Synthesis and characterization of stable aqueous dispersions of graphene

Bulletin of materials science

Farah Surti⁵  Abhijit Saha¹  Debasish Roy³  Ujjal Kumar Sur²  Sannak Dutta Roy⁴  Balaprasad Ankamwar⁵  Aparna Datta¹ 

[1] UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata 700 098, India$$UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata 700 098, IndiaUGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata 700 098, India$$;Department of Chemistry, Behala College, Parnashree, University of Calcutta, Kolkata 700 060, India$$Department of Chemistry, Behala College, Parnashree, University of Calcutta, Kolkata 700 060, IndiaDepartment of Chemistry, Behala College, Parnashree, University of Calcutta, Kolkata 700 060, India$$;Department of Zoology, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, India$$Department of Zoology, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, IndiaDepartment of Zoology, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, India$$;Department of Physics, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, India$$Department of Physics, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, IndiaDepartment of Physics, Sammilani Mahavidyalaya, E.M. Bypass, Baghajatin Station, University of Calcutta, Kolkata 700 075, India$$;Bio-Inspired Materials Science Laboratory, Department of Chemistry, University of Pune, Ganeshkhind, Pune 411 007, India$$Bio-Inspired Materials Science Laboratory, Department of Chemistry, University of Pune, Ganeshkhind, Pune 411 007, IndiaBio-Inspired Materials Science Laboratory, Department of Chemistry, University of Pune, Ganeshkhind, Pune 411 007, India$$

关键词: Graphene;    zeta potential;    graphene oxide;    graphite;    dispersion;    Raman spectroscopy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

A stable aqueous dispersion (5 mg ml$^{�?1}$) of graphene was synthesized by a simple protocol based on three-step reduction of graphene oxide (GO) dispersion synthesized using the modified version of Hummers and Offeman method. Reduction of GO was carried out using sodium borohydride, hydrazine hydrate and dimethyl hydrazine as reducing agents. The chemically synthesized graphene was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV�?�visible absorption spectroscopy, Fourier transform infrared (FTIR) and Raman spectroscopy, thermogravimetric analysis (TGA), optical microscopy. The stability of aqueous dispersions of graphene was confirmed through zeta potential measurements and the negative zeta potentials of 55�??60 mV were obtained indicating the high stability of aqueous graphene dispersions.

【 授权许可】

Unknown