Investigation on photoluminescence emission of (reduced) graphene oxide paper

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Ding, J.J.^1 ; Chen, H.X.^1 ; Feng, D.Q.^1 ; Fu, H.W.^1

College of Science, Xian Shiyou University, Xian, Shaanxi

710065, China^1

关键词: Absorbance spectrum;    Graphene oxide papers;    Localized state;    Photoluminescence emission;    Photoluminescence spectrum;    Reduced graphene oxides (RGO);    Scanning electron microscopy image;    Vacuum filtration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012097/pdf
DOI  :  10.1088/1757-899X/292/1/012097

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to contrastively investigate optical properties of graphene oxide (GO) and reduced graphene oxide (rGO) paper, GO is prepared by improved Hummer method and controlled reduced using hydration hydrazine to obtain good dispersive rGO in organic solvent. Finally, GO and rGO paper are obtained by vacuum filtration method. Samples morphology and optical properties are analyzed by scanning electron microscopy (SEM) images, Raman spectra, absorbance spectra and photoluminescence (PL) spectra. Results indicate that there are large numbers of localized states in both GO and rGO paper, and optical gaps of two samples are 0.62 eV. In PL spectra of GO paper, we observe three emission peaks at 565, 578 and 608 nm, respectively whose intensity decreases evidently after reduced, which is due to the decrease of oxide functionalized groups and expansion of sp2clusters. PL emission will gradually decrease during GO are reduced.