相关链接
联系方式
  • 通信地址:浙江省台州市椒江区市府大道1139号生命科学大楼D楼环境工程技术研究所
  • 邮编:318000
  • 电话:0576
  • 传真:
  • Email:zhuhuayue@126.com
当前位置:> 首页 > 论文著作 > 正文
37. Effect of calcination temperature on physical parameters and photocatalytic activity of mesoporous titania spheres using chitosan/poly(vinyl alcohol) hydrogel beads as a template
作者:R. Jiang, H.-Y. Zhu, H.-H. Chen, J. Yao, Y.-Q. Fu, Z.-Y. Zhang, Y.-M. Xu
关键字:chitosan
论文来源:期刊
具体来源:Applied Surface Science
发表时间:2014年


Mesoporous titania spheres were prepared by modi?ed sol–gel method using chitosan/poly(vinyl alcohol) hydrogel beads as a template. Effects of calcination temperature on physical parameters were investigated by X-ray diffraction (XRD), N2 adsorption-desorption, Fourier transform infrared (FT-IR) spectra, thermogravimetry and differential thermal analyses (TG-DTA), high-resolution transmission electron microscope (HRTEM) and scanning electron microscopy (SEM). The photocatalytic activity of mesoporous titania spheres prepared was also evaluated by photocatalytic degradation of phenol as a model molecule under UV irradiation. With increasing calcination temperature, average crystallite size and pore size increased. In contrast, Brunauer-Emmett-Teller (BET) specific surface areas, porosity and pore volumes steadily decreased. Results of characterization proved that prepared titania spheres with highly organized pores were mesoporous structure. The photocatalytic activity of mesoporous titania spheres calcined at 500°C was more effective than those calcined at other temperatures, which were attributed to the porous structure, large BET surface area, crystalline, and smaller crystallite size. This work may provide new insights into the preparation of novel mesoporous titania spheres and further practical applications in the treatment of wastewater.