Synthesis of ZrO2:Fe nanostructures with visible-light driven H2 evolution activity

Synthesis of ZrO2:Fe nanostructures with visible-light driven H2 evolution activity
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具有可见光驱动的析氢活性的 ZrO2:Fe 纳米结构的合成

DOI:
10.1039/c4ta05931j
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发表时间:
2015-01
影响因子:
11.9
通讯作者:
Zhizhen Ye
Zhizhen Ye
中科院分区:
材料科学2区
文献类型:
--
作者:
Mu Xiao;Yaguang Li;Yangfan Lu;Zhizhen Ye

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本文采用模板法制备了Fe掺杂量精确可控的ZrO_2:Fe纳米结构。表征结果表明,所制备的样品具有空心球的形貌和较高的结晶质量。此外,ZrO2:Fe纳米结构的带隙可以通过控制Fe含量来容易地调节。此外,密度泛函理论(DFT)的计算表明,在带隙中的杂质带的形成缩小了Fe掺杂的ZrO 2纳米结构的带隙。Fe杂质的掺杂可以显著提高ZrO2纳米结构的可见光催化活性。这可以归因于吸收边的红移和ZrO2:Fe纳米结构的捕获效应。该研究结果为合成不同类型的可见光催化剂提供了一种通用有效的方法。
In this paper, the ZrO2:Fe nanostructures with precisely controlled Fe doping contents are obtained by using a template method. The characterizations obviously show that the as-prepared samples have hollow sphere-like morphology and high crystalline quality. Furthermore, the band gap of the ZrO2:Fe nanostructures is facilely tunable by controlling the Fe content. In addition, the density-functional theory (DFT) calculation reveals that the formation of an impurity band in the band gap narrows the band gap of the Fe-doped ZrO2 nanostructures. The visible-light driven photocatalytic activity of ZrO2 nanostructures could be remarkably enhanced by doping the Fe impurity. This can be attributed to the red shift of the absorption edge and the trapping effect of the ZrO2:Fe nanostructures. The research results provide a general and effective method to synthesize different photocatalysts with enhanced visible-light driven H2 evolution activity.
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