| 蔡莉,张姝.树叶为模版制备网状TiO2和Fex/TiO2及光催化活性研究[J].分子催化,2012,(4):347-355 |
| 树叶为模版制备网状TiO2和Fex/TiO2及光催化活性研究 |
| Leaf as a template for reticular TiO2 and Fex/TiO2: Synthesis, characterization and photo-catalytic activities |
| 投稿时间：2012-04-06 修订日期：2012-07-26 |
| DOI： |
| 中文关键词: 网状TiO2 Fex/TiO2 模板法 树叶 光催化 |
| 英文关键词:reticular TiO2, Fex/TiO2, template method, leaf, photo-catalysis |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 以梧桐树叶为模板制备了具有网状结构的TiO2和Fex/TiO2光催化材料。通过扫描电镜(SEM)、X-射线衍射(XRD)、分子荧光发射光谱(PL)、紫外-可见吸收光谱(UV-Vis)等对这两类光催化材料的结构和物理性能进行了表征。结果表明，以树叶为模板制得的Fe0.005/TiO2呈网状结构。在600- 800℃范围内，随煅烧温度的升高，网状TiO2和Fe0.005/TiO2中锐钛型TiO2的含量减少，Fe3 的掺杂能促进锐钛型向金红石型的转变。与Degussa P25相比，网状TiO2和Fex/TiO2的分子荧光光谱强度明显减弱，光生电子-空穴对的复合情况得到改善；吸收光谱范围明显红移，禁带宽度有不同程度的缩小。孔雀石绿的光催化降解实验表明，网状TiO2和Fex/TiO2具有比Degussa P25更强的催化活性。光催化活性的稳定性研究表明，网状Fe0.005/TiO2具有良好的稳定性，能多次重复使用。 |
| 英文摘要: |
| The reticular TiO2 and Fex/TiO2 photo-catalytic materials were prepared by using the leaves of phoenix tree as the template. Their structure and physical properties were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL) and UV-Vis spectroscopy. The results show that the prepared Fe0.005/TiO2 was reticular. When the calcination temperature increases from 600 to 800℃, content of anatase TiO2 in reticular TiO2 and Fe0.005/TiO2 prepared was decreased and doped Fe3 can lead to the transition of anatase to rutile phase. Compared with Degussa P25, the PL intensity of reticular TiO2 and Fex/TiO2 revealed a significant decrease, indicating that they had a low recombination rate of photo-induced electrons and holes. The absorbance wavelength of obtained reticular TiO2 and Fex/TiO2 was red shift and the band gap energy was decreased. The photo-catalytic degradation of malachite green experiments indicated that the photo-catalytic activity of the as-prepared reticular TiO2 and Fex/TiO2 was much higher than that of commercial Degussa P25. Further investigation revealed that reticular Fe0.005/TiO2 has an excellent long-term stability and can be repeated used. |
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