[1]徐伟刚,张 青,雷 冲,等.疏水磁多孔Fe3O4@碳质纳米微球用作酸碱协同催化的性能[J].常州大学学报(自然科学版),2023,35(04):27-36.[doi:10.3969/j.issn.2095-0411.2023.04.005]
　XU Weigang,ZHANG Qing,LEI Chong,et al.Surface hydrophobic magnetic porous Fe3O4@carbonaceous microspheres applicated as heterogeneous acid-base cooperative catalysis[J].Journal of Changzhou University(Natural Science Edition),2023,35(04):27-36.[doi:10.3969/j.issn.2095-0411.2023.04.005]
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疏水磁多孔Fe3O4@碳质纳米微球用作酸碱协同催化的性能()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第35卷
期数:
2023年04期
页码:
27-36
栏目:
化学化工
出版日期:
2023-07-28

文章信息/Info

Title:
Surface hydrophobic magnetic porous Fe3O4@carbonaceous microspheres applicated as heterogeneous acid-base cooperative catalysis
文章编号:
2095-0411(2023)04-0027-10
作者:
徐伟刚1; 2;  张 青2;  雷 冲2;  桂豪冠2
(1.常州卫生高等职业技术学校 医药技术管理系, 江苏 常州 213003; 2.常州大学 石油化工学院, 江苏 常州 213164)
Author(s):
XU Weigang1; 2;  ZHANG Qing2;  LEI Chong2;  GUI Haoguan2
(1.Department of Medical Technology Management, Changzhou Hygiene Vocational Technology College, Changzhou 213003, China; 2.School of Petrochemical Engineering,Changzhou University,Changzhou 213164, China)
关键词:
Fe3O4@碳质;  多孔;  磁性;  酸碱催化剂;  酯化;  酯交换
Keywords:
Fe3O4@carbonaceous;  porous;  magnetic;  acid-based catalysis;  esterification;  transesterification
分类号:
TQ 645.6
DOI:
10.3969/j.issn.2095-0411.2023.04.005
文献标志码:
A
摘要:
采用水热自组装和表面接枝法制备了具有核-壳式结构的Fe3O4@P-C-SO3H-N纳米材料。其内核由纳米Fe3O4构成,外壳由多孔磺酸基功能化的碳质结构组成,氨基硅烷与碳质表面的有机基团通过表面接枝连接,使材料获得以磺酸基为酸中心,以胺基为碱中心的酸碱协同催化活性,同时具备磁性、多孔性和疏水性等多种性能。Fe3O4@P-C-SO3H-N的各项物理化学性质采用BET,XRD,FT-IR,XPS,Raman,SEM和TEM等技术表征。催化活性实验表明 Fe3O4@P-C-SO3H-N在三羟基丙烷与正戊酸的酯化反应和三羟基丙烷三戊酸酯与甲醇的液相酯交换反应中具有良好的催化活性,这归因于介孔结构、碳质壳内的磺酸基、表面胺基和疏水性的协同作用,多孔结构促成致密但均匀的表面活性位点的分布,疏水性表面让油性的反应物更容易和活性位点接触。此外,磁性内核提供了超顺磁性能,能够方便纳米催化剂与反应体系的高效分离。
Abstract:
Fe3O4@P-C-SO3H-N was synthesized by hydrothermal self-assembly and surface grafting, which has a typical core-shell structure. The core was nano-sized Fe3O4, and the shell was composed of porous sulfonic acid functionalized carbonaceous group. Aminosilane and carbonaceous surface organic group were connected by surface grafting. The Fe3O4@P-C-SO3H-N material has sulfo group acid center with magnetic, porous and hydrophobic properties. The physico-chemical properties of the Fe3O4@ P-C-SO3H-N were characterized by BET, XRD, FT-IR, XPS, Raman, SEM and TEM. As a carbonaceous-based materials, Fe3O4@ P-C-SO3H-N has excellent catalytic activities in the esterification reaction of trihydroxypropane with valentic acid and the liquid phase transesterification reaction of trihydroxypropane trivalentate with methanol. This results were attributed to the combination of mesporous structure, the sulfonate group within the carbonaceous shell, surface amine group and hydrophobicity, resulting in a dense but uniform distribution of surface active sites that make oleatic reactants more easily in contact with the active sites. In addition, the magnetic core provides super paramagnetic property and facilitates the efficient separation of the nano-catalyst from the reaction system.

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(责任编辑:谭晓荷)

备注/Memo

备注/Memo:
收稿日期: 2023-02-25。
作者简介: 徐伟刚(1968—), 女, 江苏常州人, 副教授。 E-mail: xuweigang19680723@163.com
更新日期/Last Update: 1900-01-01