STUDI FOTOLUMINESENSI LARUTAN GRAFENA OKSIDA TEREDUKSI DISINTESIS DARI TEMPURUNG KELAPA

JAYANTI, DWI NOOR (2017) STUDI FOTOLUMINESENSI LARUTAN GRAFENA OKSIDA TEREDUKSI DISINTESIS DARI TEMPURUNG KELAPA. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian tentang “Studi Fotoluminesensi Larutan Grafena Oksida Tereduksi Disintesis dari Tempurung Kelapa” telah dilakukan dengan memanfaatkan bahan dasar tempurung kelapa. Penelitian ini bertujuan untuk mengetahui pengaruh dari temperatur dan konsentrasi larutan melalui proses penyayatan rGO dari hasil analisis fotoluminesensi. Pada penelitian ini digunakan variasi temperatur sebesar 400oC, 600oC, 800oC, dan 1000oC dengan waktu penahanan (holding time) 5 jam pada udara bebas. Serbuk arang tempurung kelapa hasil karbonisasi dilarutkan ke dalam aqua DM dengan variasi kosentrasi larutan 0,001 mg/ml, 0,002 mgl/ml, dan 0,003 mg/ml. Kemudian dilanjutkan dengan proses ultrasonikasi selama 3 jam dan proses sentrifugasi selama 20 menit (4000 rpm). Karakterisasi dilakukan dengan menggunakan XRD (X-Ray Diffraction) dan spektroskopi fotoluminesensi guna mengetahui sifat optik dari rGO. Dari hasil analisis XRD ditunjukkan bahwa terbentuk fasa grafena oksida tereduksi (rGO) pada sudut difraksi 2θ~24o pada temperatur 400oC. Berdasarkan hasil fotoluminesensi menunjukkan bahwa intensitas fotoluminesensi secara signifikan mengalami peningkatan seiring bertambahnya konsentrasi larutan. Pengaruh variasi temperatur pada larutan rGO dari hasil fotoluminesensi mengalami pergeseran puncak menuju panjang gelombang yang lebih kecil seiring dengan kenaikan temperatur.
===================================================================================================== “Photoluminescence Study of Reduced Graphene Oxide Synthesized from Coconut Shell” has been carried out by utilizing the waste raw materials of old coconut shell. The purpose of this work is to determine the effect of temperature and concentration of solution through exfoliation process from photoluminescence analysis results. The main materials used in this study is coconut shell. This research used a variation of temperatures at 400oC, 600oC, 800oC, 1000oC for 5 hours in ambient air. In this study the exfoliation rGO was performed in distilled water (aqua DM) with variation of concentration solution 0,001 mg/ml, 0,002 mg/ml, and 0,003 mg/ml using the sonication process for 3 hours and centrifugation for 20 minutes (4000 rpm). The characterization were performed by using XRD (X-Ray Diffraction) and photoluminescence (PL) spectroscopy. The XRD analysis showed that the reduced graphene oxide phase was formed as indicated by diffraction peaks at 2θ~24o from the sample heated at 400oC temperature. Observation showed that the photoluminescence intensity was significantly increased by the increasing content of rGO in the solution. The influence of varying temperatures on the rGO solution causes a shift towards the PL emission peak wavelength which is smaller as the temperature increases.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Fotoluminesensi, grafena oksida tereduksi (rGO), coconut shell, exfoliation
Subjects:	Q Science > QC Physics Q Science > QC Physics > QC475 Photoluminescence
Divisions:	Faculty of Mathematics and Science > Physics > 45101-(S2) Master Thesis
Depositing User:	DWI NOOR JAYANTI
Date Deposited:	27 Jan 2017 04:00
Last Modified:	27 Jan 2017 04:00
URI:	http://repository.its.ac.id/id/eprint/3693

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