Shahzad, Faisal Kumar, Pradip Kim, Yoon-Hyun Hong, Soon Man Koo, Chong Min 2024-01-20T04:31:38Z 2024-01-20T04:31:38Z 2022-01-10 2016-04-13 1944-8244 https://pubs.kist.re.kr/handle/201004/124170 Electrically conductive thin carbon materials have attracted remarkable interest as a shielding material to mitigate the electromagnetic interference (EMI) produced by many telecommunication devices. Herein, we developed a sulfur-doped reduced graphene oxide (SrGO) with high electrical conductivity through using a novel biomass, mushroom-based sulfur compound (lenthionine) via a twostep thermal treatment. The resultant SrGO product exhibited excellent electrical conductivity of 311 S cm(-1), which is 52% larger than 205 S cm(-1) for undoped rGO. SrGO also exhibited an excellent EMI shielding effectiveness of 38.6 dB, which is 61% larger than 24.4 dB measured for undoped rGO. Analytical examinations indicate that a sulfur content of 1.95 atom % acts as n-type dopant, increasing electrical conductivity and, therefore, EMI shielding of doped graphene. English American Chemical Society OXYGEN REDUCTION REACTION METAL-FREE ELECTROCATALYSTS ELECTRICAL-PROPERTIES MICROWAVE-ABSORPTION CHEMICAL-REDUCTION GRAPHITE OXIDE COMPOSITES PERFORMANCE LIGHTWEIGHT FACILE Biomass-Derived Thermally Annealed Interconnected Sulfur-Doped Graphene as a Shield against Electromagnetic Interference Article 10.1021/acsami.6b00418 1 ACS Applied Materials & Interfaces, v.8, no.14, pp.9361 - 9369 ACS Applied Materials & Interfaces 8 14 9361 9369 scie scopus 000374274900060 2-s2.0-84964892211 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article OXYGEN REDUCTION REACTION METAL-FREE ELECTROCATALYSTS ELECTRICAL-PROPERTIES MICROWAVE-ABSORPTION CHEMICAL-REDUCTION GRAPHITE OXIDE COMPOSITES PERFORMANCE LIGHTWEIGHT FACILE graphene sulfur doping biomass electrical conductivity electromagnetic interference shielding