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首页> 外文期刊>Optical Materials >Effects of optical band gap energy, band tail energy and particle shape on photocatalytic activities of different ZnO nanostructures prepared by a hydrothermal method
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Effects of optical band gap energy, band tail energy and particle shape on photocatalytic activities of different ZnO nanostructures prepared by a hydrothermal method

机译：带隙能，带尾能和颗粒形状对水热法制备的不同ZnO纳米结构光催化活性的影响

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摘要

The dependence of the crystallite size and the band tail energy on the optical properties, particle shape and oxygen vacancy of different ZnO nanostructures to catalyse photocatalytic degradation was investigated. The ZnO nanoplatelets and mesh-like ZnO lamellae were synthesized from the PEO19-b-PPO3 modified zinc acetate dihydrate using aqueous KOH and CO(NH2)(2) solutions, respectively via a hydrothermal method. The band tail energy of the ZnO nanostructures had more influence on the band gap energy than the crystallite size. The photocatalytic degradation of methylene blue increased as a function of the irradiation time, the amount of oxygen vacancy and the intensity of the (0002) plane. The ZnO nanoplatelets exhibited a better photocatalytic degradation of methylene blue than the mesh-like ZnO lamellae due to the migration of the photoelectrons and holes to the (0001) and (000-1) planes, respectively under the internal electric field, that resulted in the enhancement of the photocatalytic activities. (C) 2016 Elsevier B.V. All rights reserved.
机译：研究了微晶尺寸和带尾能量对不同ZnO纳米结构的光学性质，颗粒形状和氧空位的催化光催化降解性能。分别使用KOH和CO（NH2）（2）水溶液通过水热法从PEO19-b-PPO3改性的醋酸锌二水合物合成ZnO纳米片和网状ZnO薄片。 ZnO纳米结构的带尾能量比微晶尺寸对带隙能量的影响更大。亚甲基蓝的光催化降解随辐照时间，氧空位量和（0002）平面强度的增加而增加。由于光电子和空穴分别在内部电场下迁移至（0001）和（000-1）平面，因此ZnO纳米片展现出比网状ZnO薄片更好的亚甲基蓝光催化降解。增强光催化活性。 （C）2016 Elsevier B.V.保留所有权利。

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