Synthesis and enhanced photocatalytic activity of monodisperse flowerlike nanoarchitectures assembled from CdS nanoflakes with exposed {0 0 1} facets

Synthesis and enhanced photocatalytic activity of monodisperse flowerlike nanoarchitectures assembled from CdS nanoflakes with exposed {0 0 1} facets
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由具有暴露的{0 0 1}面的CdS纳米片组装而成的单分散花状纳米结构的合成和增强的光催化活性

DOI:
10.1016/j.materresbull.2012.08.045
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发表时间:
2012-11
影响因子:
5.4
通讯作者:
Yang, Heqing
Yang, Heqing
中科院分区:
材料科学2区
文献类型:
--
作者:
Jin, Rong;Su, Mingyi;Wang, Jiao;Zhang, Pei;Cui, Meng;Chen, Yan;Yang, Heqing

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以硫化镉(CdCl 2)、硫脲、聚乙烯吡咯烷酮和水为原料,在180°C下水热反应6.0h,制备了直径约0.85μm的单分散花状CdS纳米片。所制备的CdS纳米片具有完美的六边形形状,边长为0.37-0.38μm,厚度为60- 70 nm。由于PVP在具有纤锌矿结构的CdS(001)表面的选择性吸附,由CdS纳米晶组装的球形粒子首先通过定向附着过程演化为由纳米片组装的花状结构。所获得的{001}晶面暴露的CdS花状纳米结构显示出比CdS枝状纳米结构和商业粉末更高的固有光催化活性,用于降解孔雀石绿色。
Monodisperse flowerlike nanoarchitectures assembled from CdS nanoflakes with a diameter of about 0.85μm were synthesized by a hydrothermal reaction of CdCl2with thiocarbamide, polyvinylpyrrolidone and H2O at 180°C for 6.0h. The constituent CdS nanoflakes have perfect hexagonal shape with the side lengths of 0.37–0.38μm and the thicknesses of 60–70nm. Sphere like particles assembled from CdS nanocrystals formed firstly evolved into flowerlike architectures assembled from nanoflakes via an oriented attachment process due to the selective adsorption of PVP on (001) surface of CdS with the wurtzite structure. The as-obtained CdS flowerlike nanoarchitectures with exposed {001} facets show higher intrinsic photocatalytic activity than CdS branched nanostructures and commercial powders for degradation of malachite green.
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