N-doped anatase TiO2 has been prepared by thermal decomposition of Ti containing metal complexes. The light absorption onset has been shifted to the visible region by ∼ 100 nm when compared to pure TiO2. The N environment of N-doped TiO2 has been studied by XPS and the results confirm the presence of N-Ti-O in the N-doped samples. Also, there is a shift in the binding energy values of Ti 2p3/2, and the additional peak for O Is in N-doped TiO2 confirms the increase in the covalent nature of TiO2 during the N-doping. The photocatalytic activity of N-doped TiO2 has been studied both in the UV and visible regions and N-doped TiO2 shows higher activity than the Degussa TiO2 in the visible region. © World Scientific Publishing Company.

Balasubramanian Viswanathan

Ram Prasad Viswanath

Binding energy

Doping (additives)

Light absorption

Nanoparticles

Photocatalysts

Pyrolysis

Titanium dioxide

X ray photoelectron spectroscopy

ANION N-DOPED TIO2

METHYLENE BLUE DECOMPOSITION

Photocatalyst

Catalyst activity

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

INFLUENCE OF HETEROATOM DOPING OF TiO2 NANOPARTICLE ON THE RED SHIFT AND THE RELATED CATALYTIC ACTIVITY

International Journal of Nanoscience

Nitrogen doped spherical TiO2 has been prepared by thermal decomposition of Ti-melamine complex in air atmosphere. A clear shift in the onset light absorption from UV region (&lt;400) to visible region (&gt;520 nm) has been observed for the N-doped samples. It has been deduced from the optical absorption spectra that the higher calcination temperature results in the decrease in the amount of N-doping. The XRD results revealed the phase transition of TiO2 from anatase to rutile crystalline phase, starting at calcination temperature ≥600 °C. The electron microscopic images reveal the formation of spherical and flakes of TiO2 nanocrystals (25 nm). The chemical nature of N in the N-TiO2 has been evolved through X-ray photoelectron spectroscopy. The presence of different types of N species have been observed corresponding to different oxidation states and the presence of Ti-N and O-Ti-N have been confirmed from the observed binding energy values. Photocatalytic decomposition of methylene blue has been carried out both in the visible region and UV + visible region. In the visible region, N-TiO2 showed higher activity compared to the undoped commercial TiO2 (Degussa P25). © 2007 Elsevier B.V. All rights reserved.

Applied Catalysis B: Environmental

Characterization and photocatalytic activity of N-doped TiO2 prepared by thermal decomposition of Ti-melamine complex

Journal of the Geological Society of India

Dr. S. Viswanathan (1933-2017)

Thin Solid Films

Nitrogen-doped titanium oxide films as visible light photocatalyst by vapor deposition

The Journal of Physical Chemistry B

Photoelectron Spectroscopic Investigation of Nitrogen-Doped Titania Nanoparticles

Journal of Solid State Chemistry

The preparation and characterization of La doped TiO2 nanoparticles and their photocatalytic activity

Chemistry Letters

N-doped TiO2Nanotube with Visible Light Activity

Influence of heteroatom doping of TiO2 nanoparticle on the red shift and the related catalytic activity

Journal	International Journal of Nanoscience
ISSN	0219581X
Open Access	No