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石墨烯量子点粉末JCGD-1-4,石墨烯量子点水溶液JCGD-1-4-W

石墨烯量子点粉末JCGD-1-4,石墨烯量子点水溶液JCGD-1-4-W


石墨烯量子点粉末JCGD-1-4







Fig. 1Microstructure of the as-prepared GQDs: (a) TEM image. Inset of (a): HR-TEM image. (b) Diameter distribution. (c) AFM image. (d) Height distribution.(e) Height profile along the line A–B.

Table 1  Inductively coupled plasma (ICP) analysis data of GQDs.

Samples(ppm)FeNiMnCuNaCa
GQDs2.60.80.83.6130.7270.5

 

Table 2  QY of GQDs using quinine sulfate as a reference.

 

SampleIntegrated emission intensity (I)Abs. (A) Refractive index of solvent (n)Quantum yield ( )
Quinine sulfate65134.50.05231.330.54 (known)
GQDs4321.60.03711.330.051

 


 



Fig. 2 (a) Raman spectrum of the GQDs. (b) XPS spectrum of the  GQDs.


Fig. 3(a)UV-vis absorption spectrum of the GQDs at different excitation wavelengths. Inset: Optical photograph of the GQDs dispersed in water under different wavelengths irradiation. (b) PL spectra of the GQDs at excitation wavelengths from 260 to 580 nm.

JCGD-1-4粉末价格:2500元/100毫克、4250元/200毫克、9000元/500毫克
JCGD-1-4-W水分散液价格:100元/20毫升,浓度0.25毫克/毫升

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