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Hypercrosslinked mesoporous polymers: Synthesis, characterization and its application for catalytic reduction of 4-nitrophenol
Colloid and Interface Science Communications ( IF 4.5 ) Pub Date : 2020-06-10 , DOI: 10.1016/j.colcom.2020.100285
Huimin Zhou , Qibin Chen , Xuefeng Tong , Honglai Liu

A mesoporous hypercrosslinked polymer (HCP), derived from a Friedel-Crafts alkylation reaction of 1,4-bis(chloromethyl)benzene and a precursor contained heterocyclic ionic liquids, was synthesized, having a high specific surface area with abundant mesopore and specific porosity. In order to reduce 4-nitrophenol (4-NP) to 4-aminophenol (4-AP), a new bismuth nanoparticle/HCP composite (Bi/HCP) as a catalyst was prepared, where the HCP was used as a catalyst carrier. Herein, the HCP was firstly impregnated into a BiCl3 solution to adsorb the Bi3+ ions. After that, these Bi3+ ions adsorbed were then reduced in situ using KBH4, affording the ultimate Bi/HCP composite. In such Bi/HCPs, Bi nanoparticles with a small diameter of 1–3 nm were evenly dispersed. In this work, the Bi/HCPs exhibit an excellent catalytic performance toward the reduction of 4-NP with a low loading, the reaction rate constant k is calculated to be 2.2 min−1, and the catalytic activity did not decrease even after 8 reaction cycles.



中文翻译:

超交联介孔聚合物的合成,表征及其在催化还原4-硝基苯酚中的应用

合成了具有1,4-双(氯甲基)苯与含有杂环离子液体的前体的弗瑞德-克来福特(Friedel-Crafts)烷基化反应的介孔超交联聚合物(HCP),它具有高的比表面积,丰富的介孔和比孔率。为了将4-硝基苯酚(4-NP)还原为4-氨基苯酚(4-AP),制备了新型的铋纳米粒子/ HCP复合材料(Bi / HCP)作为催化剂,其中HCP用作催化剂载体。在此,首先将HCP浸渍在BiCl 3溶液中以吸收Bi 3+离子。之后,然后使用KBH 4原位还原这些吸附的Bi 3+离子,提供了最终的Bi / HCP复合材料。在此类Bi / HCP中,直径为1-3 nm的Bi纳米颗粒均匀分散。在这项工作中,Bi / HCP在低负荷下表现出优异的催化还原4-NP的性能,反应速率常数k计算为2.2 min -1,即使经过8次反应,催化活性也没有降低周期。

更新日期:2020-06-10
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