Preparation of Pt£¯TiO2-xNx and
Its Photocatalytic Activity of Hydrogen Production
Yang Honghui, Yan Wei, Zhang Yaojun, Guo Liejin
(School of State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong
University, Xi'an 710049, China)
Abstract: Nanostructured nitrogen-doped titania was prepared by using TiClª4 as the
precursor with sol-gel method, and platinum was loaded on the surface of TiO2-xNx
with chemical reduction method. The structure of TiO2-xNx was demonstrated to
be anatase by the means of X-ray diffraction. The ultraviolet visible reflectance spectrum
of the catalyst is different from that of TiOª2 but it is consistent with that of TiO2-xNx.
The activity of hydrogen production raises markedly by loading platinum and shows dual
maxima with the increasing of Pt content. When Pt content was 0.05% and 0.35%, the
hydrogen production activity of Pt/TiO2-xNx catalysts reaches to the maxima.
Scan electronic microscope photos presented that Pt particles agglomerate partially with
the increasing Pt contents, and the particle sizes are within 10 and 100 nm. When the
content of Pt is 0.05%, the Pt particles distribute uniformly on the TiO2-xNxª«
surface with an approached size of 10 nm to lead to the maximum photocatalytic activity of
hydrogen production.
Keywords: Pt loaded; nitrogen doped titania; photocatalysis; hydrogen production