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铝热还原法制备Magnéli相亚氧化钛及其可见光光催化活性研究
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1.四川省钒钛工程技术研究中心;2.攀枝花学院

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四川省科技支撑项目


A novel route for preparation of Magnéli titanium suboxides by aluminothermic reductionand their photocatalytic activity under visible light
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Panzhihua University,International Research Institute of Vanadium and Titanium

Fund Project:

Science and Technology Support Program of Sichuan

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    摘要:

    采用铝热还原-盐酸酸洗工艺成功制备了Magnéli相亚氧化钛,通过X-ray diffraction (XRD), Scanning electron microscopy (SEM),UV-visible diffuse reflectance spectroscopy (UV-Vis DRS) 和X-ray photoelectron spectroscopy(XPS)等手段进行表征表明:在焙烧温度950℃,焙烧时间20min,Al/TiO2=0.2时,成功制备以Ti4O7为主要物相的Magnéli相亚氧化钛材料,其粒径为400~600nm,样品表面形成了大量的氧空位,表现出很强的紫外和可见光吸收性能。在可见光条件下光照130min时,950℃焙烧20min,25min和35min条件下制备并酸洗后的Magnéli相亚氧化钛降解亚甲基蓝的效率分别达到37%,43%和62%。

    Abstract:

    Magnéli-phases titanium suboxides have been successfully prepared by our aluminum reduction-hydrochloric acid leaching route. The resulting sample was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS) and X-ray photoelectron spectroscopy(XPS).The Characterization results show that the mother phase was Ti4O7 of magnéli phase titanium oxide could be prepared at the calcination temperature of 950°C,roasting time for 20 min and the amount of aluminum was 0.2.The as-prepared magnéli-phase titanium suboxides samples with the diameters of 400~600nm, the surface of magnéli-phase titanium suboxides formation of oxygen vacancies, which has strong UV and visible-light absorption property. The degradation efficiency of 37%, 43%, and 62% was achieved for the as-prepared magnéli-phase titanium suboxides samples after visible light irradiation for 130min.

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李军,吴恩辉,侯静,黄平,蒋燕,徐众,刘黔蜀.铝热还原法制备Magnéli相亚氧化钛及其可见光光催化活性研究[J].稀有金属材料与工程,2020,49(7):2281~2288.[Li Jun, Wu Enhui, Hou Jing, Jiang Yan, Huang Ping, Xu Zhong, Liu Qianshu. A novel route for preparation of Magnéli titanium suboxides by aluminothermic reductionand their photocatalytic activity under visible light[J]. Rare Metal Materials and Engineering,2020,49(7):2281~2288.]
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  • 收稿日期:2019-04-12
  • 最后修改日期:2019-07-02
  • 录用日期:2019-07-24
  • 在线发布日期: 2020-08-31
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