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Study of photocatalytic activity of Cd-doped mesoporous nanocrystalline TiO2 prepared at low temperature

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Abstract

Mesoporous nanocrystalline Cd-doped titania was firstly prepared at low temperature by a modified sol–gel method, using dodecylamine as a template. The template could be easily removed by refluxing samples in nitric acid ethanol solution. The Fourier transform infrared spectrometer (FT-IR), low-angle and wide-angle X-ray diffraction (XRD), N2 adsorption–desorption, transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and UV–visible diffuse reflectance spectroscopy were used for the characterization of catalysts. The characteristic results clearly showed that Cd2+ ions were doped into the titania lattice, and the mesoporous architecture of Cd-doped TiO2 was composed of mixed-phase crystal textures of anatase and brookite. The samples displayed high visible-light photocatalytic activity for photodegradating 2,4-dichlorophenol (2,4-DCP) solution. The high activities of samples were attributed to the bicrystalline framework, large BET surface area, small crystallite size, and Cd-doping.

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Acknowledgments

This work has been supported by the Science and Technology Commission of Shanghai Municipality (07JC14015), the National Nature Science Foundation of China (20773039), the National Basic Research Program of China (973 Program, 2007CB613306, 2004CB719500), and the Ministry of Science and Technology of China (2006AA06Z379, 2006DFA52710).

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Authors and Affiliations

  1. Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

    Hong-Yuan Hao, Chen-Xu He, Bao-Zhu Tian & Jin-Long Zhang

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  1. Hong-Yuan Hao
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  2. Chen-Xu He
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  3. Bao-Zhu Tian
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  4. Jin-Long Zhang
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Correspondence to Jin-Long Zhang.

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Hao, HY., He, CX., Tian, BZ. et al. Study of photocatalytic activity of Cd-doped mesoporous nanocrystalline TiO2 prepared at low temperature. Res Chem Intermed 35, 705–715 (2009). https://doi.org/10.1007/s11164-009-0092-y

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