Immobilized TiO2-Polyethylene Glycol: Effects of Aeration and pH of Methylene Blue Dye

Abstract

Abstract:Immobilized TiO 2 and immobilized TiO 2 -polyethylene glycol (TiO 2 /PEG) films have been prepared via brush coating method. The formulation of immobilized TiO 2 film was prepared by mixing distilled water with P25, while the formulation containing P25 combined with 8% PEG in distilled water was used in preparing immobilized TiO 2 /PEG. A double sided adhesive tape (DSAT) was stacked onto a glass surface prior to coating with the formulations and annealing by a thermal treatment at 100 • C for 15 min. The photocatalytic activity of immobilized photocatalysts was evaluated under photodegradation of methylene blue (MB). It was observed that immobilized TiO 2 /PEG has showed a higher rate of photocatalytic activity compared to immobilize TiO 2 . The X-ray photoelectron spectroscopy and Fourier transform infrared (FT-IR) spectra of immobilized TiO 2 /PEG sample proved that the existence of C=O led to enhanced photoactivity efficiency under normal light and visible light irradiations. The photocatalytic activity performance of immobilized TiO 2 /PEG was the highest at 75 mL·min −1 aeration rate and pH 11 of MB dye. The correlation between of all these parameters was investigated in this study.

Immobilized TiO2 on glass spheres applied to heterogeneous photocatalysis: photoactivity, leaching and regeneration process

“…A simple approach to catalyst’s immobilization on glass sphere is presented. It employed a suspended nanocrystaline TiO 2 -P25 powder in alcohol and acid medium, with the improved photocatalytic activity by polyethylene glycol (PEG) solution ( Miranda-García et al, 2011 ; Nawawi et al, 2017 ). The leaching and regeneration capacity of the immobilized TiO 2 were evaluated in specially designed tests.…”

Treatment of Batik Industry Waste with a Combination of Electrocoagulation and Photocatalysis

“…The oxygen took on the role of electron scavenger so that the recombination rate in the photocatalysis could be reduced. The phenomenon also caused an increase in the OH groups ( ⦁) that resulted from the reaction process between the oxygen and the electrons (Nawawi et al, 2017). As the number of OH groups ( ⦁) increased, the number of pollutants that could be attacked by the OH group ( ⦁) increased.…”

Catalyst Deactivation During Photocatalytic Degradation of Methylene Blue with TiO2

“…Bei genügend großer Oberflächenladung (pH > 10) nimmt die Reaktionsgeschwindigkeit jedoch wieder ab . Das hängt damit zusammen, dass dort die Adsorption an den Katalysator so stark begünstigt ist, dass die Annahme K MB c MB << 1 nicht mehr gilt und der Nenner von Gl.…”