Adsorption and photocatalysis of nanocrystalline TiO2 particles for Reactive Red 195 removal: effect of humic acids, anions and scavengers
Jazyk angličtina Země Německo Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
26054457
DOI
10.1007/s11356-015-4806-y
PII: 10.1007/s11356-015-4806-y
Knihovny.cz E-zdroje
- Klíčová slova
- Azo dyes, Mineralisation, Photocatalysis, RR195, Scavengers, TiO2 nanoparticles,
- MeSH
- adsorpce MeSH
- anionty MeSH
- azosloučeniny izolace a purifikace účinky záření MeSH
- chemické látky znečišťující vodu izolace a purifikace účinky záření MeSH
- čištění vody metody MeSH
- fotolýza MeSH
- huminové látky analýza MeSH
- katalýza MeSH
- koncentrace vodíkových iontů MeSH
- naftalensulfonany izolace a purifikace účinky záření MeSH
- nanočástice chemie MeSH
- scavengery volných radikálů chemie MeSH
- titan chemie MeSH
- ultrafialové záření * MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- anionty MeSH
- azosloučeniny MeSH
- chemické látky znečišťující vodu MeSH
- huminové látky MeSH
- naftalensulfonany MeSH
- reactive red 195 MeSH Prohlížeč
- scavengery volných radikálů MeSH
- titan MeSH
- titanium dioxide MeSH Prohlížeč
In the present study, the coupling of adsorption capacity and photocatalytic efficiency of two different industrially produced titania catalysts was investigated and compared. The azo dye Reactive Red 195 was selected as a model compound. The tested catalysts, PK-10 and PK-180, exhibited different adsorption capacities due to their significant difference in their specific surface, but both have proven to be effective photocatalysts for photodegradation of the studied dye. PK-10 exhibited strong adsorption of the studied dye due to its high specific surface area, while the second studied catalyst, PK-180, demonstrated negligible adsorption of Reactive Red 195. The effect of the pH, the concentration of the catalyst and the initial concentration of the dye appear to affect the photocatalytic rate. The effect of the presence of humic acids and inorganic ions was also examined, while the contribution of various reactive species was indirectly evaluated through the addition of various scavengers. To evaluate the extent of mineralisation of the studied dye, total organic carbon (TOC) measurements during the experiment were also conducted. Besides total colour removal, evident reduction of TOC was also achieved using both catalysts.
Department of Chemistry Aristotle University of Thessaloniki Thessaloniki Greece
Department of Physical Chemistry Palacký University Olomouc Czech Republic
Precheza a s Dr Edvarda Beneše Přerov Czech Republic
Regional Centre of Advanced Technologies and Materials Palacký University Olomouc Czech Republic
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