作    者：蒋茹,朱华跃,姚俊,付永前, 等
影响因子：2.538
刊物名称：Applied Surface Science
出版年卷：2014, 319: 189–196

文章摘要：Mesoporous titania spheres were prepared by modified sol–gel method using chitosan/poly(vinyl alco-hol) hydrogel beads as a template. Effects of calcination temperature on physical parameters wereinvestigated by X-ray diffraction (XRD), N2adsorption–desorption, Fourier transform infrared (FT-IR)spectra, thermogravimetry and differential thermal analyses (TG-DTA), high-resolution transmissionelectron microscope (HRTEM) and scanning electron microscopy (SEM). The photocatalytic activity ofmesoporous titania spheres prepared was also evaluated by photocatalytic degradation of phenol as amodel molecule under UV irradiation. With increasing calcination temperature, average crystallite sizeand pore size increased. In contrast, Brunauer–Emmett–Teller (BET) specific surface areas, porosity andpore volumes steadily decreased. Results of characterization proved that prepared titania spheres withhighly organized pores were mesoporous structure. The photocatalytic activity of mesoporous titaniaspheres calcined at 500◦C was more effective than those calcined at other temperatures, which wereattributed to the porous structure, large BET surface area, crystalline, and smaller crystallite size. Thiswork may provide new insights into the preparation of novel mesoporous titania spheres and furtherpractical applications in the treatment of wastewater.

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