层次化纳米片组装的SnO2/SnS2空心微球在低温下增强NO2传感性能

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-14 DOI:10.1016/j.apsusc.2025.163531

Bowen Zhang , Chongyang Wang , Zhiyan Feng , Bo Zhang , Saisai Zhang , Na Luo , Hari Bala , Yan Wang

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引用次数: 0

摘要

二氧化氮（NO2）的准确监测对环境保护和人类健康至关重要。在本研究中，通过水热法制备了由纳米片组装而成的分层SnS2空心微球，然后在300 ~ 400 ℃的煅烧温度下对SnS2进行原位氧化，形成SnO2/SnS2纳米复合材料。独特的空心形貌与SnO2-SnS2异质结的协同效应显著提高了NO2传感性能。气敏测试表明，在320 °C下煅烧的SnO2/SnS2-320传感器在100 °C的最佳工作温度下，对5 ppm NO2的响应值为50，比原始SnS2高约5倍。此外，SnO2/SnS2-320传感器表现出优异的重复性、长期稳定性和对NO2的选择性。密度泛函理论（DFT）计算进一步证实，SnO2/SnS2异质结构的NO2吸附能（- 0.040 eV）高于纯SnS2(- 0.001 eV)，表明其化学吸附更强，与实验结果一致。这项工作为开发高性能二氧化氮传感器提供了一种新的结构设计策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced NO2 sensing performance of hierarchical nanosheets-assembled SnO2/SnS2 hollow microsphere at low temperature

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Enhanced NO2 sensing performance of hierarchical nanosheets-assembled SnO2/SnS2 hollow microsphere at low temperature

Accurate monitoring of nitrogen dioxide (NO₂) is critical for environmental protection and human health. In this study, hierarchical SnS₂ hollow microspheres assembled from nanosheets were synthesized via a hydrothermal method, followed by the in-situ oxidation of SnS₂ to form SnO₂/SnS₂ nanocomposites at calcination temperatures ranging from 300 to 400 °C. The synergistic effect of the unique hollow morphology and the SnO₂-SnS₂ heterojunction significantly enhanced the NO₂ sensing performance. Gas-sensing tests revealed that the SnO₂/SnS₂-320 sensor (calcined at 320 °C) exhibited a better response value of 50 toward 5 ppm NO₂ at an optimal operating temperature of 100 °C, which is approximately 5 times higher than that of pristine SnS₂. Additionally, the SnO₂/SnS₂-320 sensor demonstrated excellent repeatability, long-term stability, and selectivity toward NO₂. Density functional theory (DFT) calculations further confirmed that the SnO₂/SnS₂ heterostructure exhibited a higher NO₂ adsorption energy (−0.040 eV) compared to pure SnS₂ (−0.001 eV), indicating stronger chemisorption, which is consistent with the experimental results. This work provides a novel structural design strategy for developing high-performance NO₂ sensors.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.