In situ deposition of hydroxyapatite on graphene nanosheets

Graphene nanosheets were effectively functionalized by in situ deposition of hydroxyapatite through a facile chemical precipitation method. Prior to grafting of hydroxyapatite, chemically modified graphene nanosheets were obtained by the reduction of graphene oxide in presence of ethylenediamine. The resulting hydroxyapatite functionalized graphene nanosheets were characterized by attenuated total reflection IR spectroscopy, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, X-ray energy dispersive spectroscopy, Raman spectroscopy and thermogravimetric analysis. These characterization techniques revealed the successful grafting of hydroxyapatite over well exfoliated graphene nanosheets without destroying their structure.

A facile chemical precipitation method is reported for effective in situ deposition of hydroxyapatite on graphene nanosheets. Prior to grafting of hydroxyapatite, chemically modified graphene nanosheets were obtained by the reduction of graphene oxide in presence of ethylenediamine.Figure optionsDownload as PowerPoint slideHighlights
► It is a facile and effective method for deposition of HA on GR nanosheets.
► It avoids the use of harmful reducing agents like hydrazine, NaBH4 etc.
► GR nanosheets were produced using bio-compatible, ethylenediamine.
► The graphitic structure of synthesized GR nanosheets was high ordered.
► The ratio of Ca to P in HA was 1.64, which is close to ratio in natural bone.