Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability

Quyen Vu Thi; Ngoc Quang Nguyen; Inwook Oh; Junpyo Hong; Chong Min Koo; Ngo Trinh Tung; Daewon Sohn

doi:10.1016/j.ceramint.2020.12.149

Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability

Quyen Vu Thi, Ngoc Quang Nguyen, Inwook Oh, Junpyo Hong, Chong Min Koo, Ngo Trinh Tung, Daewon Sohn

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

A composite of reduced graphene oxide (rGO) coated with metal-organic framework (MOF) HKUST-1 was synthesized using a facile hydrothermal method. The micro-frame of HKUST-1 was retained with the well-decorated octahedral framework on the surface of rGO sheets, resulting in the production of a scabrous, thorny trunk structure. The as-prepared composites exhibited the best shielding effectiveness at a weight ratio of 1:1 of the rGO:Cu(NO₃)₂.3H₂O precursor, with a total shielding value (SE_T) greater than 36 dB over a wide frequency range (i.e., from 8.2 to 18 GHz). The maximum SE_T of the composite exceeded 46.1 dB at 18 GHz, compared to a value of 36.6 dB in pristine rGO. The introduction of the HKUST-1 MOF, which was anchored to the surface of rGO, prevented sheet layers from aggregating and decreased the impedance mismatching by limiting the value of shielding effectiveness by reflection. The mechanism of electromagnetic shielding was attributed mainly to dielectric loss and synergic effects between rGO and HKUST-1.

Original language	English
Pages (from-to)	10027-10034
Number of pages	8
Journal	Ceramics International
Volume	47
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2020.12.149
Publication status	Published - 2021 Apr 1
Externally published	Yes

Keywords

Electromagnetic shielding
HKUST-1
Reduced graphene oxide
Thorny trunk structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2020.12.149

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title = "Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability",

abstract = "A composite of reduced graphene oxide (rGO) coated with metal-organic framework (MOF) HKUST-1 was synthesized using a facile hydrothermal method. The micro-frame of HKUST-1 was retained with the well-decorated octahedral framework on the surface of rGO sheets, resulting in the production of a scabrous, thorny trunk structure. The as-prepared composites exhibited the best shielding effectiveness at a weight ratio of 1:1 of the rGO:Cu(NO3)2.3H2O precursor, with a total shielding value (SET) greater than 36 dB over a wide frequency range (i.e., from 8.2 to 18 GHz). The maximum SET of the composite exceeded 46.1 dB at 18 GHz, compared to a value of 36.6 dB in pristine rGO. The introduction of the HKUST-1 MOF, which was anchored to the surface of rGO, prevented sheet layers from aggregating and decreased the impedance mismatching by limiting the value of shielding effectiveness by reflection. The mechanism of electromagnetic shielding was attributed mainly to dielectric loss and synergic effects between rGO and HKUST-1.",

keywords = "Electromagnetic shielding, HKUST-1, Reduced graphene oxide, Thorny trunk structure",

author = "Thi, {Quyen Vu} and Nguyen, {Ngoc Quang} and Inwook Oh and Junpyo Hong and Koo, {Chong Min} and Tung, {Ngo Trinh} and Daewon Sohn",

note = "Funding Information: This work was supported by the Creative Materials Discovery Program ( 2015M3D1A1068061 ) administered by the National Research Foundation of Korea (NRF) and funded by the Ministry of Science and ICT, Republic of Korea . DS thanks to the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2020R1A6A1A06046728 ). Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and Techna Group S.r.l.",

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T1 - Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability

AU - Thi, Quyen Vu

AU - Nguyen, Ngoc Quang

AU - Oh, Inwook

AU - Hong, Junpyo

AU - Koo, Chong Min

AU - Tung, Ngo Trinh

AU - Sohn, Daewon

N1 - Funding Information: This work was supported by the Creative Materials Discovery Program ( 2015M3D1A1068061 ) administered by the National Research Foundation of Korea (NRF) and funded by the Ministry of Science and ICT, Republic of Korea . DS thanks to the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2020R1A6A1A06046728 ). Publisher Copyright: © 2020 Elsevier Ltd and Techna Group S.r.l.

PY - 2021/4/1

Y1 - 2021/4/1

N2 - A composite of reduced graphene oxide (rGO) coated with metal-organic framework (MOF) HKUST-1 was synthesized using a facile hydrothermal method. The micro-frame of HKUST-1 was retained with the well-decorated octahedral framework on the surface of rGO sheets, resulting in the production of a scabrous, thorny trunk structure. The as-prepared composites exhibited the best shielding effectiveness at a weight ratio of 1:1 of the rGO:Cu(NO3)2.3H2O precursor, with a total shielding value (SET) greater than 36 dB over a wide frequency range (i.e., from 8.2 to 18 GHz). The maximum SET of the composite exceeded 46.1 dB at 18 GHz, compared to a value of 36.6 dB in pristine rGO. The introduction of the HKUST-1 MOF, which was anchored to the surface of rGO, prevented sheet layers from aggregating and decreased the impedance mismatching by limiting the value of shielding effectiveness by reflection. The mechanism of electromagnetic shielding was attributed mainly to dielectric loss and synergic effects between rGO and HKUST-1.

AB - A composite of reduced graphene oxide (rGO) coated with metal-organic framework (MOF) HKUST-1 was synthesized using a facile hydrothermal method. The micro-frame of HKUST-1 was retained with the well-decorated octahedral framework on the surface of rGO sheets, resulting in the production of a scabrous, thorny trunk structure. The as-prepared composites exhibited the best shielding effectiveness at a weight ratio of 1:1 of the rGO:Cu(NO3)2.3H2O precursor, with a total shielding value (SET) greater than 36 dB over a wide frequency range (i.e., from 8.2 to 18 GHz). The maximum SET of the composite exceeded 46.1 dB at 18 GHz, compared to a value of 36.6 dB in pristine rGO. The introduction of the HKUST-1 MOF, which was anchored to the surface of rGO, prevented sheet layers from aggregating and decreased the impedance mismatching by limiting the value of shielding effectiveness by reflection. The mechanism of electromagnetic shielding was attributed mainly to dielectric loss and synergic effects between rGO and HKUST-1.

KW - Electromagnetic shielding

KW - HKUST-1

KW - Reduced graphene oxide

KW - Thorny trunk structure

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JF - Ceramics International

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ER -

Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability

Abstract

Keywords

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