A COST-EFFECTIVE MAGNETIC PHOTOCATALYST PALYGORSKITE-TiO2-FexOy WITH EXCELLENT PERFORMANCE FOR DYE PHOTODEGRADATION UNDER VISIBLE LIGHT

作者：Zhang, Jiahui; Zhang, Lili^*; Huang, Jin; Zhou, Shouyong; Chen, Haiqun; Zhang, Weiguang; Wang, Xin

来源：Nano, 2014, 9(6): 1450063.

DOI：10.1142/S1793292014500635

• Magnetically recoverable
• visible light
• photocatalyst
• TiO2-FexOy
• palygorskite
• methyl orange

Palygorskite (denoted as Pal) was used as an economical carrier of hybrid photocatalyst TiO2-FexOy via an in situ depositing technique (marked as Pal-TiO2-FexOy). The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), brunneremmet-teller (BET) measurements, X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectra measurements. Results showed that TiO2-FexOy composite particles with average size of about 10 nm were loaded onto the Pal fibers' surface. FexOy acted not only as magnetic source but also took part in the formation of TiO2-FexOy heterojunction structure, which resulted in the obvious absorption in visible light region for the obtained Pal-TiO2-FexOy composite photocatalyst. The obtained Pal-TiO2-FexOy shows excellent photocatalytic activity toward photodegradation of Methyl orange (MO) under visible light irradiation and the degradation ratio reached 94% within 180 min. Moreover, Pal-TiO2-FexOy could be readily recovered from the reaction solution by the magnet. Possible mechanism for the enhancement was also proposed.

• 出版日期2014-8
• 单位常州大学; 淮阴师范学院; 南京理工大学