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首页> 外文期刊>RSC Advances >Large-scale synthesis of stable mesoporous black TiO2 nanosheets for efficient solar-driven photocatalytic hydrogen evolution via an earth-abundant low-cost biotemplate
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Large-scale synthesis of stable mesoporous black TiO2 nanosheets for efficient solar-driven photocatalytic hydrogen evolution via an earth-abundant low-cost biotemplate

机译：大规模合成稳定的介孔黑TiO2纳米片，用于通过地球丰富的低成本Biotemplate提供高效的太阳能光催化氢化氢气进化

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摘要

Stable mesoporous black anatase TiO2 nanosheets (MBTNs) are synthesized via an earth-abundant low-cost biotemplate method combined with an ethanediamine encircling process, and subsequent high-temperature calcinations and surface hydrogenation. The MBTNs, which can be synthesized on a large scale with a low cost, are composed of Ti3+ in frameworks and surface disorders. In this case, the employment of ethanediamine encircling plays a vital role in fabricating the stable MBTNs, and not only favors high-temperature hydrogenation (600 degrees C), but also retains the mesoporous network as well as inhibiting the anatase-to-rutile phase transformation and grain growth. The resultant MBTNs possess a relatively high surface area of similar to 74 m(2) g(-1), and large pore size and pore volume of similar to 10 nm and 0.15 cm(3) g(-1), respectively. The MBTNs, with a narrow bandgap of similar to 2.85 eV, can extend the photoresponse from the ultraviolet to visible light region, and exhibit an excellent solar-driven photocatalytic hydrogen evolution rate (similar to 165 mu mol h(-1) 0.05 g(-1)), which is about twice as high as that of pristine mesoporous TiO2 nanosheets (similar to 82 mu mol h(-1) 0.05 g(-1)). This efficient solar-driven photocatalytic hydrogen evolution is ascribed to the synergistic effects of the highly crystalline, ultrathin 2D mesoporous structure of Ti3+ in frameworks and surface disorders.
机译：稳定的介孔黑色锐钛矿TiO2纳米蛋白酶（MBTNS）通过与乙基二胺环环加工过程结合的土壤丰富的低成本Biotemplate方法合成，以及随后的高温煅烧和表面氢化。可以以低成本的大规模合成的MBTN由Ti3 +在框架和表面障碍中组成。在这种情况下，乙二胺内的使用在制造稳定的MBTN方面发挥着至关重要的作用，而且不仅有利于高温氢化（600℃），而且还保留了中孔网络以及抑制锐钛矿对金红石相的作用转型和籽粒生长。得到的MBTN具有相对高的表面积，类似于74m（2 )g（-1），并且分别具有与10nm和0.15cm（3 )g（-1）的大的孔径和孔体积。具有与2.85eV类似的窄带隙的MBTN可以将来自紫外线的光响应扩展到可见光区域，并且具有出色的太阳能光催化氢进化率（类似于165μmolH（-1）0.05g（ -1）），其大约是原始介孔TiO2纳米片的两倍（类似于82μmolH（-1）0.05g（-1））。这种高效的太阳能光催化氢气进化归因于骨架和表面疾病中Ti3 +的高晶体，超薄2D中孔结构的协同作用。

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  • 来源
    《RSC Advances》 |2016年第56期|共7页
  • 作者

    Zhang Kaifu; Zhou Wei; Zhang Xiangcheng; Qu Yang; Wang Lei; Hu Weiyao; Pan Kai; Li Mingxia; Xie Ying; Jiang Baojiang; Tian Guohui;

  • 作者单位

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

    Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China;

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