PEG-Assisted Hydrothermal Synthesis and Photocatalytic Activity of Bi2Fe4O9 Crystallites
PEG-Assisted Hydrothermal Synthesis and Photocatalytic Activity of Bi2Fe4O9 Crystallites
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DOI：
10.1557/opl.2011.527
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Dengrong Cai;Jianmin Li;S. Bu;Shengwen Yu;D. Jin;Jinrong Cheng
中科院分区：
文献类型：
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作者：
Dengrong Cai;Jianmin Li;S. Bu;Shengwen Yu;D. Jin;Jinrong Cheng
利用聚乙二醇(PEG) 400辅助的简便水热路线合成单相Bi 2 Fe 4 O 9 微晶。 X射线衍射结果表明，PEG 400浓度为30 g/L的产物呈现出沿(001)面的择优生长。透射电子显微镜表明，所制备的含有PEG 400的Bi 2 Fe 4 O 9 微晶的形貌为片状和棒状。通过紫外-可见漫反射光谱(UV-DRS)表征了产品在可见光区域的强吸收。评价了Bi 2 Fe 4 O 9 微晶在可见光照射下降解甲基橙(MO)的光催化活性。照射3小时，在少量H 2 O 2 的帮助下，降解率提高至93%。 FT-IR光谱分析证明Bi 2 Fe 4 O 9 催化剂在光催化反应后保持稳定。
A facile hydrothermal route assisted by polyethylene glycol (PEG) 400 was utilized to synthesize single-phase Bi 2 Fe 4 O 9 crystallites. X-ray diffraction results showed the products with PEG 400 of 30 g/L exhibited a preferred growth along the (001) plane. Transmission electron microscopy indicated that the morphology of the as-prepared Bi 2 Fe 4 O 9 crystallites with PEG 400 were plake-like and rod-like. Strong absorption in visible-light region of the products was characterized by UV-vis diffuse reflectance spectrum (UV-DRS). The photocatalytic activity of Bi 2 Fe 4 O 9 crystallites was evaluated on degradation of methyl orange (MO) under visible light irradiation. For 3 h irradiation, the degradation ratio was increased to 93% with the aid of a small amount of H 2 O 2 . The analysis of FT-IR spectra proved that the Bi 2 Fe 4 O 9 catalysts were remained stable after the photocalytic reactions.