催化作用
纳米复合材料
纳米颗粒
碳纤维
碳化
材料科学
铜
介孔材料
无机化学
化学工程
水溶液
磁性纳米粒子
浸出(土壤学)
纳米技术
化学
复合材料
复合数
物理化学
有机化学
冶金
扫描电子显微镜
工程类
土壤水分
土壤科学
环境科学
作者
Xin Ge,Hui Zhang,Ge Meng,Xuemin Liu,Shuang Yuan
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2021-10-29
卷期号:4 (11): 11681-11692
被引量:5
标识
DOI:10.1021/acsanm.1c02248
摘要
Heterogenous copper nanoparticle (Cu NP) catalysts supported on magnetic nitrogen (N)-doped carbon–silica materials with a core–shell structure were fabricated by a facile one-pot hydrothermal carbonization reaction. The Cu NPs with a diameter of 10 nm were generated by an in situ process in which the Cu2+ was reduced by glucosamine. The N atoms doped into the magnetic nanocomposites were derived from glucosamine and anchored to the Cu NPs. The hydrophilicity of the carbon-based shell promoted uniform dispersion of the resulting core–shell nanoparticles in water. Moreover, the mesoporous carbon not only improved the mass transfer efficiency of the organic substrates to and from the catalysts but also prevented the Cu NPs from aggregating and leaching. Owing to these merits, the resultant magnetic nanocomposite particles Fe3O4@SiO2@GA/Cu exhibited excellent catalytic activity for aqueous C–N coupling reactions without any additives, as well as showed good universality toward different aryl halides and various nitrogen nucleophiles with moderate to excellent yields. More importantly, the Fe3O4@SiO2@GA/Cu catalysts were easily recovered using an external magnet and showed stable performance over five reaction cycles.
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