کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
73408 | 49057 | 2013 | 8 صفحه PDF | دانلود رایگان |
• Porous Nd-doped TiO2 monolith was synthesized using polystyrene spheres as a template by a facile sol-gel method.
• Nd doping can suppress the recombination of hole/electron pairs leading to the extended photo-produced-carrier lifetime.
• The porous structure can provide a large surface area, facilitating enhanced adsorption and fast transfer of pollutants.
A porous Nd-doped TiO2 monolith was successfully synthesized with polystyrene spheres as a template using a sol–gel method followed by calcination at high temperature. The porous Nd-doped TiO2 monolith was characterized by X-ray diffractometry, scanning electron microscopy and Brunauer–Emmett–Teller measurements. Nd doping can increase the TiO2 surface area by hindering the growth of large TiO2 particles, and suppressing the recombination of photo-produced hole/electron (h+/e−) pairs. Moreover, its porous structure can provide a large surface area, facilitating enhanced adsorption and fast transfer of pollutants. To evaluate the photocatalytic activity of the porous Nd-doped TiO2 monolith, the photo-degradation for methyl orange was investigated under UV–Vis irradiation. The porous 0.5% Nd-doped TiO2 monolith showed better behavior than the other as-prepared samples and Degussa P25 due to its narrow band gap, high efficiency for h+/e− pair separation, and large surface area. The synergistic combination of Nd doping and the porous structure is a promising material design strategy for use in the degradation of organic pollutants.
Figure optionsDownload as PowerPoint slide
Journal: Microporous and Mesoporous Materials - Volume 182, 1 December 2013, Pages 87–94