催化作用
对苯二甲酸
热解
三聚氰胺
纳米颗粒
弗里德尔-克拉夫茨反应
石墨氮化碳
化学
碳纤维
酰化
金属有机骨架
材料科学
无机化学
有机化学
纳米技术
吸附
光催化
复合材料
聚酯纤维
复合数
作者
Chen Zhao,Hao Zhang,Zhenyu Lei,Songsong Miao,Hui Sun,Yuting Sun,Wenxiang Zhang,Mingjun Jia
标识
DOI:10.1016/j.cattod.2022.04.003
摘要
Developing efficient heterogeneous catalysts for Friedel-Crafts acylation (FCA) reactions is highly attractive for its wide application in green synthesis and biomass conversion. Herein, a series of graphitic carbon-wrapped iron nanoparticles (Fe/C-x, x refers to the heat temperature ranged from 500 to 800 °C) were prepared through pyrolysis of a metal-organic framework (MOF) precursor of Fe-TPA-Mel, synthesized from iron salt, terephthalic acid (TPA) and melamine (Mel). The resultant Fe/C-600 catalyst exhibited excellent catalytic activity for the acylation of aromatic compounds with acyl chlorides, and better recyclability than the reference catalyst of Fe/C-600-ref derived from the Fe-TPA precursor. Various characterization results demonstrated that introducing melamine in the MOF precursor is beneficial for the formation of graphitic carbon-wrapped Fe nanoparticles at relatively low pyrolysis temperature, although the N species existed in the precursor of Fe-TPA-Mel could be nearly completed removed during the pyrolysis process. The relatively uniform graphitic carbon shell could provide an effective protection for the inside active iron species, finally resulting in the generation of stable and easily recycled heterogeneous FCA catalysts.
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