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首页> 外文期刊>Chemistry: A European journal >A Strategy for Breaking Polyoxometalate-based MOFs To Obtain High Loading Amounts of Nanosized Polyoxometalate Clusters to Improve the Performance of Dye-sensitized Solar Cells
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A Strategy for Breaking Polyoxometalate-based MOFs To Obtain High Loading Amounts of Nanosized Polyoxometalate Clusters to Improve the Performance of Dye-sensitized Solar Cells

机译：用于破坏基于多氧酸酯的MOF的策略，得到高负荷量的纳米化多氧化簇簇，以改善染料敏化太阳能电池的性能

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摘要

Polyoxometalates (POM) have already been confirmed to act as effective electron-transfer mediators for improving the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs) based on previous studies. However, the improvement may be limited by the agglomeration of the polyoxoanions. In this paper, the previous synthesis strategy is improved upon by breaking the metal-organic frameworks (MOFs) with POMs as the secondary building units ([Ni(bpp)(H_2O)_2]3[P_2W_(18)O_(62)]·24H_2O (1) (bpp=1,3-bis(4-pyridyl)propane) and H_6[Cu_3(H_2O)_6(P_2W_(18)O_(62))_2(3-dpye)6]·28H_2O (2) (3-dpye=N,N'-bis(3-pyridinecarboxamide)-1,2-ethane)) to design and synthesize small sized and highly disperse POM nanoparticles by means of compositing with TiO_2, through calcination to remove the organic ligand. TEM and element mapping confirm that P_2W_(18)O_(62) 6-(denoted as P_2W_(18)) nanoparticles with the diameter of ≈1 nm are uniformly distributed in TiO_2 composites. The loading amount (wt.%) of POM in MOFs reaches 75.67 %. The small sized and highly disperse P_2W_(18) nanoparticles may provide more active sites and specific surface areas for improving the PCE of DSSCs. Finally, the investigations indicate that the PCE of composite P_2W_(18)·NiO-TiO_2 photoanodes is up to 7.56 %, which was 26% higher than the pristine TiO_2 based photoanodes.
机译：已经证实过多氧化物素（POM）作为提高基于先前研究的用于提高染料敏化太阳能电池（DSSCs）的功率转化效率（PCE）的有效电子转移介质。然而，改善可能受到聚氧化的附聚的限制。在本文中，通过将金属有机框架（MOF）与POM分解为二级建筑单元（[Ni（BPP）（H_2O）_2] 3 [P_2W_（18）O_（62）]，改善了先前的合成策略·24H_2O（1）（BPP = 1,3-双（4-吡啶基）丙烷）和H_6 [CU_3（H_2O）_6（P_2W_（18）O_（62））_ 2（3-DPYE）6]·28H_2O（2 ）（3-DPYE = N，N'-BIS（3-吡啶羧酰胺）-1,2-乙烷））通过与TiO_2合成，通过煅烧来设计和合成小尺寸和高度分散的POM纳米颗粒以除去有机配体。 TEM和元素映射确认，P_2W_（18）O_（62）6-（表示为P_2W_（18）），其具有直径为≈1nm的纳米颗粒在TiO_2复合材料中均匀地分布。 MOF中的POM的装载量（WT。％）达到75.67％。小尺寸和高度分散的P_2W_（18）纳米颗粒可以提供更多的活性位点和特定表面积，用于改善DSSC的PCE。最后，调查表明复合P_2W_（18）·NIO-TiO_2光电码的PCE高达7.56％，比基于原始TiO_2的光耦合高出26％。

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  • 来源
    《Chemistry: A European journal》 |2017年第37期|共8页
  • 作者

    Xiaotao Zheng; Weilin Chen; Li Chen; Yijing Wang; Xiangwei Guo; Jiabo Wang; Enbo Wang;

  • 作者单位

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

    Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University Changchun Jilin 130024 (P. R. China);

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

    dye-sensitized solar cells; high dispersion; nanoparticles; photoanode; polyoxometalates;

    机译：染料敏化太阳能电池;高分散;纳米颗粒;光电码;多氧化物;

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