Preparation and Characterization of Supported Molybdenum Doped TiO2 on α-Al2O3 Ceramic Substrate for the Photocatalytic Degradation of Ibuprofen (IBU) under UV Irradiation

Catalysts

Chukwuka Bethel Anucha¹  Emin Bacaksiz¹  Ilknur Altin¹  Pavlos K. Pandis²  Vassilis N. Stathopoulos²  Christos Argirusis³  Constantina-Dia Andreouli⁴  Zoi Tatoudi⁴ 

[1] Department of Chemistry/Physics, Faculty of Science, Karadeniz Technical University, Trabzon 61080, Turkey;Laboratory of Chemistry and Materials Technology, Department of Agricultural Development, Agrofood and Management of Natural Resources, Psachna Campus, National and Kapodistrian University of Athens, 34400 Evia, Greece;Laboratory of Inorganic Materials Technology, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15780 Athens, Greece;Materials Industrial Research and Technology Center S.A., Anthion-Lamias National Road (76th km), P.O. Box 18646, 34100 Chalkida, Greece;

关键词: TiO₂;    heterogeneous photocatalyst;    doping;    sonochemical preparation;    contaminants of emerging concern (CECs);    UV irradiation;   

DOI  :  10.3390/catal12050562

来源: DOAJ

【 摘 要 】

TiO₂-based photocatalyst materials have been widely studied for the abatement of contaminants of emerging concerns (CECs) in water sources. In this study, 1.5 wt% Mo-doped HRTiO₂ was obtained by the sonochemical method. The material was analyzed and characterized for thermal, structural/textural, morphological, and optical properties using TGA-DSC, XRD, TEM, FTIR, XPS, SEM-EDS, BET (N₂ adsorption-desorption measurement and BJH application method), and UV-Vis/DRS measurement. By the dip-coating technique, ~5 mg of Mo/HRTiO₂ as an active topcoat was deposited on ceramic. In suspension and for photocatalyst activity performance evaluation, 1 g/L of 1.5 wt% (Mo)/HRTiO₂ degraded ~98% of initial 50 mg/L IBU concentration after 80 min of 365 nm UV light irradiation and under natural (unmodified) pH conditions. Effects of initial pH condition, catalyst dosage, and initial pollutant concentration were also investigated in the photocatalyst activity performance in suspension. The photocatalyst test on the supported catalyst removed ~60% of initial 5mg/L IBU concentration, while showing an improved performance with ~90% IBU removal employing double and triple numbers of coated disk tablets. After three successive cycle test runs, XRD phase reflections of base TiO₂ component of the active photocatalyst supported layer remained unchanged: An indication of surface coat stability after 360 min of exposure under 365 nm UV irradiation.

【 授权许可】

Unknown