Humidity‐Resistant CeO2/In2O3 Nanocomposite‐Based Chemiresistor for Selective Detection of Formaldehyde

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-04-24 DOI:10.1002/smll.202410023

Ajeet Singh, Brij Mohan, Vijay Pratap, Wei Sun, Armando J. L. Pombeiro, Bal Chandra Yadav

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引用次数: 0

Abstract

Formaldehyde is a frequent indoor pollutant that poses a risk to human and environmental health and is suspected to be a carcinogen. However, achieving high sensitivity and selectivity for real‐time applications remains challenging. In this study, a room‐temperature operated formaldehyde chemiresistor is developed by cerium dioxide/indium oxide (CeO2/In2O3) nanocomposite for exclusive detection. The nanocomposite is synthesized using hydrothermal, forming CeO2 nanospheres grown on In2O3 nanocubes. This unique structure enhances the sensing capabilities of CeO2/In2O3, allowing it to detect formaldehyde in the 1–50 ppm range, and a 0.157 ppm detection limit is earned. The sensor exhibits an impressive response of 175.05 at 50 ppm at room temperature and shows responsiveness to various other substances, for instance, methanol, ethanol, aniline, benzene, toluene, acetone, and ammonia. Additionally, the CeO2/In2O3 sensor demonstrated moderate to high selectivity, sensitivity, stability, speedy response/recovery times, and resilience to humidity. This work presents a promising strategy for the detection of formaldehyde.

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耐湿CeO2/In2O3纳米复合材料基选择性检测甲醛的化学电阻器

甲醛是一种常见的室内污染物，对人体和环境健康构成威胁，被怀疑是致癌物。然而，实现实时应用的高灵敏度和选择性仍然具有挑战性。在本研究中，利用二氧化铈/氧化铟（CeO2/In2O3）纳米复合材料开发了一种室温操作的甲醛化学电阻器，用于特异性检测。采用水热法制备了纳米复合材料，形成了生长在In2O3纳米立方上的CeO2纳米球。这种独特的结构增强了CeO2/In2O3的传感能力，使其能够检测1-50 ppm范围内的甲醛，并获得0.157 ppm的检测限。在室温下，该传感器在50ppm下显示出令人印象深刻的175.05的响应，并显示对各种其他物质的响应，例如，甲醇，乙醇，苯胺，苯，甲苯，丙酮和氨。此外，CeO2/In2O3传感器表现出中等到高选择性、灵敏度、稳定性、快速响应/恢复时间和对湿度的弹性。这项工作提出了一个有前途的策略甲醛的检测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

期刊介绍： Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.