Preparation and photocatalytic property of α-Bi2O3 nanofibers
Bi2O3nanofibers were prepared by electrospinning, and with the effects of the calcination temperature on morphology and photocatalytic activity of theα-Bi2O3nanofibers studied.The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric differential-thermal analysis (TG-DTA), ultraviolet-visible diffuse reflection spectrum (UV-vis DRS) and N2adsorption desorption isotherm (BET), respectively.The photocatalytic properties of the prepared samples were evaluated by photocatalytic degradation of Rhodamine B (RhB) and tetracycline (Tc), which were used as the degradation models.The results showed that the crystal structure of Bi2O3samples was all monoclinic phaseα-Bi2O3after calcining the composite of fiber precursor PVP/Bi (NO3) 3at 450℃, 500℃and 550℃in air atmosphere.In addition, the morphology of Bi2O3samples was gradually changed from small diameter fiber (～100nm) to crude (～150nm), and finally broken into spherical particles at 550℃with the increase of calcination temperature.It was also found that the Bi2O3nanofiber obtained at 450℃exhibits the excellent visible-light photocatalytic activity for the degradation of RhB and Tc with the degradation rates of 98.1％and 94.5％within 180min under Xe lamp (150W) irradiation.
国家科技期刊平台
NSTL
万方数据
维普
