Remarkably enhanced photocatalytic activity of ordered mesoporous carbon/g-C₃N₄ composite photocatalysts under visible light.

摘要: Ordered mesoporous carbon/g-C3N4 (OMC/g-C3N4) composites with efficient photocatalytic activity under visible light irradiation were prepared by a facile heating method. The as-prepared OMC/g-C3N4 thoroughly characterized X-ray diffraction, Fourier transform infrared spectroscopy, elemental analyses, transmission electron microscopy energy dispersion N2 adsorption-desorption analysis, UV-vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. activities evaluated degrading Rhodamine B dye, exhibited much higher than pristine g-C3N4. Moreover, the catalysts retained good stability photodegradation efficiency hardly changed after five cycles. degradation rate of photocatalyst was almost 10 times as high that g-C3N4, which indicated OMC played an important role in remarkable improvement activity. significant enhancement over catalyst could be ascribed to combined effects coming from enhanced adsorption, enriched adsorption dye on subsequent separation photogenerated electrons holes. In addition, possible mechanism for process proposed basis active species scavenging experiments.