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Citation: SHEN Xing-Can, GUO Wei-Min, GUO Yan-Fang, LIANG Hong. Preparation and Photocatalytic Property of Iron-doped TiO₂ Nanoparticles[J]. Chinese Journal of Applied Chemistry, ;2005, 22(10): 1070-1074. shu

Preparation and Photocatalytic Property of Iron-doped TiO₂ Nanoparticles

1.
College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004

Corresponding author: SHEN Xing-Can,
Received Date: 5 December 2004
Available Online: 27 March 2005
Fund Project: 国家自然科学基金(20261001) (20261001)广西自然科学基金(桂科青:0339022) (桂科青:0339022)

A series of iron-doped nano-titania were prepared from titanium tetrachloride precursor via a two-step method involving microwave and conventional heating treatments.The iron-doped nano-titania was characterized with XRD,TEM,UV-Vis and XPS techniques.The results indicated that the iron-doped nano-titania with an average diameter of 10 nm contained anatase as the main phase and rutile phase.It was found that the ferric ion dopant of a proper concentration promoted the formation of the rutile phase,and reduced the crystallite size of anatase.An increase of 0.3 eV in the binding energy of Ti_2p was observed after the nano-titania was doped with 0.5%(mole fraction) ferric ions.Moreover,the photoresponse shifted to the visible region for iron-doped nano-titania.Photocatalytic activity was evaluated by measuring the decomposition rates of vitamin B₁₂ exposed to UVA(320~400) radiation.The results indicated that the optimum mole fraction of ferric ions was 0.5% for the iron-doped nano-titania,which doubled the photocatalytic decomposition rate of vitamin B₁₂ compared to that of undoped nano-titania.
- iron doped nano-titania,
- microwave synthesis,
- photocatalytic decomposition,
- vitamin B₁₂
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Preparation and Photocatalytic Property of Iron-doped TiO₂ Nanoparticles