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Double-Shelled TiO_2 Hollow Spheres Assembled with TiO_2 Nanosheets

机译：用TiO_2纳米片组装双壳TiO_2空心球

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摘要

High-quality double-shelled TiO_2 hollow spheres (DHS-Ti) assembled with TiO_2 nanosheets have been synthesized for the first time through a simple hydrothermal treatment of sSiO_2@TiO_2 (TiO_2-coated solid SiO_2 spheres). The double-shelled structure shows a high BET surface area up to 417.6 m~2g~(-1). Anatase DHS-Ti of high crystallinity can be obtained without structural collapse by calcination treatment. The effects of cetyl trimethylammonium bromide (CTAB) concentration, pH, and hydrothermal reaction temperature have also been investigated with a series of contrast experiments. A formation mechanism involving the in situ growth of amorphous TiO_2 nanosheets followed by the redeposition of dissolved silica species is proposed. Lastly, the DHS-Ti forming strategy can be extended as a general strategy to fabricate various morphological hollow nanostructures and double-shelled Pt nanocatalysts by rationally selecting functional sSiO_2 nanoparticles as core materials. This work could open up a new strategy for controllable synthesis of complex hollow structures and other functional materials.
机译：通过SSIO_2 @ TiO_2（TiO_2涂覆的固体SiO_2球体的简单水热处理，首次合成了与TiO_2纳米蛋白酶组合的高质量双壳TiO_2空心球（DHS-TI）。双壳结构显示出高达417.6 m〜2g〜（-1）的高白表面积。可以获得高结晶度的锐钛矿DHS-TI，而无需通过煅烧处理结构塌陷。还研究了一系列对比试验，研究了十六烷基三甲基溴化铵（CTAB）浓度，pH和水热反应温度的影响。提出了涉及无定形TiO_2纳米片的原位生长的形成机制，然后进行重新沉积溶解的二氧化硅物质。最后，通过合理选择功能性SsiO_2纳米颗粒作为核材料，可以将DHS-Ti形成策略扩展为制造各种形态空心纳米结构和双壳PT纳米催化剂。这项工作可以开辟复杂空心结构和其他功能材料的可控合成的新策略。

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  • 来源
    《Chemistry: A European journal》 |2017年第18期|共8页
  • 作者

    Chao Zhang; Yuming Zhou; Yiwei Zhang; Shuo Zhao; Jiasheng Fang; Xiaoli Sheng; Tao Zhang; Hongxing Zhang;

  • 作者单位

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

    School of Chemistry and Chemical Engineering Southeast University Jiangsu Optoelectronic Functional Materials and Engineering Laboratory Nanjing 211189 (P. R. China) Fax: (+86) 25-52090617;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    double-shelled hollow spheres; hydrothermal treatment; mesoporous SiO_2; nanosheets; nanostructures; TiO_2;

    机译：双壳空心球;水热处理;中孔SiO_2;纳米蛋白酶;纳米结构;TiO_2;

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