Effect of solvents on the extraction of natural pigments and adsorption onto TiO2 for dye-sensitized solar cell applications

被引：91
作者：
Al-Alwani, Mahmoud A. M. [1 ,3 ]
Mohamad, Abu Bakar [1 ]
Kadhum, Abd. Amir H. [1 ]
Ludin, Norasikin A. [2 ]
机构：
[1] Univ Kebangsaan Malaysia, Fac Engn & Built Environm, Dept Chem & Proc Engn, Bangi 43600, Selangor, Malaysia
[2] Univ Kebangsaan Malaysia, Solar Energy Res Inst, Bangi 43600, Selangor, Malaysia
[3] Univ Baghdad, Coll Educ Pure Sci Ibn Al Haitham, Dept Biol, Baghdad, Iraq
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 138卷
关键词：
Dye-sensitized solar cell; Natural pigments; Solvents; Chlorophyll; Betanin; Betaxanthins; CONVERSION EFFICIENCY; NANOCRYSTALLINE TIO2; GEL TECHNIQUE; LOW-COST; BETALAINS; NANOPARTICLES; ANTHOCYANINS; PERFORMANCE; FLOWERS; FRUITS;
D O I：
10.1016/j.saa.2014.11.018
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Nine solvents, namely, n-hexane, ethanol, acetonitrile, chloroform, ethyl-ether, ethyl-acetate, petroleum ether, n-butyl alcohol, and methanol were used to extract natural dyes from Cordyline fruticosa, Pandannus amtnyllifolius and Hylocereus polyrhizus. To improve the adsorption of dyes onto the TiO2 particles, betalain and chlorophyll dyes were mixed with methanol or ethanol and water at various ratios. The adsorption of the dyes mixed with titanium dioxide (TiO2) was also observed. The highest adsorption of the C fruticosa dye mixed with TiO2 was achieved at ratio 3:1 of methanol: water. The highest adsorption of P. amaryllifolius dye mixed with TiO2 was observed at 2:1 of ethanol: water. H. polyrhizus dye extracted by water and mixed with TiO2 demonstrated the highest adsorption among the solvents. All extracted dye was adsorbed onto the surface of TiO2 based on Fourier Transform Infrared Spectroscopy (FTIR) analysis. The inhibition of crystallinity of TiO2 was likewise investigated by X-ray analysis. The morphological properties and composition of dyes were analyzed via SEM and EDX. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：130 / 137
页数：8
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