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

被引:24
|
作者
Li, Pengchao [1 ]
Zhu, Baohua [1 ]
Li, Peng [1 ]
Zhang, Zhihao [1 ]
Li, Luyao [1 ]
Gu, Yuzong [1 ]
机构
[1] Henan Univ, Sch Phys & Elect, Inst Micro Nano Photon Mat & Applicat, Kaifeng 475004, Peoples R China
来源
NANOMATERIALS | 2019年 / 9卷 / 07期
基金
中国国家自然科学基金;
关键词
CdSe; RGO nanocomposites; carboxyl groups; third-order nonlinear optical property; Z-scan technique; good dispersion; QUANTUM DOTS; SELECTIVE SYNTHESIS; NANOCOMPOSITES;
D O I
10.3390/nano9070957
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
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页数:13
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