Hybrid Composite of Sn(IV)-Porphyrin and Mesoporous Structure for Enhanced Visible Light Photocatalytic Degradation of Organic Dyes

Two hybrid composites ( and ) were fabricated by chemical adsorption of ( -dihydroxo)(5,10,15,20-tetraphenylporphyrinato)tin(IV) ( ) on mesoporous structured Mobil Composition of Matter No. 41 (MCM-41) and SiO nanoparticles. These materials were characterized by Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, transmission electron microscopy, and field-emission scanning electron microscopy techniques. The incorporation of into MCM-41 and SiO supports efficient photocatalytic degradation of the anionic erioglaucine, cationic rhodamine B, and neutral -cresol purple dyes under visible light irradiation in an aqueous solution. The performances of degradation of these dyes by these photocatalysts under visible light irradiation varied from 87 to 95%. The pseudo-first-order degradation rate constant of organic dyes for was higher than those of and . These visible light photocatalysts showed remarkable stability and reliable reusability.