期刊
JOURNAL OF POROUS MATERIALS
卷 22, 期 5, 页码 1393-1399出版社
SPRINGER
DOI: 10.1007/s10934-015-0018-6
关键词
Graphitic carbon nitride; Higher temperature; Photocatalyst; Porous structure; Visible light; Dye
资金
- National Natural Science Foundation of China [21373069]
- Science Foundation of Harbin City [NJ20140037]
- State Key Lab of Urban Water Resource and Environment of Harbin Institute of Technology [HIT2015DX08]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. 201327]
Graphitic carbon nitride (g-C3N4) was prepared by the polycondensation of melamine at 650 A degrees C for 2 h, then thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, elemental analysis, transmission electron microscopy, N-2 adsorption-desorption isotherms, UV-Vis diffuse reflectance spectra and photoluminescence spectra. The photocatalytic activity of g-C3N4 catalyst was evaluated by the degradation of Rhodamine B, Methylene blue and phenol solution under visible-light irradiation, which showed that g-C3N4 calcined at 650 A degrees C increased the degree of condensation, thus led to the decreased band gap and exhibited better photocatalytic activity than the reference sample treated at 520 A degrees C and P25. The integrated positive effects of porous structure, larger surface area, stronger visible-light absorption and higher separation efficiency for photoinduced electron-hole pairs over g-C3N4 treated at 650 A degrees C resulted in its improved photocatalytic activity for degrading pollutants. Additionally, the as-prepared g-C3N4 possessed good structural and catalytic stability after three recycles.
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