Ultra-fast synthesis and enhanced photocatalytic properties of alpha-Fe2O3/ZnO core-shell structure
Ultra-fast synthesis and enhanced photocatalytic properties of alpha-Fe2O3/ZnO core-shell structure
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DOI：
10.1016/j.matlet.2011.03.026
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发表时间：
2011-06
影响因子：
3
通讯作者：
Wei Yan;H. Fan;Chao Yang
中科院分区：
文献类型：
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作者：
Wei Yan;H. Fan;Chao Yang
采用简单的两步微波水热法合成了纺锤形的α-Fe_2O_3/氧化锌核壳结构。用X射线衍射仪、透射电子显微镜、高分辨电子显微镜和选区电子衍射仪对产物进行了表征。此外，通过对甲基橙溶液的降解测试了其光催化活性。降解结果表明，纺锤形α-Fe_2O_3/氧化锌纳米复合材料在紫外光照射下比纯纺锤形α-Fe_2O_3具有更好的光催化活性(提高3.5倍)。提出了光催化过程中电子被激发的机理。
Spindle-like α-Fe2O3/ZnO core-shell structures were synthesized by a simple two-step method of microwave hydrothermal synthesis. The as-prepared products were characterized by X-ray diffraction, transmission electron microscopy, high-resolution TEM and selected area electron diffraction. Furthermore, photocatalytic activity was measured through the degradation of methyl orange solution. And the results of degradation reveal that the spindle-like α-Fe2O3/ZnO nanocomposites exhibit better photocatalytic activities (3.5 times improvement) than those of the pure spindle-like α-Fe2O3under ultraviolet irradiation. A mechanism was proposed based on which the electrons excited in the photocatalytic process.