Enhanced photocatalytic performance of hierarchical Bi₂O₂CO₃ microflowers by Fe(III) modification

详细信息    查看全文

• 作者：Suqin Liu^a ; ^{liusuqin888@126.com" class="auth_mail" title="E-mail the corresponding author} ; Pengpeng Deng^a ; Gaopeng Dai^a ; ^b ; Ying liang^a ; Shiying Zhang^b
• 关键词：Fe(III) nanocluster ; Bi2O2CO3 ; Photocatalytic ; Interfacial charge transfer
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：42
• 期：8
• 页码：10094-10098
• 全文大小：783 K

文摘

Hierarchical Bi₂O₂CO₃ microflowers with Fe(III) clusters grafted on the surfaces were synthesized through a simple impregnation technique. The as-prepared samples were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by the decomposition of methyl orange in an aqueous solution under visible-light (λ>420 nm) and simulated sunlight illumination. The results show that the Fe(III) clusters are just deposited on the surfaces rather than doped in the lattices of Bi₂O₂CO₃. It is found that the morphologies and crystal structures of Bi₂O₂CO₃ microflowers were not changed after modification of Fe(III) clusters. The photocatalytic activities of the Fe(III)-modified Bi₂O₂CO₃ were markedly increased by the modification of Fe(III) clusters under visible light and simulated sunlight irradiation. The enhanced photocatalytic performance can be attributed to the direct interfacial charge transfer from the valence band of Bi₂O₂CO₃ to the surface Fe(III) clusters, which offer a new channel for the efficient generation of the hole in the valence band of Bi₂O₂CO₃ substrate.