Selective H2S sensor with CdS@PPy/rGO nanocomposite for sustainable air quality monitoring

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-26 DOI:10.1016/j.diamond.2025.112155

H.M. Ragab , N.S. Diab , Ghadah Mohammad Aleid , Rosilah Ab Aziz , Sofian Talal Obeidat , N. Yusof , Maamon A. Farea

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Abstract

In this study, a highly sensitive and selective H₂S gas sensor was developed using a CdS@PPy/rGO nanocomposite synthesized through a facile fabrication process. Conductivity, sensitivity, response/recovery durations, stability, and selectivity were all significantly enhanced by the incorporation of reduced graphene oxide (rGO) and cadmium sulfide (CdS) nanoparticles into the polypyrrole (PPy) matrix. The chemoresistive sensor exhibited a remarkable response of 98.98 % to 70 ppm of H₂S gas, which is approximately five times higher than pure PPy and three times higher than the PPy/rGO hybrids. Notably, the sensor demonstrated remarkable stability over 50 days with no performance deterioration, and it exhibited quick reaction and recovery times of 128 s and 131 s, respectively. Furthermore, the CdS@PPy/rGO sensor demonstrated excellent selectivity towards H₂S, maintaining its high performance even in the presence of interfering gases such as SO₂, NH₃, CO, and NO₂. Mechanistic analysis revealed that the synergistic effect of rGO and CdS nanoparticles enhanced the adsorption and electron transfer interactions between the composite and H₂S molecules. This work highlights the potential of CdS@PPy/rGO nanocomposites as advanced materials for real-time environmental monitoring and industrial safety applications.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.