PHOTOCATALYTIC NIOBIUM AND TANTALUM DOPED MONODISPERSED NANOPARTICLES OF TITANIA FOR VISIBLE-LIGHT APPLICATIONS

被引：0

作者：

Stengl, Vaclav ^{[1
]}

Houskova, Vendula ^{[1
]}

Bakardjieva, Snejana ^{[1
]}

Murafa, Nataliya ^{[1
]}

机构：

[1] Inst Inorgan Chem AS CR Vvi, Rez 25068, Czech Republic

来源：

NANOCON 2009, CONFERENCE PROCEEDINGS | 2009年

关键词：

titania; peroxo-complexes; niobium; tantalum; photocatalysis; ANATASE TIO2; PHOTOACTIVITY; DEGRADATION; ADSORPTION; PARTICLES;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Niobium or tantalum doped anatase were prepared by thermal hydrolysis of peroxotitanium complex aqueous solutions dissolving niobium or tantalum peroxo-comples at 100 degrees C for 3 days The synthesized samples were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM), surface area (BET) and porosity determination (BJH) The photocatalytic activity of doped titania samples was determined by decomposition of salicylic acid during irradiation at 365 nm and 400 nm Niobium-doping caused the increase of unit cell constants of anatase and the shape change of anatase crystallites from spindle-like to cubic-like structure. The niobium and tantalum doping increases the stability of anatase to above 1000 degrees C by inhibiting the growth of Mania crystallites In the visible region the photocatalytic activity is directly proportional to the concentration and increases with increasing concentration of Nb The niobium addition increases the photocatalytic activity of Mania in the visible-light region

引用

页码：249 / 263

页数：15

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