Titania produced from Ti-salt flocculated sludge: photocatalytic activity under solar light.
In this study, titania photocatalyst was produced from the wastewater sludge of Ti-salt flocculation. The high photocatalytic activity of titania reported was evaluated based on a single organic substrate. However, the photocatalytic activity is a substrate-specific; one photocatalyst showed different photocatalytic degradation rates for different substrates. Thus, to investigate the substrate-specific photocatalytic activity of titania, various substrates of humic acid (HA), dichloroacetic acid (DCA), rhodamine B (RhB), metsulfuron methyl (M&M) and phenol were used under simulated solar light irradiation. Results showed titania had a high activity rate for RhB, moderate activity for HA and DCA and low activity for M&M and phenol indicating substrate-specific activities. When compared with Degussa-P25, titania showed higher activity for M&M, while the opposite was observed for HA and phenol. The specific-substrate behaviour of titania could depend on specific physicochemical and electronic interactions between titania, substrates, and their intermediates compounds formed.
Ho Kyong
HK
Shon
Yousef
Y
Okour
Se Min
SM
Park
Jong Beom
JB
Kim
Jong-Ho
JH
Kim
D002384:Catalysis; D005427:Flocculation; D010777:Photochemistry; D012722:Sewage; D013472:Sunlight; D014025:Titanium / Q000737:chemistry*
D012722:Sewage; D014025:Titanium