Controlled Synthesis and Photocatalytic Activity of ZnSe Nanostructured Assemblies with Different Morphologies and Crystalline Phases

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• 作者：Lihui Zhang ; Heqing Yang* ; Jie Yu ; Fanghong Shao ; Li Li ; Fenghua Zhang ; Hua Zhao
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：April 9, 2009
• 年：2009
• 卷：113
• 期：14
• 页码：5434-5443
• 全文大小：675K
• 年卷期：v.113,no.14(April 9, 2009)
• ISSN：1932-7455

文摘

Microspheres constructed from ZnSe nanoparticles with a cubic structure and spherical flowerlike nanoarchitectures assembled from ZnSe(en)_0.5 nanoflakes were synthesized via a solvothermal reaction of ZnCl₂ with Na₂SeO₃ and ethylenediamine in ethylene glycol in the presence of poly(vinylpyrrolidone) at 180 °C for 12 h. Their controlled synthesis is achieved by varying the volume ratio of ethylenediamine to ethylene glycol. Spherical flowerlike nanoarchitectures assembled from ZnSe nanoflakes with a hexagonal structure are obtained by calcining the ZnSe(en)_0.5 in Ar at 350 °C. Their reaction mechanisms and the self-assembly evolution processes are discussed. The photocatalytic activity of the as-prepared products in various geometrical morphologies for the degradation of organic pollutants was studied, and the results indicate that the photocatalytic ability of the ZnSe-spherical flowerlike nanoarchitectures is stronger than that of the ZnSe microspheres.