Self-assembly and enhanced optical absorption of Bi2WO6 nests via ionic liquid-assisted hydrothermal method

Self-assembly and enhanced optical absorption of Bi2WO6 nests via ionic liquid-assisted hydrothermal method
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离子液体辅助水热法自组装Bi2WO6巢并增强光吸收

DOI:
10.1016/j.matchemphys.2010.01.046
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发表时间:
2010-05
影响因子:
4.6
通讯作者:
Yan, Yongsheng
Yan, Yongsheng
中科院分区:
材料科学3区
文献类型:
--
作者:
Wang, Kun;Xia, Jiexiang;Li, Huaming;Luo, Zhijun;Xu, Hui;Yin, Sheng;Yan, Yongsheng

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以1-丁基-3-甲基咪唑四氟硼酸盐([Bmim] BF 4)为催化剂,采用离子液体辅助水热法成功合成了Bi 2 WO 6纳米晶. Bi_2WO_6分级结构的平均直径约为3-5μm,由尺寸为16 - 20 nm的Bi_2WO_6纳米片组装而成。结果表明,离子液体[Bmim] BF 4对Bi 2 WO 6类巢状分级结构的形成具有重要作用。紫外-可见漫反射光谱表明,Bi 2 WO 6分级嵌套结构在紫外-可见光区的吸光度显著增强,这归因于分级结构内的多次散射,从而延长了光传输的光程。
Bi2WO6uniform hierarchical nest-like structures have been successfully synthesized through an ionic liquid-assisted hydrothermal method in the presence of 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4). The Bi2WO6hierarchical structures have an average diameter of about 3–5μm and are assembled by Bi2WO6nanosheets with size ranging from 16 to 20nm. The results show that ionic liquid [Bmim]BF4is vital for the formation of Bi2WO6nest-like hierarchical structures. The UV–vis diffuse reflectance spectroscopy indicate that Bi2WO6hierarchical nest-like structures induce a significantly enhanced optical absorbance in the UV–vis region, which is ascribed to multiple scattering within the hierarchical assemblies to the lengthened optical path length for light transporting.
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发表时间: 1999-10-01
期刊: CHEMISTRY LETTERS
影响因子: 1.6
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