KINETICS OF PHOTOCATALYTIC DEGRADATION OF REACTIVE YELLOW 17 DYE IN AQUEOUS SOLUTION USING UV IRRADIATION

2001 ◽  
Vol 36 (2) ◽  
pp. 203-213 ◽  
Author(s):  
B. Neppolian ◽  
S. Sakthivel ◽  
Banumathi Arabindoo ◽  
M. Palanichamy ◽  
V. Murugesan
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Degradation ◽  
Uv Irradiation ◽  
Kinetics Of

scholarly journals Kinetics of atrazine degradation by photocatalytic process in aqueous solution

2003 ◽  
Vol 5 (2) ◽  
pp. 87-93 ◽  
Author(s):  
O. Zahraa ◽  
L. Sauvanaud ◽  
G. Hamard ◽  
M. Bouchy
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Salicylic Acid ◽  
Photocatalytic Degradation ◽  
Competitive Adsorption ◽  
Initial Time ◽  
Photocatalytic Process ◽  
Herbicide Atrazine ◽  
Kinetics Of ◽  
Atrazine Degradation

The photocatalytic degradation of the herbicide atrazine has been studied using suspended titanium dioxide as catalyst. The Langmuir-Hinshelwood model is satisfactorily obeyed at initial time and in the course of the reaction. The rate of degradation is found to be enhanced by the addition of persulphate ions. Competitive degradation between atrazine and other pollutants is satisfactorily interpreted as monitored by a competitive adsorption of the reactants. As a consequence, efficient reactants such as salicylic acid and phenol delay atrazine degradation until these compounds are degraded.

Effect of Samarium on the Photocatalytic Property of Sm-TiO2/CNFs Composites

2009 ◽  
Vol 79-82 ◽  
pp. 541-544 ◽  
Author(s):  
Li Ying Zhu ◽  
Xiao Ping Yang ◽  
Dong Hua Teng ◽  
Yun Hua Yu
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Tio2 Nanoparticles ◽  
Carbon Nanofibers ◽  
Uv Irradiation ◽  
Photocatalytic Property ◽  
Uniform Size ◽  
Degradation Of Methyl Orange

Composites of Sm doped TiO2 nanoparticles dispersed on carbon nanofibers (Sm-TiO2/CNFs) with different Sm contents were prepared by preoxidation, hydrolyzation and calcination of Sm-TiO2 precursor/PAN nanofibers. The characterizations of SEM, EDX, XPS and XRD showed that the CNFs surface was loaded by Sm-TiO2 nanoparticles with a uniform size of about 10nm, existing as anatase. It was concluded from XPS results that Ti element exist as Ti4+ and Sm doping increased the content of absorbed oxygen in composites. The effect of Sm doping on the photocatalytic activity of the Sm-TiO2/CNFs composite was investigated by the photocatalytic degradation of methyl orange aqueous solution under UV irradiation. It was found that Sm doping could improve the photocatalytic property of Sm-TiO2/CNFs effectively compared with the undoped specimen, and the photocatalytic activity of the Sm-TiO2/CNFs samples enhanced firstly and then reduced with Sm content increasing.

scholarly journals Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI)

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Yan Ma ◽  
Kejia Zhang ◽  
Cong Li ◽  
Tuqiao Zhang ◽  
Naiyun Gao
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Degradation ◽  
Conduction Band ◽  
Uv Irradiation ◽  
Photocatalytic Oxidation ◽  
Ph Value ◽  
Electron Acceptors ◽  
Potassium Ferrate ◽  
The Stability ◽  
Complete Mineralization

The photocatalytic degradation of sulfonamides in aqueous TiO2suspension under UV irradiation has been investigated using potassium ferrate as electron acceptors. The results showed that the stability of Fe(VI) is dependent on pH significantly, and the stability reduces obviously in the presence of UV-TiO2. The experiments indicated that Fe(VI) could effectively scavenge the conduction band electrons from the surface of TiO2. The photocatalytic oxidation of sulfonamides with Fe(VI) was found to be much faster than that without Fe(VI). The SD, SM, and SMX concentration was greatly reduced by 89.2%, 83.4%, and 82.0%, respectively, after 10 min with UV-TiO2-Fe(VI), comparing to 65.2%, 66.0%, and 71.9%, respectively, with Fe(VI) only in the dark and 71.3%, 72.7%, and 76.0%, respectively, with UV-TiO2. The pH value of solution significantly influenced the sulfonamides degradation in UV-TiO2-Fe(VI) system. The degradation amount of sulfonamides after 10 min was a maximum at pH 7. The intermediate products of sulfonamides oxidation by UV-TiO2-Fe(VI) were analysed by LC-HESI-MS-MS and the results suggested that a majority of sulfonamides turned into large-molecule products without complete mineralization.

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