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Titania Polyhedra via Sodium Fluorotitanate Intermediates

机译：钛白粉通过氟钛酸钠中间体

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摘要

Chemical reactions of a metallic Ti plate with H_2O_2 solution, which contained NaF and HNO_3 at 80℃, were found to result in sodium fluorotitanate polyhedra after 2 hours. A subsequent calcination produced a mixture of NaF and TiO_2. After the removal of NaF by dissolving it in hot water, TiO_2-B polyhedra were successfully achieved, which possessed a high specific surface area of 196.3 m~2/g, pores with an average diameter of 45.7 nm and a total pore volume of 0.448 cm~3/g. The morphology (cube or polyhedron) and crystal structure (TiO_2-B or anatase) of the resultant titania crystals can be controlled through simply varying the reaction time of the Ti plates in the H_2O_2 solution. Despite the high specific surface area, the TiO_2-B polyhedra exhibited an activity to assist photodegradation of rhodamine B in water inferior to that of the commercial photocatalyst P25.
机译：发现金属钛板在80℃下与含有NaF和HNO_3的H_2O_2溶液发生化学反应，会在2小时后生成氟钛酸钠多面体。随后的煅烧产生了NaF和TiO 2的混合物。将NaF溶于热水中去除后，成功制得了TiO_2-B多面体，其比表面积高196.3 m〜2 / g，孔的平均直径为45.7 nm，总孔体积为0.448厘米〜3 /克。可以通过简单地改变H_2O_2溶液中Ti板的反应时间来控制所得二氧化钛晶体的形态（立方或多面体）和晶体结构（TiO_2-B或锐钛矿）。尽管具有高的比表面积，但是TiO_2-B多面体仍表现出比水中的商业光催化剂P25低的辅助罗丹明B在水中的光降解的活性。

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  • 来源
    《Science of advanced materials》 |2012年第7期|p.719-726|共8页
  • 作者

    Jin-Ming Wu; Yu-Qing Zhang; Hong-Xing Xue; Guo-Hua Bai; Lu-Lu Lai; Ming-Zao Tang;

  • 作者单位

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

    State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    titanium dioxide; oxidation; photocatalysis; polyhedra;

    机译：二氧化钛;氧化光催化多面体;

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