基于In掺杂和In2O3相的多孔pd修饰SnO2纳米纤维的高灵敏度乙酸乙酯传感器

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2025-10-15 DOI:10.1016/j.snb.2025.138993

Xiaoya Xie, Long Chen, Zihao Liu, Yanhua Song, Bangjie Zhou, Yangfan Shen, Fang Zhou, Yanxin Wang, Yi Li, Xing Chen

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引用次数: 0

摘要

在这项研究中，我们通过简单的静电纺丝和退火工艺，成功地合成了含有Pd和In的中空结构的SnO2纳米纤维。这些纳米纤维对乙酸乙酯表现出增强的气敏性能。采用XRD、SEM、TEM、XPS和BET对材料的结构和形貌进行了表征。优化后的3% Pd-In2O3-SnO2传感器对50 ppm乙酸乙酯的响应值高达163.8，是纯SnO2的5.5倍。在190℃的工作温度下，具有良好的选择性，低检出限为100 ppb，并保持良好的长期稳定性和重复性。此外，在DFT模拟的支持下，提出了一个综合机制来解释传感器的优异性能，这归因于Pd和In的添加，异质结的形成和分层多孔纳米结构的影响。这些因素共同增强了气体吸附和电子转移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Highly sensitive ethyl acetate sensor based on porous Pd-decorated SnO2 nanofibers with In doping and In2O3 phases

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Highly sensitive ethyl acetate sensor based on porous Pd-decorated SnO2 nanofibers with In doping and In2O3 phases

In this study, we successfully synthesized SnO₂ nanofibers with a hollow structure incorporating Pd and In, via a straightforward electrospinning and annealing process. These nanofibers exhibit enhanced gas sensing properties towards ethyl acetate. The structure and morphology of the materials were characterized by XRD, SEM, TEM, XPS and BET. The optimized 3% Pd-In₂O₃-SnO₂ sensor demonstrates a high response value of 163.8 for 50 ppm ethyl acetate, which is 5.5 times higher than the response of pure SnO₂. It also shows excellent selectivity, a low detection limit of 100 ppb, and maintains good long-term stability and reproducibility at an operating temperature of 190°C. In addition, an integrated mechanism is proposed to explain the excellent performance of the sensor, supported by DFT simulations, which is attributed to the effects of the addition of Pd and In, heterojunction formation, and hierarchical porous nanostructures. These factors collectively enhance gas adsorption and electron transfer.

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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.