TY - JOUR
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 ).
PY - 2020
Y1 - 2020
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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U2 - 10.1016/j.ceramint.2020.12.149
DO - 10.1016/j.ceramint.2020.12.149
M3 - Article
AN - SCOPUS:85098134147
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
ER -