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High-quality reduced graphene oxide-nanocrystalline platinum hybrid materials prepared by simultaneous co-reduction of graphene oxide and chloroplatinic acid.

Wang Y, Liu J, Liu L, Sun DD - Nanoscale Res Lett (2011)

Bottom Line: The resultant RGO-Pt hybrid materials were characterized using transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy, and thermogravimetric analysis.Platinum (Pt) nanoparticles were anchored randomly onto the reduced GO (RGO) sheets with average mean diameters of 1.76 (pH 7) and 1.93 nm (pH 10).The significant Pt diffraction peaks and the decreased intensity of (002) peak in the XRD patterns of RGO-Pt hybrid materials confirmed that the Pt nanoparticles were anchored onto the RGO sheets and intercalated into the stacked RGO layers at these two pH values.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore. JCLiu@ntu.edu.sg.

ABSTRACT
Reduced graphene oxide-nanocrystalline platinum (RGO-Pt) hybrid materials were synthesized by simultaneous co-reduction of graphene oxide (GO) and chloroplatinic acid with sodium citrate in water at 80°C, of pH 7 and 10. The resultant RGO-Pt hybrid materials were characterized using transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Platinum (Pt) nanoparticles were anchored randomly onto the reduced GO (RGO) sheets with average mean diameters of 1.76 (pH 7) and 1.93 nm (pH 10). The significant Pt diffraction peaks and the decreased intensity of (002) peak in the XRD patterns of RGO-Pt hybrid materials confirmed that the Pt nanoparticles were anchored onto the RGO sheets and intercalated into the stacked RGO layers at these two pH values. The Pt loadings for the hybrid materials were determined as 36.83 (pH 7) and 49.18% (pH 10) by mass using XPS analysis. With the assistance of oleylamine, the resultant RGO-Pt hybrid materials were soluble in the nonpolar organic solvents, and the dispersion could remain stable for several months.

No MeSH data available.


FTIR spectra of the GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10.
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Figure 6: FTIR spectra of the GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10.

Mentions: Figure 6 presents the FTIR spectra of GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10. For the spectrum of GO, the broad band ranging from 3600 to 3000 cm-1 corresponds to the O-H stretching vibrations of adsorbed water molecules [45]. The bands at 1730 and 1039 cm-1 are assigned to the C = O and C-OH stretching vibrations of COOH groups, respectively [46]. The band at 1620 cm-1 is assigned to the vibration of the adsorbed water molecules as well as to the contributions from the skeletal vibrations of un-oxidized graphitic domains [47]. The spectrum of RGO-Pt-2 is similar to that of GO, indicating that the GO sheets were not reduced at pH 2. For the spectra of RGO-Pt-7 and RGO-Pt-10, the broad bands centered at 1212 and 1218 cm-1, respectively, are ascribed to the C-O stretching vibrations of the phenolic and carboxylic groups from the reduced GO sheets [48,49]. Moreover, the broad bands at 1574 cm-1 for both the samples are assigned to the C = C skeletal vibration of graphene sheets [45], which confirms the successful reduction of GO sheets.


High-quality reduced graphene oxide-nanocrystalline platinum hybrid materials prepared by simultaneous co-reduction of graphene oxide and chloroplatinic acid.

Wang Y, Liu J, Liu L, Sun DD - Nanoscale Res Lett (2011)

FTIR spectra of the GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211302&req=5

Figure 6: FTIR spectra of the GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10.
Mentions: Figure 6 presents the FTIR spectra of GO, RGO-Pt-2, RGO-Pt-7, and RGO-Pt-10. For the spectrum of GO, the broad band ranging from 3600 to 3000 cm-1 corresponds to the O-H stretching vibrations of adsorbed water molecules [45]. The bands at 1730 and 1039 cm-1 are assigned to the C = O and C-OH stretching vibrations of COOH groups, respectively [46]. The band at 1620 cm-1 is assigned to the vibration of the adsorbed water molecules as well as to the contributions from the skeletal vibrations of un-oxidized graphitic domains [47]. The spectrum of RGO-Pt-2 is similar to that of GO, indicating that the GO sheets were not reduced at pH 2. For the spectra of RGO-Pt-7 and RGO-Pt-10, the broad bands centered at 1212 and 1218 cm-1, respectively, are ascribed to the C-O stretching vibrations of the phenolic and carboxylic groups from the reduced GO sheets [48,49]. Moreover, the broad bands at 1574 cm-1 for both the samples are assigned to the C = C skeletal vibration of graphene sheets [45], which confirms the successful reduction of GO sheets.

Bottom Line: The resultant RGO-Pt hybrid materials were characterized using transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy, and thermogravimetric analysis.Platinum (Pt) nanoparticles were anchored randomly onto the reduced GO (RGO) sheets with average mean diameters of 1.76 (pH 7) and 1.93 nm (pH 10).The significant Pt diffraction peaks and the decreased intensity of (002) peak in the XRD patterns of RGO-Pt hybrid materials confirmed that the Pt nanoparticles were anchored onto the RGO sheets and intercalated into the stacked RGO layers at these two pH values.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore. JCLiu@ntu.edu.sg.

ABSTRACT
Reduced graphene oxide-nanocrystalline platinum (RGO-Pt) hybrid materials were synthesized by simultaneous co-reduction of graphene oxide (GO) and chloroplatinic acid with sodium citrate in water at 80°C, of pH 7 and 10. The resultant RGO-Pt hybrid materials were characterized using transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Platinum (Pt) nanoparticles were anchored randomly onto the reduced GO (RGO) sheets with average mean diameters of 1.76 (pH 7) and 1.93 nm (pH 10). The significant Pt diffraction peaks and the decreased intensity of (002) peak in the XRD patterns of RGO-Pt hybrid materials confirmed that the Pt nanoparticles were anchored onto the RGO sheets and intercalated into the stacked RGO layers at these two pH values. The Pt loadings for the hybrid materials were determined as 36.83 (pH 7) and 49.18% (pH 10) by mass using XPS analysis. With the assistance of oleylamine, the resultant RGO-Pt hybrid materials were soluble in the nonpolar organic solvents, and the dispersion could remain stable for several months.

No MeSH data available.