DFT study on the reaction mechanisms behind the catalytic oxidation of benzyl alcohol into benzaldehyde by O2 over anatase TiO2 surfaces with hydroxyl groups: Role of visible-light irradiation

A new functional photocatalytic paint was prepared by adding N-doped nanocrystalline anatase TiO2 powders into self-engineered oxidation resistance latex paint system. The property of the UV-Vis light absorbance of the paint was characterized. The effects of the amount, types, and the introducing methods of the TiO2 in the paints on the behavior of the UV absorption, photocatalytic properties of the paint were systematically investigated. UV-Vis absorption spectra reveal that the ultraviolet light can strongly be absorbed by the paints. The absorption edge of the N-doped nanocrystalline anatase powders modified paint has red-shifted to visible light region. The colony counting method is used to study its sterilization performance under visible light irradiation. The sterilization experiments show that the rate of sterilizing staphylococcal bacteria by the N-doped TiO2 modified paint can exceed more than 99% after the paint has been irradiated by the visible light for 2 to 4 hours.

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Role of platinum-like tungsten carbide as cocatalyst of CdS photocatalyst for hydrogen production under visible light irradiation

Applied Catalysis A General ◽

10.1016/j.apcata.2008.05.020 ◽

2008 ◽

Vol 346 (1-2) ◽

pp. 149-154 ◽

Cited By ~ 83

Author(s):

Jum Suk Jang ◽

Dong Jin Ham ◽

Narayanan Lakshminarasimhan ◽

Won yong Choi ◽

Jae Sung Lee

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Tungsten Carbide ◽

Visible Light Irradiation ◽

Light Irradiation

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Visible-Light Activity of N-Doped TiO2 Powders and their Applications

Materials Science Forum ◽

10.4028/www.scientific.net/msf.544-545.167 ◽

2007 ◽

Vol 544-545 ◽

pp. 167-170 ◽

Cited By ~ 2

Author(s):

Wen Bin Cao ◽

Yi Wei ◽

Yan Hong Li ◽

Xiao Ning Zhang

Keyword(s):

Aqueous Solution ◽

Visible Light ◽

Visible Light Irradiation ◽

Guanidine Hydrochloride ◽

Anatase Tio2 ◽

Light Irradiation ◽

Latex Paint ◽

Doped Tio2 ◽

Light Activity ◽

Xrd Patterns

Nitrogen-doped TiO2 has been prepared by calcining technical grade guanidine hydrochloride and commercial anatase TiO2 powders. XRD patterns indicate that the prepared powders are composed of anatase. XPS results show that N atoms have been incorporated into the lattice of anatase. UV-Vis reflectance spectra show that the light absorption of the synthesized N-doped anatase powders has red-shifted well into visible-light region. Degradation of methylene blue (MB) aqueous solution by N-doped anatase has been investigated by UV-Vis light spectrophotometer. The 400-mL 10 mg/L aqueous solution of MB could be degraded with 4 g N-doped TiO2 within 4.5 hrs of visible light irradiation. Photocatalytic paint was prepared by adding the synthesized N-doped nanocrystalline anatase TiO2 powders into self-engineered oxidation resistance latex paint system. The effects of the amount and types of the TiO2 in the paints on the sterilization were systematically investigated. The colony counting method was used to study its sterilization performance under visible light irradiation. The sterilization experiments show that the rate of sterilizing E. coli by the N-doped TiO2 modified paint can exceed more than 99% after irradiation by the visible light for 2 to 4 hours.

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