Affiliations: School of Materials and Chemistry, University of
Science and Technology of China, Hefei 230026, China | Anhui Institute of Architecture and Industry, Hefei
230022, China | Research Center for Eco-Environmental Sciences,
Chinese Academy of Sciences, Beijing 100085, China
Abstract: A visible-light photocatalyst was prepared by calcination of the
hydrolysis product of Ti(SO_4)_2 with
ammonia as precipitator. The color of this photocatalyst was vivid yellow. It
could absorb light under 550 nm wavelength. The crystal structure of anatase
was characterized by XRD. The structure analysis result of X-ray fluorescence
(XRF) shows that doped-nitrogen was presented in the sample. The photocatalytic
activities were evaluated using methyl orange and phenol as model pollutants.
The photocatalytic activities of samples were increasing gradually with
calcination temperature from 400°C to 700°C under UV irradiation. It
can be seen that the degradation of methyl orange follows zero-order kinetics.
However, the calcination temperatures have no significant influence on the
degradation of phenol under sunlight. The N-doped catalyst shows higher
activity than the bare one under solar irradiation.
