期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 46, 期 12, 页码 6829-6833出版社
SPRINGER
DOI: 10.1007/s11664-017-5749-5
关键词
Bi2Ti2O7; nanoparticles; composite materials; photocatalytic activity; hydrothermal synthesis; phase transition
资金
- Ministry of Education and Training [B 2016 - SPH - 22]
In this work, the influence of annealing treatment on the phase evolution and photocatalytic behavior in a Bi-Ti-Cl-O system prepared by a hydrothermal method was investigated. The crystal structure, particle surface morphology, and absorption properties of the samples were characterized by x-ray diffraction, field emission scanning electron microscopy, and UV-Vis diffuse-reflectance spectroscopy, respectively. The transformation process was found to occur in three stages, involving BiOCl, Bi2Ti2O7/BiOCl composite, and Bi2Ti2O7 phases, with increasing annealing temperature. The photocatalytic activity of the samples was evaluated through photodegradation of Rhodamine B under simulated sunlight irradiation. It was found that the photocatalytic activity of Bi2Ti2O7/BiOCl nanocomposites is greater than that of BiOCl or Bi2Ti2O7. The enhanced photocatalytic activity of the Bi2Ti2O7/BiOCl nanocomposite could be attributed to the effective separation of electron-hole pairs.
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