期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 23, 页码 11843-11850出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm16241e
关键词
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资金
- National Science Foundation of China [21003157]
- Beijing Nova Program [2008B76]
- Doctor Foundation of Chinese Ministry of Education [200804251014]
Novel polyaniline-graphitic carbon nitride (PANI-g-C3N4) composite photocatalysts with different PANI:g-C3N4 ratios were synthesized by in situ deposition oxidative polymerization of aniline monomer in the presence of g-C3N4 powder cooled in an ice bath. The resulting PANI-g-C3N4 composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL). The photoelectrochemical measurements were performed using several on-off cycles of visible light irradiation. The photocatalytic activities of the novel photocatalysts were evaluated using methylene blue as a target pollutant. The PANI-g-C3N4 composites exhibit obviously enhanced photocatalytic performance under visible light irradiation, which is much higher than that of TiO2 (P25). The synergistic effect between PANI and g-C3N4 is found to lead to an improved photo-generated carrier separation. A possible photocatalytic mechanism of PANI on the enhancement of visible light performance is proposed to guide further improvement of their photocatalytic activity.
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