Catalytic activities
Catalytic activities of the various photoactive materials, including TiO2, TiO2/PPy, and the various
TiO2/(TiO2–V2O5)/PPy nanocomposites were evaluated by monitoring the degradation of methylene
blue (MB) solution, using a photo-reactor with the distance between lamp and sample of about
10 cm. The tests were carried out under various illumination conditions, i.e. UV light (15W Philips
UV lamp, visible light (15W Philips fluorescent lamp) and in the dark. In a typical experiment, the
0.05 g of TiO2/(TiO2–V2O5)/PPy nanocomposites was suspended into 50 mL of 105 M methylene blue
solution and sonicated for 30 min. Then the suspension was stirred in dark, at room temperature, for
30 min until an adsorption–desorption equilibrium was reached. After irradiation, 10 mL of the suspension
was taken every 30 min during the irradiation until the total illuminating time of 6 h was
reached. All of the sampling suspensions were centrifuged and the concentration of the solution
was determined by measuring the absorbance of methylene blue with a Genesys 10s UV–Vis spectrometer
at wavelength of 664 nm. After that, the sampling solution was refilled into the reaction flask
again and the irradiation was continued. The degradation was evaluated in term of C/C0, where C0 and
C are the concentration of MB before and after irradiation, respectively
Catalytic activities
Catalytic activities of the various photoactive materials, including TiO2, TiO2/PPy, and the various
TiO2/(TiO2–V2O5)/PPy nanocomposites were evaluated by monitoring the degradation of methylene
blue (MB) solution, using a photo-reactor with the distance between lamp and sample of about
10 cm. The tests were carried out under various illumination conditions, i.e. UV light (15W Philips
UV lamp, visible light (15W Philips fluorescent lamp) and in the dark. In a typical experiment, the
0.05 g of TiO2/(TiO2–V2O5)/PPy nanocomposites was suspended into 50 mL of 105 M methylene blue
solution and sonicated for 30 min. Then the suspension was stirred in dark, at room temperature, for
30 min until an adsorption–desorption equilibrium was reached. After irradiation, 10 mL of the suspension
was taken every 30 min during the irradiation until the total illuminating time of 6 h was
reached. All of the sampling suspensions were centrifuged and the concentration of the solution
was determined by measuring the absorbance of methylene blue with a Genesys 10s UV–Vis spectrometer
at wavelength of 664 nm. After that, the sampling solution was refilled into the reaction flask
again and the irradiation was continued. The degradation was evaluated in term of C/C0, where C0 and
C are the concentration of MB before and after irradiation, respectively
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