Photocatalytic Degradation of an Odorous Pollutant:  2-Mercaptobenzothiazole in Aqueous Suspension Using Nd3+−TiO2Catalysts

2006 ◽  
Vol 45 (1) ◽  
pp. 1-7 ◽  
Author(s):  
F. B. Li ◽  
X. Z. Li ◽  
K. H. Ng
Keyword(s):  
Photocatalytic Degradation ◽  
Aqueous Suspension

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.

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).

Photocatalytic degradation of pesticide–acaricide formetanate in aqueous suspension of TiO2

2001 ◽  
Vol 34 (3) ◽  
pp. 241-252 ◽  
Author(s):  
Alberto Marinas ◽  
Chantal Guillard ◽  
José M. Marinas ◽  
Amadeo Fernández-Alba ◽  
Ana Aguëra ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Aqueous Suspension

Photocatalytic degradation of commercial methyl parathion in aqueous suspension containing La‐doped TiO2nanoparticles

2011 ◽  
Vol 32 (13) ◽  
pp. 1515-1522 ◽  
Author(s):  
Hao Chen ◽  
Min Shen ◽  
Ruiwen Chen ◽  
Ke Dai ◽  
Tianyou Peng
Keyword(s):  
Photocatalytic Degradation ◽  
Methyl Parathion ◽  
Aqueous Suspension ◽  
La Doped

Fe 3 O 4 @HAP-enhanced photocatalytic degradation of Acid Red73 in aqueous suspension: Optimization, kinetic, and mechanism studies

2017 ◽  
Vol 91 ◽  
pp. 59-67 ◽  
Author(s):  
Masoumeh Golshan ◽  
Mohammadreza Zare ◽  
Gholamreza Goudarzi ◽  
Mehrnoosh Abtahi ◽  
Ali Akbar Babaei
Keyword(s):  
Photocatalytic Degradation ◽  
Aqueous Suspension
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