Biogenic N-I-codoped TiO2 photocatalyst derived from kelp for efficient dye degradation
Biogenic N-I-codoped TiO2 photocatalyst derived from kelp for efficient dye degradation
复制标题
来自海带的生物 N-I 共掺杂 TiO2 光催化剂可有效降解染料
DOI：
10.1039/c0ee00363h
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发表时间：
2011-01-01
影响因子：
32.5
通讯作者：
Zhu, Hanxing
中科院分区：
文献类型：
--
作者：
Shi, Nan;Li, Xiaohui;Zhu, Hanxing
为了缓解全球能源和环境问题，需要设计和制造高效、具有成本效益的光催化剂。在本文中，我们已经获得了一个简单的一步渗透过程中，可以很好地复制从宏观到纳米尺度的海带层次结构的生物-TiO 2光催化剂。此外，氮和碘，包含在原始植物体，自掺杂到所得的样品。紫外-可见漫反射光谱表明，生物TiO 2具有高效的捕光能力，尤其是在400 ~ 550 nm范围内，并且由于自掺杂，其带隙吸收边较普通N-TiO 2有明显的红移。在太阳光照射下降解亚甲基蓝的光催化活性表明，生物源TiO 2具有良好的光催化性能。本研究为进一步利用海带结构合成高性能光催化剂提供了理论依据，也为利用天然植物和生物材料开发利用太阳能提供了新的途径。
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.