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- W1969245841 abstract "Visible-light activated titanium dioxide photocatalysts were prepared by hydrolysis of titanium (IV) isopropoxide with thioacetamide or thiourea, followed by calcinations at 450 °C. The experiments demonstrated that phenol and 4-chlorophenol in aqueous solutions were successfully degraded under visible light (λ > 400 nm) using doped TiO2. The major effort was aimed at evaluation of the effect of thioacetamide and thiourea amount (from 0.5 to 5 wt%) used during synthesis on the photodegradation efficiency. It was found that thioacetamide and thiourea dosage of 5% in doped TiO2 resulted in the most pronounced photocatalytic activity––phenol was photooxided in 93 and 97% within 60 min, respectively. Gradual loss of photoactivity was observed due to ageing of modified TiO2––even 70% after six months of storage. The catalyst powder was characterized by X-ray diffraction (XRD), X-ray photoelectron emission spectroscopy (XPS) and UV–vis absorption measurements. For TiO2 modified with thiourea, light absorption in the visible region gradually increased with the increasing dopant content." @default.
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- W1969245841 date "2007-10-01" @default.
- W1969245841 modified "2023-09-27" @default.
- W1969245841 title "Thioacetamide and thiourea impact on visible light activity of TiO2" @default.
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- W1969245841 doi "https://doi.org/10.1016/j.apcatb.2007.05.005" @default.
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