Reduced graphene oxide with La@Co3O4 and La@CdO nanocomposite based sensors: synthesis, characterization and NO2 sensing properties

IF 2.2 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-07-24 DOI:10.1007/s13738-024-03075-x

Kiran Sabir Ali, Muhammad Sabir Zahoor, Muhammad Tariq, Hafiz Muhammad Asif, Shabbir Hussain, Jafir Hussain Shirazi

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Abstract

In the present study, we report fabrication of La@Co₃O₄ and La@CdO with rGO as new materials for NO₂ sensing at a temperature range of 30–90 °C. The nanocomposites were characterized using various characterization tools like FTIR, Powder XRD and SEM to determine the composition and morphology of the nanocomposite sensors. The sensing properties such as sensor response, response time and recovery time were measured. The obtained results exhibited that rGO/La@Co₃O₄ showed a response of 2.9 while rGO /La@CdO is 2.4 at 50 °C. The sensor exhibited high selectivity to NO₂, which is explained by a higher affinity for NO₂ compared to other environmental pollutant gases like Cl₂, NO, H₂O and CO. The sensing mechanism was explained by the synergistic effect of reduced graphene with La@Co₃O₄ and La@CdO.

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基于还原氧化石墨烯与 La@Co3O4 和 La@CdO 纳米复合材料的传感器：合成、表征和二氧化氮传感特性

在本研究中，我们报告了用 rGO 制备 La@Co3O4 和 La@CdO 作为新材料在 30-90 °C 温度范围内进行二氧化氮传感的情况。利用傅立叶变换红外光谱、粉末 XRD 和扫描电镜等多种表征工具对纳米复合材料进行了表征，以确定纳米复合传感器的组成和形态。测量了传感器响应、响应时间和恢复时间等传感特性。结果表明，在 50 °C 时，rGO/La@Co3O4 的响应为 2.9，而 rGO /La@CdO 为 2.4。与 Cl2、NO、H2O 和 CO 等其他环境污染气体相比，该传感器对 NO2 具有更高的亲和力，因此对 NO2 具有高选择性。其传感机理可通过还原石墨烯与 La@Co3O4 和 La@CdO 的协同效应来解释。

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来源期刊

Journal of the Iranian Chemical Society 化学-化学综合

CiteScore

4.40

自引率

8.30%

发文量

230

审稿时长

5.6 months

期刊介绍： JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.