期刊
CHEMICAL ENGINEERING JOURNAL
卷 173, 期 1, 页码 1-10出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2010.11.028
关键词
TiO2; Sepiolite; Low-temperature; Acid red G; 4-Nitrophenol; Photocatalytic activity
资金
- National Basic Research Program of China (973 Program) [2007CB613302]
- Chinese Ministry of Education [108164]
- National Key Technology R&D Program of China [2006BAJ08B10-04, 2008BAJ08B13-04]
The TiO2/sepiolite composites were successfully prepared by a facile and low-cost sol-gel technique at low temperature, using TiCl4 as a precursor. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectrum (UV-vis DRS), N-2 adsorption-desorption and Fourier transform infrared (FT-IR) spectroscopy. The results showed that the ordered structure of sepiolite in the as-prepared samples was destroyed to some extent and the particle sizes of TiO2 in the composites were less than 10 nm. The as-prepared samples showed an efficient photocatalytic activity for the degradation of acid red G (ARC) and 4-nitrophenol (4-NP) under UV light irradiation, which could be attributed to the synergetic effect of the large specific surface area of the TiO2/sepiolite composites and the anatase phase of TiO2 in it. (C) 2010 Elsevier B.V. All rights reserved.
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