Effect of metal-support interaction on the structural and enhanced photocatalytic performance of mesoporous M–TiO₂/SBA-16 (M = Ag and Fe)

详细信息    查看全文

• 作者：Jing Ma ; Shangyuan Xu ; Jia Chu ; Juanqin Xue ; Jieli Tang…
• 关键词：Metal ; support interaction ; Mesoporous SBA ; 16 ; Photocatalytic performance ; Wet impregnation method
• 刊名：Journal of Porous Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：24
• 期：1
• 页码：45-54
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Characterization and Evaluation of Materials; Physical Chemistry;
• 出版者：Springer US
• ISSN：1573-4854
• 卷排序：24

文摘

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, N₂ adsorption–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.