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无模板剂的溶胶-水热法合成具有可见光响应的氮掺杂混晶 TiO2(锐钛矿/金红石/板钛矿)纳米棒束
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1.内蒙古自治区工业催化重点实验室;2.江苏大学 绿色化学与化工技术研究院

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Template-free Sol-hydrothermal Synthesis of a Nitrogen Doped Anatase/rutile/brookite TiO2 Nano-rod Bundle for Visible Light Driven Photocatalysis
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1.School of Chemical Engineering,Inner Mongolia University of Technology;2.Institute of Green Chemistry and Chemical Technology,Jiangsu University

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    摘要:

    采用无模板剂的溶胶-水热法制备了具有可见光响应的N掺杂锐钛矿/金红石/板钛矿型TiO2(N-TiO2)纳米棒束,并利用X射线衍射(XRD)、透射电镜(TEM)、紫外-可见光漫反射光谱(UV-Vis DRS)、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)等手段对获得的样品进行了表征。以甲基橙为模型反应物,评价了N-TiO2纳米棒束的光催化活性。表征结果结合光催化活性评价结果显示,与P25-TiO2相比,N掺杂、混晶及纳米棒束之间的协同作用是所制备的混晶N-TiO2纳米棒束具有良好光催化活性的主要原因,并对混晶N-TiO2纳米棒束光催化降解甲基橙的机理进行了探讨。

    Abstract:

    Nitrogen doped anatase/rutile/brookite titanium dioxide (N-TiO2) regular nano-rod bundle photocatalyst for improving visible light photocatalytic activity was prepared through a template-free sol-hydrothermal method. The properties of the materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Photocatalytic degradation of methyl orange (MO) in an aqueous solution under visible light irradiation was used as a probe reaction to evaluate the photocatalytic activity of the mixed-phase N-TiO2 nano-rod bundle. The results of characterization combined with photocatalytic activity of MO photodegradation showed that the synergistic effects among N doping, mixed-phase and nano-rod bundle structure were the main reason to improve photocatalytic activity of mixed-phase N-TiO2 nano-rod bundle compared with P25-TiO2. The possible mechanism of MO degradation by mixed phase N-TiO2 nano-rod bundle photocatalyst was preliminarily discussed.

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刘正江,鲍晓丽,邢磊,杨桔材,张前程.无模板剂的溶胶-水热法合成具有可见光响应的氮掺杂混晶 TiO2(锐钛矿/金红石/板钛矿)纳米棒束[J].稀有金属材料与工程,2019,48(1):77~84.[Liu Zhengjiang, Bao Xiaoli, Xing Lei, Yang Jucai, Zhang Qiancheng. Template-free Sol-hydrothermal Synthesis of a Nitrogen Doped Anatase/rutile/brookite TiO2 Nano-rod Bundle for Visible Light Driven Photocatalysis[J]. Rare Metal Materials and Engineering,2019,48(1):77~84.]
DOI:10.12442/j. issn.1002-185X.20170606

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  • 收稿日期:2017-07-10
  • 最后修改日期:2017-09-07
  • 录用日期:2017-09-11
  • 在线发布日期: 2019-02-18
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