Kinetic study on the photo-catalytic degradation of pyridine in TiO2 suspension systems

Study of the photocatalytic degradation of methylene blue dye using titanium-doped hydroxyapatite

“…This masks part of the sensitive surface and consequently, degradation efficiency is reduced. A similar phenomenon has also been reported by other authors such as Chen et al 35 , and Zhao et al 36 . At high concentrations of the photocatalyst, the aggregation of particles can occur and may cause a decrease in the number of surface active sites 37 .…”

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

“…These initial results indicate that the degradation rate increases with the initial concentration. The shape of the curves is similar to that obtained in the kinetic model of Langmuir-Hinshelwood (L-H) [27] and expression of the initial rate of which is given by the following equation:…”

“…The calculated value of K and k were 0.037 l/mg and 1.74 mg/l.min, respectively. Such a Langmuir-Hinshelwood type relationship between the initial degradation rate and the concentration, has been also reported by other au- thors [27] [28]. This type of reaction kinetics suggests that the adsorption plays a key role in the photocatalytic degradation mechanism.…”

“…It is well known that pH value has an influence on the kinetic of degradation of some organic compounds in photocatalytic processes [27]- [29]. Therefore, the degradation of the pollutant was studied at different pH values (in the range 3 -11.5).…”

Photocatalytic Degradation of Synthetic Textile Effluent by Modified Sol-Gel, Synthesized Mobilized and Immobilized TiO2, and Ag-doped TiO2

“…This is attributed to the fact that pH not only determines chemical properties of the photocatalyst, but also influences adsorption behaviour of the pollutants [49][50]. It plays an important role in the photocatalytic reaction on the catalyst surfaces, where it affects the surface charge properties of the photocatalyst.…”