Photocatalytic Removal of Food Colorant E 131 VF from synthetic wastewater by Cu Doped TiO2 Samples

Journal of Water and Environmental Nanotechnology

ARTICLE

El Tfayli, Malak Ali¹  Ali Makki, Fatima¹  Mustapha Kassir, Mounir¹  El Jamal, Mouhiaddine Mohamed¹  Ebrahimian Pirbazari, Azadeh² 

[1] Chemistry Department, Lebanese University, Rafic Hariri Campus. El Hadath;Faculty of Fouman, College of Engineering, University of Tehran

关键词: Cu/ TiO2;    Photocatalytic removal;    Surfactant;    E 131 VF dye;    Kinetics study;   

DOI  :  10.22090/jwent.2019.03.002

学科分类：数学（综合）

来源: Iranian Environmental Mutagen Society

【 摘 要 】

In this work, we studied the effect of various amounts (0.2-1.2 % mole ratio) of Cu doping to TiO2 nanoparticles (Cu/TiO2 ) on the photocatalytic removal efficiency of the food colorant E 131 VF. Two series of doped TiO2 (P25) photocatalysts were prepared in two different media (50%ethanol-50%acetone and 5% surfactant (Tween 20)-95%H2 O) by using the impregnation method. The prepared samples were characterized by XRD, FTIR, Raman, diffuse reflectance spectroscopy and SEM/EDX analyses. The XRD results showed that the crystal dimension of TiO2 increased from 23 to 35 nm and rutile/anatase ratio decreased from 16% to 9% after Cu doping in two different media. The photoactivity of TiO2 was reduced in the presence of Cu even at a low molar ratio. The photocatalytic degradation rate constant of TiO2 (P25) was 0.24 (au) but it decreased to 0.015 (au) in the presence of the sample containing 0.6% Cu. Several reasons were suggested to explain the dramatic decrease in the activity of the prepared Cu/TiO2 samples.

【 授权许可】

CC BY