Visible light induced TiO2 pillared MMT photocatalyst coupling-doped with S and N
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摘要:
Visible light induced titanium dioxide (TiO2) pillared montmorillonite clay (MMT)photocatalyst coupling-doped with S and N elements was prepared by the two-step ad-sorption method. The photocatalyst was characterized by X-ray photoelectron spectros-copy (XPS) and ultraviolet-visible (UV-vis) absorption spectroscopy. The photocatalysic ef-ficacy of the prepared photocatalyst for degrading gaseous formaldehyde was evaluatedunder visible light irradiation. The degrading rate of gaseous formaldehyde is nearly 85%in 300 min visible light irradiation. The results demonstrate that the much higher visiblelight photocatalytic activity of the photocatalyst is due to the synergistic effects of coupling-doping of S and N elements to TiO2, extensive specific surface area of MMT and quantumsized efficacy between layers of MMT.