Photocatalytic efficiency of titania photocatalysts in saline waters
The photocatalytic efficiency of the recently synthesized TiO2 powder, named P160, of the degradation of dye Dye C.I. Reactive orange 16 in natural and artificial seawater was investigated in comparison to its efficiency in deionized water and the efficiency of a standard TiO2 powder Degusa...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Serbian Chemical Society
2014-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2014/0352-51391400020A.pdf |
| Summary: | The photocatalytic efficiency of the recently synthesized TiO2 powder, named
P160, of the degradation of dye Dye C.I. Reactive orange 16 in natural and
artificial seawater was investigated in comparison to its efficiency in
deionized water and the efficiency of a standard TiO2 powder Degusa P25. It
was shown that the photocatalytic efficiency of P160 was slightly higher
than that of P25, probably due to slightly higher specific surface area,
higher pore volume and larger pores of the powder P160. The efficiency of
both photocatalysts in natural and artificial seawater was significantly
lower than that in deionized water. The overall rate of dye degradation for
both types of photocatalysts is litle higher in artificial seawater than in
natural seawater, which shows the influence of organic compounds naturally
present in seawater on the photocatalysts activity. A saturation
Langmuir-type relationship between the initial degradation rate and the
initial dye concentration indicates that the adsorption plays a role in the
photocatalytic reaction. The photodegradation rate constant k, which
represents the maximum reaction rate, has similar values for P25 and P160 in
all types of water due to the similar properties of the photocatalysts.
[Projekat Ministarstva nauke Republike Srbije, br III 45019] |
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| ISSN: | 0352-5139 1820-7421 |