A study of photocatalytic degradation of textile dye CI basic yellow 28 in water using P160 TiO2 based catalyst

Abstract

The photocatalytic degradation of synthetic textile dye CI Basic Yellow 28 (BY28) in water, using recently synthesized P160 TiO2 based catalyst, under Osram ultra-vitalux® lamp (300 W) light, was studied. The effect of the operational parameters such as initial concentration of catalyst, initial dye concentration and pH was studied. Salt effect was also investigated (NaCl, Na2CO3, Na2SO4, NaNO3). It was found that the optimal concentration of catalyst is 2.0 g L-1. A pseudo first-order kinetic model was illustrated using the Langmuir-Hinshelwood mechanism, and the adsorption equilibrium constant and the rate constant of the surface reaction were calculated (KBY = 6.126 L mg-1 and kC = 0.272 mg L-1 min-1, respectively). The photodegradation rate was higher in weak acidic than in high acidic and alkaline conditions. The presence of CO32- ions increases the photodegradation rate while Cl-, SO42- and NO3-ions decreases the reaction rate. The rate of photodegradation of BY28 was measured using UV-Vis spectroscopy. [Projekat Ministarstva nauke Republike Srbije, br. III 45019 and br. 172013.

Photocatalytic Activity of Ag-TiO2 Composites Deposited by Photoreduction under UV Irradiation

“…Figure 6 shows the C t /C o (methylene blue) as a function of time under UV irradiation, in the presence of TiO 2 and Ag-TiO 2 thin films for 180 min. Figure 6 shows similar profile to behavior observed for the photocatalytic degradation of different dyes; previous studies showed that photocatalytic degradation rate of textile dyes in heterogeneous photocatalytic oxidation systems under UV light illumination followed Langmuir-Hinshelwood (L-H); the Langmuir-Hinshelwood expression that explains the kinetics of heterogeneous catalytic systems is given by [38][39][40][41][42][43][44]…”

Photocatalytic Degradation of Dyes: An Overview

“…The purpose is to analyse some of the consequences of treating the kinetic data on the removal of pollutants and other organic species especially under photo-catalytic conditions generally under First order kinetic equation. The first order kinetic equation employed in such circumstances [179] can be written as − ln( 0 ⁄ ) = ; where C is the concentration at any time t seconds, and C0 is the initial concnetration of the dye, and k is the value of the rate constant, this rate constant may be a lumped parameter including the value of the intrinsic rate constant, adsorption equilibrium constant and so on. Typical kinetic data analysed according to first order kinetic equation of the photo catalytic decomposition of Rhodamine B from ref 15 is given as an example.…”

Factors Influencing the Photocatalytic Degradation of Reactive Yellow 145 by TiO<sub>2</sub>-Coated Non-Woven Fibers

“…The photocatalytic degradation of dyes is also performed in the presence of inorganic anions [35] [36]. They are generally present in industrial discharges with values depending on the nature of the effluent.…”