Synthesis, Characterization, and Photocatalytic Activity of Zn-Doped SnO2 Hierarchical Architectures Assembled by Nanocones
Synthesis, Characterization, and Photocatalytic Activity of Zn-Doped SnO2 Hierarchical Architectures Assembled by Nanocones
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DOI：
10.1021/jp9021272
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发表时间：
2009-05-28
影响因子：
3.7
通讯作者：
Zhang, Qingjie
中科院分区：
文献类型：
--
作者：
Jia, Tiekun;Wang, Weimin;Zhang, Qingjie
采用无表面活性溶剂热法在乙二胺、乙醇和去离子水的混合溶剂中合成了具有纳米花状、纳米红素和纳米海参形态的锌掺杂SnO2分级结构。场发射扫描电子显微镜和透射电子显微镜的观察表明，由直径为20~60 nm的纳米锥组装而成的锌掺杂SnO2具有不同形貌的层次结构。我们发现溶液的碱用量(NaOH)对合成产物的形貌有显著的影响。随着纳米锥尺寸的减小，掺锌SnO2的紫外可见光谱发生蓝移。通过对RhB水溶液的降解来评价掺锌SnO2的光催化活性，结果表明具有海胆状形貌的SnO2样品具有较高的光催化活性。此外，还详细研究了掺锌SnO(2)催化剂对RhB的降解过程。
Zn-doped SnO2 hierarchical architectures with nanoflower, nanourchin, and nanotrepang morphologies have been synthesized with a surf actant-free solvothermal synthesis route in the mixed solvents of ethylenediamine (En), ethanol, and deionized water. The observations of field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) showed that Zn-doped SnO2 hierarchical architectures with different morphologies were assembled by the nanocones with diameters ranging from 20 to 60 nm. We found that the alkaline dosage (NaOH) of the solution had a remarkable effect on the morphology of as-synthesized products. The UV-visible spectra of Zn-doped SnO2 hierarchical architectures exhibited a blue shift with the decrease of the size of nanocones. The photocatalytic activity of Zn-doped SnO2 samples were evaluated by the degradation of RhB aqueous solution, and the results revealed that the sample with urchin morphology had high photocatalytic activity efficiency. Moreover, the degradation process of RhB induced by Zn-doped SnO(2)catalyst was investigated in detail as well.