sc8b02217_si_001.pdf (2.24 MB)
Nickel-Doped Excess Oxygen Defect Titanium Dioxide for Efficient Selective Photocatalytic Oxidation of Benzyl Alcohol
journal contribution
posted on 2018-07-19, 00:00 authored by Houde She, Hua Zhou, Liangshan Li, Lei Wang, Jingwei Huang, Qizhao WangIn
this study, a novel composite Ni-OTiO2 was prepared
by doping nickel and introducing excess oxygen defects in TiO2. The as-synthesized Ni-OTiO2 particles were characterized
by scanning electron microscopy, X-ray
diffractino, transmission
electron microscopy, Fourier
transform infrared spectroscopy, differential
reflectance spectroscopy, photoluminescence, photoelectrochemistry,
and X-ray photoelectron spectroscopy.
When employing Ni (1%)-OTiO2 as photocatalyst, the conversion
of benzyl alcohol (BA) was up to 93% by 1 h irradiation derived from
a 300 W xenon lamp, which is ∼8-times
higher than that using pure TiO2. Moreover, while being
irradiated with the
300 W xenon lamp (using a filter, λ > 420 nm), the Ni (1%)-OTiO2 conducted photocatalytic system can give 86% conversion of
BA to benzaldehyde within
1 h. Specifically, during photocatalysis, a peroxo group and nickel
ion act as the electron carrier, promoting the separation of the electron–hole
pair. It is considered that the highly improved photocatalytic ability
after modification of pure TiO2 is ascribable to the synergistic
effect of excess oxygen defects and nickel doping in TiO2.