이온교환법에 의한 환원 그래핀-금속 하이브리드 소재의 합성 및 특성
Synthesis of Reduced Graphene-metal Hybrid Materials via Ion-exchange Method and its Characterization
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본 연구에서는 그래핀 소재의 전기전도성 및 자기적 특성을 향상시키기 위해 산화그래핀 표면상의 산소를 포함한 기능기와 열처리 환원공정을 이용하여 환원그래핀과 금속소재를 하리브리드화 하였다. 산화 그래핀 표면의 –OH, - COOH 등의 산소 포함 기능기들을 열처리 환원시킴과 동시에 금속이온을 기능기와의 이온교환법에 의해 치환 합성하는연구를 진행하였다. 하이브리드 소재 합성에 사용된 금속은 Fe, Ag, Ni, Zn, Fe/Ag이며 SEM, TEM 및 EDS를 통해 환원 그래핀 표면 위에 균일한 크기의 금속 입자가 비교적 구형 잘 분산되었음을 확인하였다. 그래핀 표면상의 금속입자들은 모두 산화물 형태의 구조를 가지고 있었다. 하이브리드 소재의 전기적 특성을 확인하기 위해 rGO-metal hybrid 시료를 PET film에 dip-coating 방법으로 후막 필름을 형성시킨 후 면저항을 측정하였고, SEM을 통해 시편의 두께를 측정하여 비저항을 계산한 결과, 비저항의 범위는 2.14×10−5 ~ 3.5×10−3 ohm/cm범위에 있음을 확인하였다.
Abstract
In this study, hybridization of graphene oxide and metal was carried out by the functional groups containing oxygen and thermal treatment for reduction in order to enhance the electrical conductivity and magnetic properties of graphene materials. Graphene-metal hybrid materials were synthesized using the oxygen-containing functional groups (- OH, -COOH and so on) on the surface of graphene oxide by replacing them with metal ions via ion exchange method as well as thermal reduction. The metals used in this study were Fe, Ag, Ni, Zn, and Fe/Ag, and it was confirmed that metal particles of uniform size were well dispersed on the graphene surface through SEM, TEM, and EDS. All of the metal particles on the graphene surface had an oxide-crystalline structure. To check the electrical properties, sheet resistance of the rGO-metal hybrid sample was measured on the PET film made by the dip-coating, and the specific resistance was calculated by measuring the thickness of the specimen through SEM. As a result, the specific resistance was in the range of 2.14×10−5 and 3.5×10−3 ohm/cm.
참고문헌 (31)
- 이수정, "나노 은을 이용한 전자파 차폐 직물이 뇌파에 미치는 영향", 한국의류산업학회지, 6(6), pp.810~814 (2004), 한국의류산업학회
- S. Yasufuku, "Application of aramid film to electrical and electronic uses in Japan", IEEE Electrical insulation Magazine, 11(6), pp.27~ (1995)
- A. Ahlbom, "Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz)", Health Physics, 74(4), pp.494~ (1998)
- J. R. Potts, "Graphene-based polymer nanocomposites", Polymer, 52(1), pp.5~ (2011)
- A. K. Geim, "The rise of graphene", Nat. Mater, 6, pp.183~ (2007)
- S. Wang, "High Mobility, Printable, and Solution-Processed Graphene Electronics", Nano Lett, 10(1), pp.92~ (2010)
- 이태원, "그래핀 첨가에 따른 신축성 카본전극의 전기적 특성 변화", 마이크로전자 및 패키징학회지, 21(4), pp.77~82 (2014), 한국마이크로전자및패키징학회[DOI]
- J. S. Bunch, "Electromechanical Resonators from Graphene Sheets", Science, 315(5811), pp.490~ (2007)
- C. G. Liu, "Graphene-Based Supercapacitor with an Ultrahigh Energy Density", Nano Lett, 10(12), pp.4863~ (2010)
- J. L. Xia, "Effect of Top Dielectric Medium on Gate Capacitance of Graphene Field Effect Transistors: Implications in Mobility Measurements and Sensor Applications", Nano Lett, 10(12), pp.5060~ (2010)
- 이성태, "고출력 전자 패키지 기판용 고열전도 h-BN", PVA 복합필름, 2018, pp.25(4), 95~99[DOI]
- H. Bai, "Functional Composite Materials Based on Chemically Converted Graphene", Adv. Mater, 23(9), pp.1089~ (2011)
- S. Park, "Chemical methods for the production of graphenes", Nat. Nanotechnol, 4, pp.217~ (2009)
- T. Wei, "Preparation of graphene nanosheet", polymer composites using in situ reduction–extractive dispersion, 2009, pp.47(9), 2296~
- S. Stankovich, "Graphene-based composite materials", Nature, 442, pp.282~ (2006)
- S. Stankovich, "Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly(sodium 4-styrenesulfonate)", J. Mater. Chem, 16, pp.155~ (2006)
- T. Wei, "Preparation of graphene nanosheet", polymer composites using in situ reduction–extractive dispersion, 2009, pp.47(9), 2296~
- C. Xu, "Graphene−Metal Particle Nanocomposites", J. Phys. Chem. C, 112(50), pp.19841~ (2008)
- J. Lu, "Nanometal-Decorated Exfoliated Graphite Nanoplatelet Based Glucose Biosensors with High Sensitivity and Fast Response", Acs Nano, 2(9), pp.1825~ (2008)
- Y. C. Si, "Exfoliated Graphene Separated by Platinum Nanoparticles", Chem. Mater, 20(21), pp.6792~ (2008)
- A. P. Yu, "Graphite Nanoplatelet−Epoxy Composite Thermal Interface Materials", J. Phys. Chem. C, 111(21), pp.7565~ (2007)
- J. Li, "Ag", Graphene Heterostructures: Synthesis, Characterization and Optical Properties, 2010, pp.2010(8), 1244~
- A. Antony, "The effect of the pH value on the growth and properties of chemical-bath-deposited ZnS thin films", Mater. Chem. Phys, 90(1), pp.106~ (2005)
- S. Guo, "Graphene oxide–Fe2O3 hybrid material as highly efficient heterogeneous catalyst for degradation of organic contaminants", Carbon, 60, pp.437~ (2013)
- W. Wei, "Oriented silver oxidenanostructures synthesized through a templatefree electrochemical route", J. Mater. Chem, 21(2), pp.432~ (2011)
- G. I. N. Waterhouse, "Synthesis, vibrational spectra and thermal stability of Ag3O4and related Ag7O8X salts (X= NO3-, ClO4-, HSO4-)", Polyhedron, 26(13), pp.3310~ (2007)
- P. Prieto, "XPS study of silver, nickel and bimetallic silver–nickel nanoparticles prepared by seed-mediated growth", Appl. Surf. Sci, 258(22), pp.8807~ (2012)
- M. C. Biesinger, "X?ray photoelectron spectroscopic chemical state quantification of mixed nickel metal, oxide and hydroxide systems", Surf. Interface Anal, 41(4), pp.324~ (2009)
- H. W. Nesbitt, "Interpretation of Ni2p XPS spectra of Ni conductors and Ni insulators", Phys. Chem. Miner, 27, pp.357~ (2000)
- N. Li, "Enhanced electrocatalytic oxidation of dyes in aqueous solution using cobalt phthalocyanine modified activated carbon fiber anode", Science China Chemistry, 56, pp.1757~ (2013)
- G. Carraro, "Ag and Pt Particles Sputtered on β-Fe2O3: An XPS Investigation", Surface Science Spectra, 19(1), pp.1~ (2012)