Effect of metal-support interaction on the structural and enhanced photocatalytic performance of mesoporous M–TiO2/SBA-16 (M = Ag and Fe)
Effect of metal-support interaction on the structural and enhanced photocatalytic performance of mesoporous M–TiO2/SBA-16 (M = Ag and Fe)
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DOI：
10.1007/s10934-016-0235-7
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发表时间：
2017-02
影响因子：
2.6
通讯作者：
Jing Ma;Shangyuan Xu;Jia Chu;J. Xue;Jie-Yinn Tang;L. Qiang
中科院分区：
文献类型：
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作者：
Jing Ma;Shangyuan Xu;Jia Chu;J. Xue;Jie-Yinn Tang;L. Qiang
本文采用湿法浸渍法制备了一系列金属负载的二氧化钛/SBA-16光催化剂。用X射线衍射仪、拉曼光谱、氮气吸附-脱附、透射电子显微镜、紫外-可见吸收光谱和X射线光电子能谱对合成的样品进行了表征。结果表明，改性后的SBA-16保持了有序的介观结构。结果表明，负载不同的金属元素对材料的晶体结构和物理性能有显著影响。此外，还对制备的材料进行了光降解罗丹明B(RhB)的评价。实验结果表明，这些催化剂对RhB的降解符合准一级动力学模型。金属元素对光催化活性的影响可以归因于适量的金属浓度可以通过减少电子-空穴复合而增强光电流，从而提高光催化反应的效率。
In this paper, a series of metal supported TiO2/SBA-16 photocatalysts were successfully synthesized by wet impregnation method. The synthesized samples were characterized by X-ray diffraction (XRD), Raman spectra, N2adsorption–desorption, transmission electron microscopy (TEM), UV–visible absorption spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). It was found that SBA-16 retained the ordered mesostructure after modification. The results shown that loading different metal elements was found to have significant influences on the crystallographic structure and physical properties. Moreover, the prepared materials were evaluated on photodegradation of Rhodamine B (RhB). Experiment results showed that the degradation of RhB by these catalysts follows the pseudo-first-order kinetic model. The effect of metal element on photocatalytic activity can be attributed that the appropriate amounts of metal concentration can enhance the photocurrent due to the reduced electron–hole recombination, which can improve the efficiency of photocatalytic reactions.