化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (3) : 209-214. DOI: 10.19817/j.cnki.issn1006-3536.2026.03.006

开发与应用

CdS@In₂O₃中空纳米纤维的制备及其气敏性能研究

作者信息 +

Preparation and gas sensing properties of CdS@In₂O₃ hollow nanofibers

Xia Tao, Li Douyi, Xiong Changjun, Sun Yongjiao, Hu Jie

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Received		Published
2025-02-16		2026-03-20
Issue Date	Revised Date
2026-03-16	2025-02-16

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摘要

采用静电纺丝和水热法制备了毛刷状氧化铟(In₂O₃)纳米纤维,并通过退火使其形成中空层级结构,通过负载CdS量子点,得到CdS@In₂O₃中空纳米纤维,在此基础上制备了CdS@In₂O₃中空纳米纤维传感器。利用扫描电子显微镜、能谱分析仪和X射线衍射仪对材料的形貌、组分和结构进行表征,并测试了传感器的气敏性能。结果表明:相较于纯In₂O₃中空纳米纤维传感器,CdS@In₂O₃中空纳米纤维传感器对NO₂的气敏性能显著提升,其中CdS负载量为2%(摩尔分数)的CdS@In₂O₃中空纳米纤维传感器性能最优,对体积分数2×10^-6 NO₂的响应高达29.16,响应/恢复时间为284s/233s,检测限低至0.2×10^-6,可用于微量气体的检测,且传感器具有优异的选择性、耐湿性、重复性和长期稳定性。

Abstract

The brush-like In₂O₃ nanofibers were prepared by electrospinning and hydrothermal methods,and then an annealing process was carried out to form a hollow hierarchical structure.After being loaded with CdS quantum dots at different molar ratios,the CdS@ In₂O₃ hollow nanofiber materials were obtained,which were further utilized to fabricate CdS@In₂O₃ hollow nanofiber sensors.The morphology,composition,and structure of the materials were characterized by scanning electron microscopy (SEM),energy-dispersive spectrometer (EDS),and X-ray diffractometer (XRD).The gas-sensing performance of the fabricated sensors was also tested.The experimental results showed that,compared with pure In₂O₃ nanofiber sensors,the gas-sensing performance of the CdS@In₂O₃ hollow nanofiber sensors for NO₂ was significantly improved.Among the CdS@ In₂O₃ hollow nanofiber sensors with different molar ratios,the CdS@In₂O₃ hollow nanofiber sensor with a CdS loading of 2% (molar fraction) demonstrated optimal performance,with a response of 29.16 to 2×10^-6 NO₂ and the response/recovery time of 284s/233s,and a detection limit as low as 0.2×10^-6,making it suitable for the detection of trace gases.The sensor also exhibited excellent selectivity,moisture resistance,repeatability,and long-term stability.

关键词

气体传感器 / 静电纺丝 / 氧化铟 / 中空纳米纤维 / CdS量子点

Key words

gas sensor / electrospinning / In₂O₃ / hollow nanofiber / CdS quantum dots

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CdS@In₂O₃中空纳米纤维的制备及其气敏性能研究[J]. 化工新型材料, 2026, 54(3): 209-214 DOI:10.19817/j.cnki.issn1006-3536.2026.03.006

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