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Room-Temperature ppb-Level H2S Gas Sensors Based on Ag Nanowire/Hollow PPy Nanotube Nanocomposites. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10080305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
H2S gas sensors were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite (Ag NW/hollow PPy NT) film for sensing ppb-level H2S gas at room temperature. The morphology, phase composition and crystalline structure of Ag NW/hollow PPy NT nanocomposites were analyzed via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier-transform infrared spectroscopy (FTIR). TEM and SEM images revealed that Ag NWs were well dispersed in the hollow PPy NT matrix. IR results showed no interaction between Ag NWs and hollow PPy NTs in the Ag NW/hollow PPy NT nanocomposites. The effect of the amount of added Ag NWs on the response of the Ag NW/hollow PPy NT nanocomposites to the ppb-level H2S gas was investigated. Comparative gas-sensing results revealed that the introduction of Ag NWs onto hollow PPy NTs was effective in promoting the sensor response to H2S gas. More importantly, the Ag NW/hollow PPy NT nanocomposite had a strong response to ppb-level H2S gas at room temperature.
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Xu J, Chen R, Yun Z, Bai Z, Li K, Shi S, Hou J, Guo X, Zhang X, Chen J. Lightweight Epoxy/Cotton Fiber-Based Nanocomposites with Carbon and Fe 3O 4 for Electromagnetic Interference Shielding. ACS OMEGA 2022; 7:15215-15222. [PMID: 35572748 PMCID: PMC9089691 DOI: 10.1021/acsomega.2c01293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/11/2022] [Indexed: 06/15/2023]
Abstract
Cotton fiber (CF)-based electroconductive papers were prepared by facile aqueous dispersion and drying processes combined with carbon nanotubes (CNTs) or graphene nanosheets (GNPs). To enhance the electromagnetic interference (EMI) shielding performance of the manufactured nanocomposites, the electroconductive papers were soaked with epoxy resin, which cooperated with the inner sprayed Fe3O4 nanoparticles. The EMI shielding effectiveness of Epoxy/CF-30-Fe3O4-30GNPs reached 33.1 dB, of which over 85.0% is attributed to absorption, which is mainly believed to be caused by the combination of GNPs and Fe3O4 nanoparticles due to their special structures and synergetic effects. Moreover, the infiltration of epoxy between the randomly distributed loose CFs and the multiple reflections inside the interconnected networks could also help to improve the EMI shielding performance of GNP-added samples. The prepared lightweight and stiff Epoxy/CF-30-Fe3O4-30GNP composites have promising applications in civil or military fields.
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Affiliation(s)
- Jianwei Xu
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Ruiyue Chen
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Zhigeng Yun
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Zhongyi Bai
- School
of Materials Science and Engineering, Henan Key Laboratory of Aeronautical
Materials and Application Technology, Zhengzhou
University of Aeronautics, Zhengzhou 450046, China
| | - Kun Li
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Shaozhe Shi
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Junji Hou
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Xiaoqin Guo
- School
of Materials Science and Engineering, Henan Key Laboratory of Aeronautical
Materials and Application Technology, Zhengzhou
University of Aeronautics, Zhengzhou 450046, China
| | - Xiaoli Zhang
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Jingbo Chen
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
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