Physicochemical study of synthetic dyes adsorption on TiO2 thin films for dye sensitized solar cells

Author

William Vallejo;Carlos D?az-Uribe;Karen Navarro;Catalina Fajardo;Johann Hernandez;Carlos Arredondo

Author_Institution

Grupo de Investigaci?n en Fotoqu?mica y Fotobiolog?a - Facultad de Ciencias B?sicas, Universidad del Atl?ntico. Km 7 Antigua V?a Puerto Colombia, Barranquilla, Colombia, 80001

fYear

2015

fDate

6/1/2015 12:00:00 AM

Firstpage

1

Lastpage

4

Abstract

In this work we study equilibrium and kinetic adsorption process of Methylene Blue (MB) and Copper phthalocyanine (CuPhTh) dyes on TiO₂ thin films. We synthesized phthalocyanines through Achar method; dyes were characterized by Fourier-Transform Infrared spectroscopy (FTIR) and Diffuse reflectance. TiO₂ thin films were fabricated by Doctor Blade method for using Degussa P25 as TiO₂ source. We used Langmuir and Freundlich adsorption models to describe adsorption equilibrium, and besides, we used Largergren model to describe kinetic adsorption process. Characterization results reveal typical signals of phthalocyaninaes, and besides, TiO₂ thin films had a polycrystalline structure. Results indicated dyes adsorption to occur through chemisorption process and Langmuir adsorption model describes suitably dye adsorption process on TiO₂ thin films.

Keywords

"Adsorption","Films","Kinetic theory","Data models","Photovoltaic cells","Decision support systems","Mathematical model"

Publisher

ieee

Conference_Titel

Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd

Type

conf

DOI

10.1109/PVSC.2015.7356083

Filename

7356083