Photocatalytic and photodisinfectant activity of sulfated and Eu doped anatase against clinically important microorganisms

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• 作者：Robert Michal ; Ewa Dworniczek ; M谩ria 膶aplovi膷ov谩 ; Maro拧 Gregor ; L鈥檜bom铆r 膶aplovi膷 ; Alicja Seniuk ; Peter Ku拧 ; Gustav Plesch
• 关键词：D. TiO2 ; E. Biomedical applications ; Photocatalytic properties ; Europium ; Sulfate
• 刊名：Ceramics International
• 出版年：May, 2014
• 年：2014
• 卷：40
• 期：4
• 页码：5745-5756
• 全文大小：4807 K

文摘

Surface sulfation and Eu³⁺ doping of 0.2-2 碌m anatase aggregates prepared by precipitation significantly increased their porosity, specific surface, crystallinity and photocatalytic activity in phenol photo-mineralization. Such large, porous clusters of photocatalysts containing nanocrystals with well developed crystallinity which sediment more quickly than nanopowder suspensions are advantageous in water treatment applications. Sulfated anatase co-doped with Eu³⁺ exhibited the highest photoactivity. This is composed of well developed crystallites in the 31-55 nm size-range, with evident faceting. Although the investigated powders showed very weak photo-disinfectant activity against Gram-negative Escherichia coli rods, they exhibit moderate efficacy against Gram-positive bacterial strains of methicillin resistant Staphylococcus aureus (MRSA) and Enterococcus faecalis. The investigated powders, especially the Eu³⁺ doped ones, are highly active in elimination of the eukaryotic Candida albicans.