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首页> 外文期刊>RSC Advances >Hierarchically ordered macro-mesoporous anatase TiO2 prepared by pearl oyster shell and triblock copolymer dual templates for high photocatalytic activity
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Hierarchically ordered macro-mesoporous anatase TiO2 prepared by pearl oyster shell and triblock copolymer dual templates for high photocatalytic activity

机译：由珍珠牡蛎壳和三嵌段共聚物双模板制备的分层排序的宏观介孔锐钛矿TiO2，用于高光催化活性

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摘要

Hierarchically ordered macro-mesoporous anatase TiO2 is prepared by combining the supramolecular-templating self-assembly of amphiphilic triblock copolymer P123 with a natural pearl oyster shell in a hard-templating process by a facile sol-gel reaction. The obtained materials are characterized by Raman spectroscopy, X-ray diffraction, N-2 adsorption-desorption analysis, scanning electron microscopy, and transmission electron microscopy. The results demonstrate that all TiO2 materials obtained after calcination at various temperatures are in the anatase phase, and interestingly the resultant ordered structure of both macropores and mesopores are well-preserved after calcination at 350 degrees C or 450 degrees C, with the walls of macropores composed of ordered mesopores. However, upon calcination at 550 degrees C or 650 degrees C, while the ordered macroporous structures remain well-preserved, the mesoporous structures collapse. The photocatalytic activities of the resulting TiO2 materials are also evaluated by photodegradation of rhodamine B under UV light irradiation. The prepared TiO2 calcined at 450 degrees C shows the highest photocatalytic activity.
机译：超分子-模板化与由容易溶胶 - 凝胶反应在硬模板化处理的天然珍珠色牡蛎壳的自组装的两亲性的三嵌段共聚物P123分级排序宏观孔锐钛矿TiO 2通过组合制备。所得材料的特征在于拉曼光谱，X射线衍射，N-2吸附 - 解吸分析，扫描电子显微镜和透射电子显微镜。结果表明，在各种温度下煅烧后获得的所有TiO2材料都在锐钛矿相中，有趣的是，在350℃或450摄氏度下煅烧后，Macropores和中孔的所得有序结构在350℃或450摄氏度下煅烧由订购的中索组成。然而，在550℃或650℃的煅烧时，虽然有序的大孔结构保持完全保存，所以中孔结构塌陷。通过UV光照射下的罗丹明B光降解，还通过光降解来评估所得TiO2材料的光催化活性。在450℃下煅烧的制备的TiO 2显示出最高的光催化活性。

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  • 来源
    《RSC Advances》 |2018年第67期|共9页
  • 作者

    Zhao Jianquan; Liao Chanjuan; Chen Xia; Song Wulin;

  • 作者单位

    Huazhong Univ Sci &

    Technol Analyt &

    Testing Ctr Wuhan 430074 Hubei Peoples R China;

    Hunan Agr Univ Coll Resources &

    Environm Changsha 410128 Hunan Peoples R China;

    Huazhong Univ Sci &

    Technol Analyt &

    Testing Ctr Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci &

    Technol Analyt &

    Testing Ctr Wuhan 430074 Hubei Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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