Photoluminescence of Reduced Graphene Oxide Prepared from Old Coconut Shell with Carbonization Process at Varying Temperatures

3rd International Conference on Functional Materials Science 2016

Jayanti, Dwi Noor^1 ; Nugraheni, Ananda Yogi^1 ; Kurniasari^1 ; Baqiya, Malik Anjelh^1 ; Darminto^1

Advanced Materials Research Group, Department of Physics, Faculty of Mathematics and Natural Science, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo, Surabaya

60111, Indonesia^1

关键词: Carbonization process;    Coconut shells;    Distilled water;    Photoluminescence intensities;    Reduced graphene oxides;    Reduced graphene oxides (RGO);    Varying temperature;    Visible region;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/196/1/012005/pdf
DOI  :  10.1088/1757-899X/196/1/012005

来源: IOP

【 摘 要 】

Reduced graphene oxide (rGO) powder has been prepared from coconut shells by carbonization process at 400°C, 600°C, 800°C and 1000°C for 5 hours at ambient air. In this study the exfoliation rGO was added into distilled water with variation of concentration solution using the sonication process for 3 hours and centrifugation at 4000 rpm for 20 minutes. The characterization were performed by using XRD and photoluminescence (PL) spectroscopy. The photoluminescence or rGO showed the peak of excitation and emission at wavelengths ranging from 340 nm to 800 nm. The PL emission spectra are at wavelength ranging from UV to visible region approaching red. Observation showed that the photoluminescence intensity was significantly increased by the increasing content of rGO in the solution. The influence of the varying temperature on the PL spectra will also be discussed in this study.