized and used as controlled experiment. The results indicated that the heterostructures in Janus NFs is the key factor for the enhanced TEA sensing performances. The electrons flowed in the ZnO-SnO₂ Janus structure leading to the variation of ionic oxygen species and electron depletion layer. These phenomena improved the reaction of TEA gas molecules with ionic oxygen species so that the TEA sensing performances were enhanced. Based on the Janus structures, a satisfactory gas sensor for detecting TEA gas were developed. Significantly, this work investigated the sensing mechanism of Janus structures and provided an efficient strategy for the gas sensing materials.

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用于高灵敏度三乙胺检测的 ZnO-SnO2 Janus 纳米纤维的合理设计

本文采用平行电纺丝法合成了 ZnO-SnO2 Janus 纳米纤维（NFs），并测试了其传感性能。考虑到 Janus 结构中两种金属氧化物半导体的组成，设计并控制了不同比例的 ZnO 和 SnO2。通过分析 ZnO 和 SnO2 对三乙胺（TEA）气体的传感性能，得出最佳比例为 1:2。基于 ZS-12 Janus NFs 的气体传感器对三乙胺的响应很高（45.2），并且具有出色的传感响应/回收再现性。为了研究 Janus 结构的传感机理，合成了 ZnO NFs 和 SnO2 NFs 并将其用作对照实验。结果表明，Janus NFs 中的异质结构是增强三乙醇胺传感性能的关键因素。电子在 ZnO-SnO2 Janus 结构中流动，导致离子氧物种和电子耗尽层的变化。这些现象改善了三乙醇胺气体分子与离子氧物种的反应，从而提高了三乙醇胺的传感性能。基于 Janus 结构，开发出了令人满意的检测三乙醇胺气体的气体传感器。重要的是，这项工作研究了 Janus 结构的传感机理，为气体传感材料提供了一种有效的策略。

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来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.