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首页> 外文期刊>Journal of Polymers and the Environment >Improved Catalytic Activity of Composite Beads Calcium Alginate@MIL-101 @Fe_3O_4 Towards Reduction Toxic Organic Dyes
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Improved Catalytic Activity of Composite Beads Calcium Alginate@MIL-101 @Fe_3O_4 Towards Reduction Toxic Organic Dyes

机译：改进复合珠粒钙藻酸钙的催化活性@ MIL-101 @ Fe_3O_4对减少有毒有机染料

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摘要

The defiance of this study was to explore the potential of alginate/MIL-101 beads containing Fe3O4 nanoparticles as a catalyst for the reduction of dyes. The Fe3O4@MIL-101 magnetic composite was obtained by the mechanical method and then encapsulated using calcium alginate (CA) as a crosslinked matrix. The Fe3O4(X)@MIL-101/CA composites beads at different content (X) of Fe3O4 nanoparticles were evaluated for the catalytic reduction of methylene blue (MB) and orange G (OG). The aerogel beads have completed the MB dye reduction after 7 min with a rate constant of 0.962 min(-1). This strong activity is assigned to the synergistic effect between Cr containing MIL-101 the Fe3O4 particles and the hydrides formed on the catalyst surface. The obtained optimal conditions of MB dye reduction were used for the reduction of OG dye in simple and binary system.The best catalyst M(1)@MIL-101/CA showed a high affinity via MB dye in a binary system. Then was easily recovered by an external magnetic field and reused for 4 cycles. On the other hand, the time of the catalytic activity clearly increased in its 4th reuse in the reduction of MB dye but did not affect the efficiency of catalytic reduction.
机译：本研究的蔑视是探讨含有Fe3O4纳米颗粒作为催化剂的藻酸盐/密耳-101珠粒的潜力，用于还原染料。通过机械方法获得Fe3O4 @ MIL-101磁性复合物，然后使用藻酸钙（CA）作为交联基质包封。评价Fe3O4纳米颗粒的不同含量（X）的Fe3O4（X）@ MIL-101 / Ca复合材料，用于催化还原亚甲基蓝（MB）和橙G（OG）。在7分钟后，气凝胶珠在7分钟后完成了Mb染料，速率常数为0.962min（-1）。该强活动被分配给含有MIL-101的Cr与催化剂表面上形成的氢化物之间的Cr之间的协同效应。获得的MB染料还原的最佳条件用于简单和二元体系中的OG染料。最佳催化剂M（1）@ MIL-101 / Ca通过MB染料在二元体系中显示出高亲和力。然后通过外部磁场容易地恢复并重新利用4个循环。另一方面，催化活性的时间在其第4次重复中明显增加，减少了MB染料，但不影响催化还原的效率。

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