Author/Authors :
PARK, Jongee Atılım Üniversitesi - Mühendislik Fakültesi - Metalurji ve Malzeme Mühendisliği Bölümü, Turkey , ÖZTÜRK, Abdullah Orta Doğu Teknik Üniversitesi - Mühendislik Fakültesi - Metalurji ve Malzeme Mühendisliği Bölümü, Turkey
Abstract :
Silver (Ag) was loaded to three different kinds of TiO2 powders (P25, NT-22, and TiO(OH)2) through adding three different quantities (4.6, 9.2, and 13.8 ml) of AgNO3 solution and milling 1hour in a planetary ball mill. Photocatalytic activity of as-received, only milled, and Ag loaded TiO2 powders was determined in terms of the decomposition of methyl orange (MO) solution under UV light irradiation. X-Ray diffraction analysis clarified that Ag was loaded onto the TiO2 powders as AgO. Scanning electron microscope, particle size, and BET surface area analyses revealed that particle size of the TiO2 powders decreased but, due to agglomeration their specific surface area also decreased after ball milling. As-received P25, NT-22, and TiO(OH)2 powders degraded 94%, 46%, and 26% of MO solution, respectively under 1 hour UV light irradiation. Ag loading improved photocatalytic activity of TiO2 powders under UV irradiation. The best photocatalytic performance was achieved by 13.8 ml AgNO3 solution added NT-22 powders. The P25, NT-22, and TiO(OH)2 powders milled by adding 13.8 ml AgNO3 solution decomposed 85%, 96%, and 67% of MO solution, respectively under 1 hour UV light irradiation.Results have shown that mechanical ball milling could be used as an alternative method not only for the size reduction of TiO2 powders but also for the loading of silver on TiO2 powders. The Ag loaded TiO2 powders decompose MO solution in much less duration in UV ırradiation as compared to as received TiO2 powder.
NaturalLanguageKeyword :
“Ball Milling” , “Silver” , “TiO2” , “Powder” , “Photocatalytic Properties” , “Methyl Orange”
