Preparation, characterization, and photocatalytic activity of La-doped TiO2 supported on activated carbon at the decomposition of methylene orange

作者：Xing Jun^*; Sun Xiaogang; Qiu Jingping

来源：Russian Journal of Physical Chemistry, 2015, 89(6): 1108-1114.

DOI：10.1134/S003602441506014X

• titanium dioxide
• activated carbon
• La-doping
• doped photocatalyst
• photocatalytic activity
• dye degradation

A composite photocatalyst (La/TiO2/AC) has been prepared by supporting photoactive La-doped TiO2 (La/TiO2) on activated carbon (AC) via hydrolysis of tetrabutyl titanate (Ti(OC4H9)(4)) with La(NO3)(3) center dot 6H(2)O and Ti(OC4H9)(4) as precursors in the presence of activated carbon. The prepared photocatalysts were characterized by BET surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-vis absorption spectroscopy. The photocatalytic activities of the obtained photocatalysts under UV light are estimated by measuring the degradation rate of methylene orange in aqueous solution. The effect of La-doped content on the photocatalytic activity was studied and the result revealed that 0.2 mol % La/TiO2/AC exhibited highest photoactivity. In addition, the recyclability of the prepared photocatalyst was also confirmed, the photocatalytic activity of La/TiO2/AC remains about 86.5% of its activity as-prepared after being used four times. The photocatalyst therefore may be used as effective catalyst in photooxidation reactions and potentially applied for the treatment of water contaminated by organic pollutants.

• 出版日期2015-6
• 单位东北大学