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  1. Article: Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

    Srivastava, Suneel Kumar / Manna, Kunal

    Journal of materials chemistry A. 2022 Apr. 5, v. 10, no. 14

    2022  

    Abstract: The increase in the use of electronic devices and communication systems and their critical applications in the military, industrial, commercial and consumer sectors have generated undesirable electromagnetic pollution, known as electromagnetic ... ...

    Abstract The increase in the use of electronic devices and communication systems and their critical applications in the military, industrial, commercial and consumer sectors have generated undesirable electromagnetic pollution, known as electromagnetic interference (EMI). This results in the lowering of their efficiency, including malfunctioning, and also has harmful effects on wildlife and humans. Therefore, in the last few decades, considerable research efforts have been focused on the shielding of this undesirable electromagnetic interference, leading to the development of efficient microwave absorption and EMI shielding materials. This article is focused on reviewing the electromagnetic interference shielding performance of carbonaceous, magnetic, and dielectric materials, their polymers, and intrinsically conducting polymer nanocomposites. The performances of core–shell nanocomposites and the importance of the hollow morphology in the development of high-performance microwave absorption and shielding materials are also reviewed. We also provide a conclusion and future perspectives on EMI shielding and microwave absorption.
    Keywords absorption ; electromagnetic interference ; magnetism ; pollution ; polymer nanocomposites ; wildlife
    Language English
    Dates of publication 2022-0405
    Size p. 7431-7496.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/d1ta09522f
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Reduced Graphene Oxide/Fe

    Manna, Rakesh / Srivastava, Suneel Kumar

    ACS omega

    2021  Volume 6, Issue 13, Page(s) 9164–9175

    Abstract: The present work is focused on fabrication of reduced graphene oxide/iron(II/III) oxide/polyaniline (RGO/ ... ...

    Abstract The present work is focused on fabrication of reduced graphene oxide/iron(II/III) oxide/polyaniline (RGO/Fe
    Language English
    Publishing date 2021-03-22
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c00382
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets.

    Ghosh, Kalyan / Srivastava, Suneel Kumar

    ACS omega

    2021  Volume 6, Issue 7, Page(s) 4582–4596

    Abstract: This study is focused on the preparation of the CuS/RGO nanocomposite via the hydrothermal method using GO and Cu-DTO complex as precursors. X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman and X-ray photoelectron spectroscopy study ... ...

    Abstract This study is focused on the preparation of the CuS/RGO nanocomposite via the hydrothermal method using GO and Cu-DTO complex as precursors. X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman and X-ray photoelectron spectroscopy study revealed the formation of the CuS/RGO nanocomposite with improved crystallinity, defective nanostructure, and the presence of the residual functional group in the RGO sheet. The morphological study displayed the transformation of CuS from nanowire to quantum dots with the incorporation of RGO. The galvanostatic charge/discharge curve showed that the CuS/RGO nanocomposite (12 wt % Cu-DTO complex) has tremendous and outperforming specific capacitance of 3058 F g
    Language English
    Publishing date 2021-02-05
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.0c05034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Room-Temperature One-Step Synthesis of Silver/Reduced Graphene Oxide Nanocomposites as an Excellent Microwave Absorber.

    Mondal, Jayanta / Srivastava, Suneel Kumar

    Langmuir : the ACS journal of surfaces and colloids

    2021  Volume 37, Issue 45, Page(s) 13409–13419

    Abstract: The present study is focused on room-temperature synthesis carried out by reduction of an aqueous silver nitrate ( ... ...

    Abstract The present study is focused on room-temperature synthesis carried out by reduction of an aqueous silver nitrate (AgNO
    Language English
    Publishing date 2021-11-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.1c02110
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Fabrication of N-Doped Reduced Graphite Oxide/MnCo

    Ghosh, Kalyan / Srivastava, Suneel Kumar

    Langmuir : the ACS journal of surfaces and colloids

    2021  Volume 37, Issue 6, Page(s) 2213–2226

    Abstract: The present work reports on the fabrication of a lightweight microwave absorber comprising ... ...

    Abstract The present work reports on the fabrication of a lightweight microwave absorber comprising MnCo
    Language English
    Publishing date 2021-02-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.0c03641
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Room-Temperature One-Step Synthesis of Silver/Reduced Graphene Oxide Nanocomposites as an Excellent Microwave Absorber

    Mondal, Jayanta / Srivastava, Suneel Kumar

    Langmuir. 2021 Nov. 05, v. 37, no. 45

    2021  

    Abstract: The present study is focused on room-temperature synthesis carried out by reduction of an aqueous silver nitrate (AgNO₃) and AgNO₃/graphene oxide (GO) dispersion using a low-cost commercial Fehling B solution in one step to form silver quantum dots (Ag ... ...

    Abstract The present study is focused on room-temperature synthesis carried out by reduction of an aqueous silver nitrate (AgNO₃) and AgNO₃/graphene oxide (GO) dispersion using a low-cost commercial Fehling B solution in one step to form silver quantum dots (Ag QDs) and their Ag/reduced graphene oxide (Ag/RGO) nanocomposites and their characterization. The crystallinity, surface chemistry, structural, and morphological studies indicated the formation of crystalline small-sized quasispherical-functionalized Ag particles distributed uniformly on the surface of RGO. The conductivity measurements further showed an improvement in the conductivity of Ag/RGO nanocomposites as compared to neat Ag QDs. Our findings showed that Ag/RGO nanocomposites prepared by using 0.055 wt % of GO exhibited a total enhanced electromagnetic interference (EMI)-shielding efficiency (SET) of ∼39.2–42.3 dB (2–8 GHz) with a maximum value of ∼43.8 dB at 7. 5 GHz due to conduction loss, an interconnected conducting network, and a synergistic effect, and it followed an absorption mechanism. Furthermore, this superior absorption-dominated shielding conferred reflection loss (RL) in the range of −79 to −82.5 dB with a RL minima of −88 dB at 7.5 GHz, considering an effective absorption bandwidth of ∼6 GHz with 99.9% absorptivity. It is anticipated that Ag/RGO nanocomposites prepared in one step at room temperature could find potential EMI-shielding applications.
    Keywords absorption ; absorptivity ; ambient temperature ; crystal structure ; electromagnetic interference ; graphene oxide ; nanocomposites ; silver ; silver nitrate ; synergism
    Language English
    Dates of publication 2021-1105
    Size p. 13409-13419.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.1c02110
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  7. Article: Fabrication of N-Doped Reduced Graphite Oxide/MnCo₂O₄ Nanocomposites for Enhanced Microwave Absorption Performance

    Ghosh, Kalyan / Srivastava, Suneel Kumar

    Langmuir. 2021 Feb. 05, v. 37, no. 6

    2021  

    Abstract: The present work reports on the fabrication of a lightweight microwave absorber comprising MnCo₂O₄ prepared from the urea complex of manganese (Mn)/cobalt (Co) and nitrogen-doped reduced graphite oxide (NRGO) by facile hydrothermal method followed by ... ...

    Abstract The present work reports on the fabrication of a lightweight microwave absorber comprising MnCo₂O₄ prepared from the urea complex of manganese (Mn)/cobalt (Co) and nitrogen-doped reduced graphite oxide (NRGO) by facile hydrothermal method followed by annealing process and characterized. The phase analysis, compositional, morphological, magnetic, and conductivity measurements indicated dispersion of paramagnetic MnCo₂O₄ spherical particles on the surface of NRGO. Our findings also showed that Mn, Co–urea complex, and GO in the weight ratio of 1:4 (NGMC3) exhibited maximum shielding efficiency in the range of 55–38 dB with absorption as an overall dominant shielding mechanism. The reflection loss of NGMC3 was found to be in the range of −90 to −77 dB with minima at −103 dB (at 2.9 GHz). Such outstanding electromagnetic wave absorption performance of NRGO/MnCo₂O₄ nanocomposite compared to several other metal cobaltates could be attributed to the formation of percolated network assisted electronic polarization, interfacial polarization and associated relaxation losses, conductance loss, dipole polarization and corresponding relaxation loss, impedance matching, and magnetic resonance to some extent.
    Keywords absorption ; electromagnetic radiation ; graphene ; graphene oxide ; hot water treatment ; magnetism ; manganese ; nanocomposites ; urea
    Language English
    Dates of publication 2021-0205
    Size p. 2213-2226.
    Publishing place American Chemical Society
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.0c03641
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  8. Article ; Online: Visible Light-Assisted Degradation of Sulfamethoxazole on 2D/0D Sulfur-Doped Bi

    Parida, Vishal Kumar / Srivastava, Suneel Kumar / Chowdhury, Shamik / Gupta, Ashok Kumar

    Langmuir : the ACS journal of surfaces and colloids

    2023  Volume 39, Issue 51, Page(s) 18846–18865

    Abstract: Retrieving the spent photocatalysts from the reaction system is always a challenging task. Therefore, the present work is focused on immobilizing sulfur-doped- ... ...

    Abstract Retrieving the spent photocatalysts from the reaction system is always a challenging task. Therefore, the present work is focused on immobilizing sulfur-doped-Bi
    Language English
    Publishing date 2023-12-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c02733
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Tuning of Shells in Trilaminar Core@Shell Nanocomposites in Controlling Electromagnetic Interference through Switching of the Shielding Mechanism.

    Manna, Kunal / Srivastava, Suneel Kumar

    Langmuir : the ACS journal of surfaces and colloids

    2020  Volume 36, Issue 16, Page(s) 4519–4531

    Abstract: ... ...

    Abstract Fe
    Language English
    Publishing date 2020-04-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.9b03313
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Superior supercapacitor performance of Bi

    Ghosh, Kalyan / Srivastava, Suneel Kumar

    Dalton transactions (Cambridge, England : 2003)

    2020  Volume 49, Issue 46, Page(s) 16993–17004

    Abstract: The present work is focused on the synthesis of bismuth sulfide (Bi2S3) nanorod/reduced graphene oxide (RGO) composites via a one-step hydrothermal method using GO and bismuth nitrate in 5 : 1, 3 : 1 and 2 : 1 weight ratios and their characterization. ... ...

    Abstract The present work is focused on the synthesis of bismuth sulfide (Bi2S3) nanorod/reduced graphene oxide (RGO) composites via a one-step hydrothermal method using GO and bismuth nitrate in 5 : 1, 3 : 1 and 2 : 1 weight ratios and their characterization. The morphological studies revealed the formation of homogeneously dispersed Bi2S3 nanorods on RGO sheets along with occasional wrapping in the Bi2S3 nanorod/RGO (3 : 1) composite. XRD, FTIR, Raman and XPS studies suggested the incorporation of Bi2S3 in RGO sheets. The galvanostatic charge-discharge measurements showed that the Bi2S3 nanorod/RGO (3 : 1) composite exhibited the highest specific capacitance (1932 F g-1) at 1 A g-1 in the presence of 2 M aqueous KOH in a three-electrode cell. This is ascribed to the enhanced contact area between metal sulfide nanoparticles and RGO, increased conductivity and synergistic effect of Bi2S3 and RGO. The optimized Bi2S3 nanorod/RGO (3 : 1) composite also maintained an excellent cycling stability with ∼100% capacitance retention after 700 cycles. It is noted that the supercapacitor performance of the Bi2S3 nanorod/RGO (3 : 1) composite was better than group V and VI metal chalcogenides and their nanocomposites reported in several previous studies.
    Language English
    Publishing date 2020-11-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d0dt03594g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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