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Author Agustia, Yuda Virgantara ♦ Suyitno ♦ Sutanto, Bayu ♦ Arifin, Zainal
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ABSORPTION SPECTROSCOPY ♦ BENZOIC ACID ♦ CHROMATOGRAPHY ♦ CURCUMIN ♦ EMISSION SPECTROSCOPY ♦ ENERGY LEVELS ♦ EXTRACTION ♦ FOURIER TRANSFORMATION ♦ PH VALUE ♦ PURIFICATION ♦ SOLAR CELLS ♦ ULTRAVIOLET RADIATION ♦ ULTRAVIOLET SPECTRA
Abstract The purpose of this research is to investigate the effect of acidity on the energy level of curcumin dye. The natural dye, curcumin, was synthesized from Curcuma longa L. using a simple extraction technique. The purification of curcumin dye was conducted in a column of chromatography and its characteristics were studied. Next, the purified curcumin dye was added by benzoic acids until various acidities of 3.0, 3.5, 4.0, 4.5, and 5.0. The absorbance spectra and the functionality groups found in the dyes were detected by ultraviolet-visible spectroscopy and Fourier-transform infrared spectroscopy, respectively. Meanwhile, the energy level of the dyes, E{sub HOMO} and E{sub LUMO} was measured by cyclic voltammetry. The best energy level of curcumin dye was achieved at pH 3.5 where E{sub red} = −0.37V, E{sub LUMO} = −4.28 eV, E{sub ox} = 1.15V, E{sub HOMO} = −5.83 eV, and E{sub band} {sub gap} = 1.55 eV. Therefore, the purified curcumin dye added by benzoic acid was promising for sensitizing the dye-sensitized solar cells.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-29
Publisher Place United States
Volume Number 1717
Issue Number 1


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