The influence of selected parameters on the photocatalytic degradation of azo-dyes in the presence of TiO2 aqueous suspension

2008 ◽  
Vol 145 (2) ◽  
pp. 242-248 ◽  
Author(s):  
Wojciech Baran ◽  
Ewa Adamek ◽  
Andrzej Makowski
Keyword(s):  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Aqueous Suspension

Azo-dyes photocatalytic degradation in aqueous suspension of TiO2 under solar irradiation

Chemosphere ◽  
2002 ◽  
Vol 49 (10) ◽  
pp. 1223-1230 ◽  
Author(s):  
Vincenzo Augugliaro ◽  
Claudio Baiocchi ◽  
Alessandra Bianco Prevot ◽  
Elisa Garcı́a-López ◽  
Vittorio Loddo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Aqueous Suspension ◽  
Solar Irradiation

Photocatalytic Degradation of 4-Chlorophenol by •OH Radicals Generated by Thiophene Oligomers Incorporated in ZSM-5 Zeolite Channels

2003 ◽  
Vol 68 (11) ◽  
pp. 2219-2230 ◽  
Author(s):  
Gabriel Čík ◽  
Milada Hubinová ◽  
František Šeršeň ◽  
Jozef Krištín ◽  
Monika Antošová
Keyword(s):  
Reactive Oxygen Species ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Maleic Acid ◽  
Aqueous Suspension ◽  
Reactive Oxygen ◽  
Spin Trapping ◽  
Oh Radicals ◽  
Oxygen Species ◽  
Trapping Method

Degradation of 4-chlorophenol by reactive oxygen species was studied, the latter being generated by photo-assisted reactions of thiophene oligomers, synthesized in channels of the Na-ZSM-5 zeolite. The photoreaction was carried out in an aqueous suspension of photocatalyst, irradiated with visible light (λ > 400 nm). The spin-trapping method was used to detect the generated •OH radicals. The main products of the photodecomposition of 4-chlorophenol were found to be phenol, hydroquinone and maleic acid.

Facile fabrication of H2BDC-NH2modified anatase TiO2for effective photocatalytic degradation of azo dyes

2016 ◽  
Vol 95 (5) ◽  
pp. 922-930 ◽  
Author(s):  
Meiling Liu ◽  
Yong Liu ◽  
Dou Zhang ◽  
Jun Pan ◽  
Bowei Liu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Facile Fabrication

UV-induced photocatalytic degradation of azo dyes by organic-capped ZnO nanocrystals immobilized onto substrates

2005 ◽  
Vol 60 (1-2) ◽  
pp. 1-11 ◽  
Author(s):  
R. Comparelli ◽  
E. Fanizza ◽  
M.L. Curri ◽  
P.D. Cozzoli ◽  
G. Mascolo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Zno Nanocrystals

scholarly journals Photocatalytic Degradation of Monolinuron and Linuron in an Aqueous Suspension of Titanium Dioxide Under Simulated Solar Irradiation

2007 ◽  
Vol 20 (2) ◽  
pp. 163-172 ◽  
Author(s):  
Razika Zouaghi ◽  
Abdennour Zertal ◽  
Bernard David ◽  
Sylvie Guittonneau
Keyword(s):  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Ph Value ◽  
Degradation Kinetics ◽  
Aqueous Suspension ◽  
Operating Conditions ◽  
Solar Irradiation ◽  
Point Of Zero Charge ◽  
Degradation Rates ◽  
Simulated Solar Irradiation

Abstract The photocatalytic degradation of two phenylurea herbicides, monolinuron (MLN) and linuron (LN), was investigated in an aqueous suspension of TiO2 using simulated solar irradiation. The objective of the study was to compare their photocatalytic reactivity and to assess the influence of various parameters such as initial pesticide concentration, catalyst concentration and photonic flux on the photocatalytic degradation rate of MLN and LN. A comparative study of the photocatalytic degradation kinetics of both herbicides showed that these two compounds have a comparable reactivity with TiO2/simulated sun light. Under the operating conditions of this study, the photocatalytic degradation of MLN and LN followed pseudo first-order decay kinetics. The kobs values indicated an inverse dependence on the initial herbicide concentration and were fitted to the Langmuir-Hinshelwood equation. Photocatalytic degradation rates increased with TiO2 dosage, but overdoses did not necessarily increase the photocatalytic efficiency. The degradation rate of MLN increased with radiant flux until an optimum at 580 W m‑2 was reached and then decreased. Under these conditions, an electron-hole recombination was favored. Finally, the photocatalytic degradation rate depended on pH, where an optimum was found at a pH value close to the pH of the point of zero charge (pH = 6).

A kaolinite/$$\hbox {TiO}_{2}$$/ZnO-based novel ternary composite for photocatalytic degradation of anionic azo dyes

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
A K M Maksudul Hasan ◽  
Shaikat Chandra Dey ◽  
Muhammad Mominur Rahman ◽  
Abdullah Muhammad Zakaria ◽  
Mithun Sarker ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Ternary Composite
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