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Issue 1, 2011
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Biogenic N-I-codoped TiO2 photocatalyst derived from kelp for efficient dye degradation

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Abstract

The design and fabrication of efficient, cost-effective photocatalysts are required in order to ease global energy and environmental issues. In this paper, we have obtained a biogenic-TiO2 photocatalyst through a simple one step infiltration process which can replicate well the hierarchical architecture of kelp from the macro- down to the nano-scale. In addition, the nitrogen and iodine, contained in the original plant corpus, are self-doped into the resulting samples. UV-Visible diffuse reflectance spectra of the biogenic-TiO2 indicate that it has efficient light-harvesting capacity, especially in the region from 400 nm to 550 nm, and compared with the common N-TiO2, its band gap absorption edge exhibits a clear red shift due to the self-doping. Moreover, the biogenic-TiO2 possesses excellent photocatalytic properties proved by the photocatalytic activity of methylene blue degradation under solar energy irradiation. This work may provide the inspiration for the synthesis of further high performance photocatalysts based on the kelp structure and a new methodology for application of nature's plants and utilization of solar energy with biogenic materials.

Graphical abstract: Biogenic N-I-codoped TiO2 photocatalyst derived from kelp for efficient dye degradation

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Publication details

The article was received on 18 Aug 2010, accepted on 22 Sep 2010 and first published on 12 Nov 2010


Article type: Paper
DOI: 10.1039/C0EE00363H
Energy Environ. Sci., 2011,4, 172-180

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    Biogenic N-I-codoped TiO2 photocatalyst derived from kelp for efficient dye degradation

    N. Shi, X. Li, T. Fan, H. Zhou, J. Ding, D. Zhang and H. Zhu, Energy Environ. Sci., 2011, 4, 172
    DOI: 10.1039/C0EE00363H

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