Various TiO₂ microcrystals: Controlled synthesis and enhanced photocatalytic activities

详细信息    查看全文

• 作者：Fengyu Wei ; Hualing Zeng ; Peng Cui ; Shuchuan Peng ; Tianhu Cheng
• 关键词：Photocatalytic activity ; TiO₂ ; Microspheres ; Sedimentation
• 刊名：Chemical Engineering Journal
• 出版年：2008
• 出版时间：1 October 2008
• 年：2008
• 卷：144
• 期：1
• 页码：119-123
• 全文大小：669 K

文摘

Titania microspheres with higher photocatalytic activity have been synthesized using TiCl₄ and FeCl₃ as the precursor in the presence of Span-80. The products were characterized with XRD, TEM and UV–vis DRS. XRD and TEM indicated that the microsphere was a mixture of rutile, brookite and anatase with a diameter of about 5–7 μm. The photocatalytic experiments revealed that the microspheres exhibited high photocatalytic activities under UV-light and solar irradiation. The degradation rate of methyl orange (MO) was 100 % under UV-light irradiation for 3 h and 91 % under solar irradiation for 6 h. In particular, the catalysts could be readily separated by sedimentation after the photocatalytic reaction.