Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629534 | Journal of the European Ceramic Society | 2014 | 8 Pages |
Abstract
In this work, porous alumina ceramics with highly ordered capillaries were successfully fabricated by ionotropic gelation process of alginate/alumina suspensions. By varying the initial solid loading (10-30 wt%) of slurries, the porosity of alumina ceramics ranged from 60.4% to 79.5% with controlled pore size (180-315 μm). Due to the well-crosslinked macroporous structure and large specific surface areas, the porous ceramics were utilized as the photocatalyst supports of TiO2 catalysts whose photocatalytic activity was characterized by degrading methyl blue under UV irradiation. TiO2 coatings prepared by sol-gel method demonstrated excellent adhesion to the substrates. When the solid loading of supports reached 15 wt%, the TiO2 coatings showed the highest photocatalytic efficiency of 79.52%. Besides, TiO2 films possessed nearly the same photocatalytic activity as titania/water suspension. Thus, the honeycomb ceramic prepared by self-organization process holds promise for use as photocatalyst supports in water purification without recycling process of powders.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Linjing Du, Wei Liu, Shengliang Hu, Yanzhong Wang, Jinlong Yang,