Preparation, characterization and enhanced photocatalytic activity of Ni2+ doped titania under solar light

• Authors: L. Gomathi Devi , Nagaraju Kottam , S. Girish Kumar , K. Eraiah Rajashekhar
• Languages of publication: EN

Abstracts

EN

Anatase TiO2 was prepared by sol-gel method through the hydrolysis of TiCl4. Ni2+ was doped into the TiO2 matrix in the concentration range of 0.02 to 0.1 at.% and characterized by various analytical techniques. Powder X-ray diffraction revealed only anatase phase for all the samples, while diffuse reflectance spectral studies indicated a red shift in the band gap absorption to the visible region. The photocatalytic activities of these photocatalysts were probed for the degradation of methyl orange under natural solar light. The photocatalyst with optimum doping of 0.08 at.% Ni2+, showed enhanced activity, which is attributed to: (i) effective separation of charge carriers and (ii) large red shift in the band gap to visible region. The influence of crystallite size and dopant concentration on the charge carrier trapping - recombination dynamics is investigated. [...]

Keywords

EN

Ni2+ doping; Crystallite size; Solar light photocatalysis; Charge carrier trapping-recombination dynamics

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2010
• Volume: 8
• Issue: 1
• Pages: 142-148

Dates

published

1 - 2 - 2010

online

16 - 2 - 2010

Contributors

author

L. Gomathi Devi

• Department of Post Graduate Studies in Chemistry, Central College City Campus, Bangalore University, Bangalore, 560001, India

author

Nagaraju Kottam

• Department of Post Graduate Studies in Chemistry, Central College City Campus, Bangalore University, Bangalore, 560001, India

author

S. Girish Kumar

• Department of Post Graduate Studies in Chemistry, Central College City Campus, Bangalore University, Bangalore, 560001, India

author

K. Eraiah Rajashekhar

• Department of Post Graduate Studies in Chemistry, Central College City Campus, Bangalore University, Bangalore, 560001, India

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Identifiers

DOI

10.2478/s11532-009-0115-y