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首页> 外文期刊>RSC Advances >Encapsulation of tungstophosphoric acid into harmless MIL-101(Fe) for effectively removing cationic dye from aqueous solution
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Encapsulation of tungstophosphoric acid into harmless MIL-101(Fe) for effectively removing cationic dye from aqueous solution

机译：将钨磷酸封装成无害的MIL-101（Fe），以有效地从水溶液中除去阳离子染料

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摘要

A Keggin-type polyoxometalate H3PW12O40 (PW12) was firstly incorporated into the harmless porous metal organic framework MIL-101(Fe) resulting in POM@MOF composite material (denoted as PW12@MIL-101). The material was synthesized by a one-pot solvothermal reaction of H3PW12O40, FeCl3 center dot 6H(2)O and terephthalic acid (H(2)bdc). The composite was characterized by FTIR, XRD, thermogravimetric analysis (TGA), inductively coupled plasma (ICP) spectrometry, SEM, EDS, P-31 NMR and nitrogen adsorption-desorption isotherms. These results demonstrated the successful insertion of H3PW12O40 within the cavities of MIL-101(Fe). The adsorption rate of the isolated MIL-101 was up to 30.7% and 28.3% for cationic dyes methylene blue (MB) and rhodamine B (RhB), and 82% for anionic dye methyl orange (MO) within 30 min. However, the dye adsorption capacity of MIL-101 has greatly changed by introducing highly electronegative polyoxoanions into the cages of MIL-101. The adsorption rate of PW12@MIL-101 composite was able to reach 99% and 96% for cationic dyes MB and RhB, and 16% for anionic dye MO in the initial 5 min. Surprisingly, the composite not only exhibited a large-scale adsorption capacity of 473.7 mg g(-1) for MB, but also could quickly remove 97.3% MB from the dye solution with 1 ppm (1 mg L-1). Furthermore, this material could be easily desorbed for reuse, and the structure of the composite was intact during the adsorption experiment. Thus, it is a promising and environmentally friendly adsorbent for removing cationic organic pollutants in dye-wastewater.
机译：首先将Keggin型多氧化合物H3PW12O40（PW12）掺入无害的多孔金属有机框架MIL-101（Fe）中，得到POM @ MOF复合材料（表示为PW12 @ MIL-101）。通过H3PW12O40，FECL3中心点6H（2）O和对苯二甲酸（H（2）BDC）的单罐溶剂热反应合成该材料。复合材料的特征在于FTIR，XRD，热重分析（TGA），电感耦合等离子体（ICP）光谱，SEM，EDS，P-31 NMR和氮吸附 - 解吸等温线。这些结果表明，在MIL-101（Fe）的空腔内成功插入H3PW12O40。孤立MIL-101的吸附速率高达30.7％，阳离子染料亚甲基蓝（MB）和罗丹明B（RHB）的28.3％，以及82％的阴离子染料甲基橙（Mo）在30分钟内。然而，通过将高电负剂的多氧化到MIL-101的笼子将高电负剂的多氧体引入，MIL-101的染料吸附容量大大改变。 PW12 @ MIL-101复合材料的吸附速率能够达到99％和96％，阳离子染料Mb和RHB，初始5分钟内的阴离子染料Mo为16％。令人惊讶的是，综合不仅表现出MB的473.7mg G（-1）的大规模吸附容量，而且可以用1ppm（1mg L-1）从染料溶液中迅速去除97.3％MB。此外，这种材料可以很容易地解吸以进行再利用，并且在吸附实验期间复合材料的结构完好无损。因此，对于去除染料废水中的阳离子有机污染物是一种有前途和环保的吸附剂。

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  • 来源
    《RSC Advances》 |2016年第85期|共9页
  • 作者

    Zhu Ting-Ting; Zhang Zhi-Ming; Chen Wei-Lin; Liu Zhu-Jun; Wang En-Bo;

  • 作者单位

    Northeast Normal Univ Dept Chem Key Lab Polyoxometalate Sci Minist Educ Changchun 130024 Peoples R China;

    Northeast Normal Univ Dept Chem Key Lab Polyoxometalate Sci Minist Educ Changchun 130024 Peoples R China;

    Northeast Normal Univ Dept Chem Key Lab Polyoxometalate Sci Minist Educ Changchun 130024 Peoples R China;

    Northeast Normal Univ Dept Chem Key Lab Polyoxometalate Sci Minist Educ Changchun 130024 Peoples R China;

    Northeast Normal Univ Dept Chem Key Lab Polyoxometalate Sci Minist Educ Changchun 130024 Peoples R China;

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