Monodisperse α-Fe2O3 Mesoporous Microspheres: One-Step NaCl-Assisted Microwave-Solvothermal Preparation, Size Control and Photocatalytic Property.

Monodisperse α-Fe2O3 Mesoporous Microspheres: One-Step NaCl-Assisted Microwave-Solvothermal Preparation, Size Control and Photocatalytic Property.
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DOI:
10.1007/s11671-010-9742-7
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发表时间:
2010-08-18
影响因子:
--
通讯作者:
Zhu, Ying-Jie
Zhu, Ying-Jie
中科院分区:
材料科学3区
文献类型:
--
作者:
Cao, Shao-Wen;Zhu, Ying-Jie

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采用NaCl辅助微波溶剂热法一步合成了单分散的α-Fe 2 O3介孔微球。该方法以Fe(NO3)3 ·9 H2O为铁源,聚乙烯吡咯烷酮(PVP)为表面活性剂,在NaCl存在下,在水和乙醇的混合溶剂中进行。在本实验条件下,通过α-Fe 2 O3纳米晶的定向附着,可以形成单分散的α-Fe 2 O3介孔微球。该方法的优点之一是α-Fe 2 O3介孔微球的尺寸可以在约100 ~ 200 μ m范围内调节。170、我的260 nm处,通过改变实验参数。结果表明,不同比表面积的α-Fe 2 O3介孔微球对水杨酸的光催化降解具有较高的活性。
A simple one-step NaCl-assisted microwave-solvothermal method has been developed for the preparation of monodisperse α-Fe2O3 mesoporous microspheres. In this approach, Fe(NO3)3 · 9H2O is used as the iron source, and polyvinylpyrrolidone (PVP) acts as a surfactant in the presence of NaCl in mixed solvents of H2O and ethanol. Under the present experimental conditions, monodisperse α-Fe2O3 mesoporous microspheres can form via oriented attachment of α-Fe2O3 nanocrystals. One of the advantages of this method is that the size of α-Fe2O3 mesoporous microspheres can be adjusted in the range from ca. 170 to ca. 260 nm by changing the experimental parameters. High photocatalytic activities in the degradation of salicylic acid are observed for α-Fe2O3 mesoporous microspheres with different specific surface areas.
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