Synthesis and Characterization of Mobile Crystalline Material-41 Doped with Titanium and Iron
Synthesis and Characterization of Mobile Crystalline Material-41 Doped with Titanium and Iron
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DOI：
10.1260/0263-6174.32.1.13
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发表时间：
2014-01
影响因子：
2.9
通讯作者：
Baojun Lu;Zheng‐Ming Wang;T. Hirotsu
中科院分区：
文献类型：
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作者：
Baojun Lu;Zheng‐Ming Wang;T. Hirotsu
采用直接热合成法合成了Ti掺杂的移动的MCM-41 s（MCM-41 s）和Fe、Ti掺杂的MCM-41 s，并通过X射线衍射、氮吸附和紫外-可见吸收光谱等方法研究了它们的结构和孔性能。结果发现，一个温和的Ti添加条件是需要引入钛物种的二氧化硅壁的框架，而不会失去规则的介孔结构。进一步Fe掺入到Ti掺杂的MCM-41中修改了混合相掺杂结构，并将吸收边移至可见光范围。通过选择合适的合成条件，可以在不牺牲有序介孔性和高比表面积的情况下将Ti和Fe引入MCM-41中，同时大大提高光吸收性能。
Titanium-doped mobile crystalline material-41s (MCM-41s) and Fe- and Ti-doped MCM-41s were synthesized by direct thermal synthesis at moderate Ti and small Fe doping amounts, and their structural and porous properties were examined by X-ray diffraction, nitrogen adsorption, and ultraviolet-visible absorption techniques. It was found that a moderate Ti addition condition is required to introduce Ti species into the framework of silica walls without losing the regular mesoporous structure. Further Fe incorporation into Ti-doped MCM-41 modifies the mixed phase–doped structure and shifts the absorption edge to the visible light range. By appropriately choosing synthesis conditions, it is possible to incorporate both Ti and Fe in MCM-41 without sacrificing the ordered mesoporosity and the high specific surface area while greatly improving the light absorption properties.