Room-temperature synthesis and enhanced catalytic performance of silver-reduced graphene oxide nanohybrids

  • Tran Viet Thu
  • Pil Ju Ko
  • Nguyen Huu Huy Phuc
  • Adarsh Sandhu
Research Paper


The synthesis of supported, ultrasmall metallic nanoparticles (NPs) is of great importance for catalytic applications. In this study, silver-reduced graphene oxide nanohybrids (Ag–rGO NHs) were prepared by reducing Ag ions and graphene oxide (GO) at room temperature using sodium borohydride (NaBH4) and trisodium citrate. The resulting products were characterized using UV–Vis spectroscopy, X-ray diffraction, Raman spectroscopy, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy. The rich chemistry of GO surface provided many sites for the nucleation of Ag ions and efficiently limited their growth. Ag NPs were uniformly grown on basal planes of rGO with a high density (~1,700 NPs μm−2) and well-defined size (3.6 ± 0.6 nm) as evidenced in SEM and HRTEM studies. The resulting Ag–rGO NHs were readily dispersed in water and exhibited enhanced catalytic activity toward the reduction of 4-nitrophenol by NaBH4 in comparison to unsupported Ag NPs. The role of rGO as an excellent support for Ag catalyst is discussed.


Graphene oxide Silver nanoparticles Nanohybrids Catalysis 



This study was supported by a start-up Grant from the Electronics-Inspired Interdisciplinary Research Institute (EIIRIS) at Toyohashi University of Technology, Japan. The authors would like to thank Prof. Atsunori Matsuda, Dr. Ryugo Tero, Dr. Naoko Yoshida, Dr. Yuu Hirose and Mr. Hirokazu Muramoto of Toyohashi University of Technology for their support in experimental facilities and characterizations of materials. Ito Kokuen Co. Ltd. is thanked for providing graphite flakes.

Conflict of interest

The authors declare no competing financial interest.

Supplementary material

11051_2013_1975_MOESM1_ESM.docx (1.3 mb)
Size distribution of Ag NPs grown on rGO, SEM and TEM images of unsupported Ag NPs synthesized in the absence of GO, UV-vis spectrum and TEM image of Ag-rGO NHs synthesized without TSC, and catalytic performance of several noble NPs.(DOCX 1344 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Electronics-Inspired Interdisciplinary Research InstituteToyohashi University of TechnologyAichiJapan
  2. 2.Department of Electrical and Electronic Information EngineeringToyohashi University of TechnologyAichiJapan

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