γ-CD-Functionalized TiO2 Nanoparticles For the Photocatalytic Degradation of Organic Dyes
In this work, an efficient photocatalyst based on gamma-cyclodextrin-modified titanium dioxide nanoparticles (TiO2/γ-CD NPs) was synthesized and used for photocatalytic degradation of rhodamine B (RhB), methyl orange (MO) and methylene blue (MB). The results of FESEM, EDX, TEM, FT-IR, XRD and BET surface area measurement showed that the TiO2 NPs were effectively modified with γ-CD. The photocatalytic properties of the TiO2/γ-CD NPs were evaluated by the degradation of some organic dyes in aqueous solution under ultraviolet (UV) light illumination. The experimental results confirmed that the TiO2/γ-CD had exhibited efficient photocatalytic activities higher than that of the pure TiO2 in the degradation of investigated dyes. The γ-CD could increase the lifetime of the excited states of the unreactive guests and facilitate electron transfer from the excited dye to TiO2 conduction band. The results indicated that the first-order kinetic model well describes the degradation of the dyes by TiO2/γ-CD NPs. the photocatalytic reaction rate constants for RhB, MO and MB dyes in the presence of TiO2/γ-CD NPs were 4, 5.6 and 4.2 times higher than that of pure TiO2, respectively. In addition, the TiO2/γ-CD NPs can be used for several times in real application as an effective photocatalyst.
Progress in Color, Colorants and Coatings, Volume:13 Issue:1, 2020
23 - 39
روشهای دسترسی به متن این مطلب
در سایت عضو شوید و هزینه اشتراک یکساله سایت به مبلغ 300,000ريال را پرداخت کنید. همزمان با برقراری دوره اشتراک بسته دانلود 100 مطلب نیز برای شما فعال خواهد شد!
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی همه کاربران به متن مطالب خریداری نمایند!