A Facile Method to Synthesize CdSe-Reduced Graphene Oxide Composite with Good Dispersion and High Nonlinear Optical Properties

CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2019-06, Vol.9 (7), p.957
Main Authors: Li, Pengchao, Zhu, Baohua, Li, Peng, Zhang, Zhihao, Li, Luyao, Gu, Yuzong
Format: Article
Language:English
Subjects:
Cadmium selenides
Carbon
carboxyl groups
CdSe/RGO nanocomposites
Chemical research
Composite materials
Dispersion
Electron microscopy
Functional groups
good dispersion
Graphene
Graphite
Hydrochloric acid
II-VI semiconductors
Infrared spectra
Mass ratios
Morphology
Nanocomposites
Nanocrystals
Nanoparticles
Nonlinear optics
Optical properties
Photocatalysis
Photon absorption
Photonics
Potassium
Quantum dots
Raman spectra
Raman spectroscopy
Scanning electron microscopy
Sodium
Synthesis
third-order nonlinear optical property
Transmission electron microscopy
X-ray diffraction
Z-scan technique
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Summary:CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesis of CdSe/RGO complexes was successfully demonstrated by Fourier infrared (FT-IR) and Raman spectra. CdSe nanoparticles in the CdSe/RGO composite were uniformly dispersed on the graphene surface. The study found that oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) groups in graphene played a decisive role in the dispersion of CdSe. The third-order nonlinear optical properties of CdSe/RGO composites were measured by a single beam Z-scan technique. The experimental results showed that composites exhibited two-photon absorption and self-focusing nonlinear refraction properties. Additionally, the third-order nonlinear susceptibility of the composite material was obviously enhanced, which was mainly due to the good dispersion of CdSe nanoparticles on graphene.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano9070957