The nanocomposite was characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Raman spectra (RS). 
XRD
The nanocomposite was characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Raman spectra (RS). 
SEM
The nanocomposite was characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Raman spectra (RS). 
TEM
The nanocomposite was characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Raman spectra (RS).  12.6 nm were well-dispersed on the surface of the graphene nanosheets. 
RS
The optical properties were investigated by fluorescence (PL) and UV diffuse reflectance (UV-VIS).  It showed that the nanocomposite displayed a fluorescence quenching property. 
PL
The optical properties were investigated by fluorescence (PL) and UV diffuse reflectance (UV-VIS). 
UV-VIS