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[1]关 月,陈尚良,汪苏平,等.磁性纳米粒子表面巯基测定及催化性能[J].武汉工程大学学报,2023,45(04):418-422.[doi:10.19843/j.cnki.CN42-1779/TQ.202012019]
 GUAN Yue,CHEN Shangliang,WANG Suping,et al.Determination of Surface Sulfhydryl Groups and CatalyticPerformance of Magnetic Nanoparticles[J].Journal of Wuhan Institute of Technology,2023,45(04):418-422.[doi:10.19843/j.cnki.CN42-1779/TQ.202012019]
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磁性纳米粒子表面巯基测定及催化性能(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
45
期数:
2023年04期
页码:
418-422
栏目:
材料科学与工程
出版日期:
2023-08-31

文章信息/Info

Title:
Determination of Surface Sulfhydryl Groups and Catalytic
Performance of Magnetic Nanoparticles
文章编号:
1674 - 2869(2023)04 - 0418 - 05
作者:
关 月陈尚良汪苏平吴江渝*
武汉工程大学材料科学与工程学院,湖北 武汉 430205
Author(s):
GUAN YueCHEN ShangliangWANG SupingWU Jiangyu*
School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
关键词:
表面修饰巯基磁性纳米粒子催化活性
Keywords:
surface modification sulfhydryl group magnetic nanoparticles catalytic activity
分类号:
TQ138
DOI:
10.19843/j.cnki.CN42-1779/TQ.202012019
文献标志码:
A
摘要:
利用带有巯基的硅烷偶联剂对Fe3O4@SiO2粒子进行表面巯基修饰。采用Frens法制备纳米金胶体,通过纳米金与巯基之间的配位作用,将纳米金附着在磁性纳米粒子的表面,制得磁性纳米催化剂。采用激光粒度仪检测Fe3O4粒子、Fe3O4@SiO2粒子及磁性纳米催化剂的粒径。用5,5′-二硫基-双(二硝基苯甲酸)试剂检测纳米粒子表面的巯基密度,并研究了温度对磁性纳米催化剂的催化活性的影响。结果表明:Fe3O4粒子的粒径约为251 nm,被SiO2包覆的Fe3O4粒子粒径约为300 nm,而磁性纳米催化剂的粒径约为336 nm。巯基化磁性纳米粒子的表面巯基密度为3.54×10-6 mol/m2。升高温度对催化反应有促进作用,室温下对硝基苯酚的催化还原反应在35 min内完成,而70 ℃下5 min内即可完成。

Abstract:
The surface of Fe3O4@SiO2 nanoparticles was modified using a silane coupling agent with sulfhydryl groups. Gold nanoparticles were prepared by the Frens method,and were adhered onto the surface of the magnetic nanoparticles through the coordination between gold and the sulfhydryl groups to prepare the magnetic nanocatalyst. The particle size of Fe3O4 particles,Fe3O4@SiO2 particles and the magnetic nanocatalysts were determined using a laser particle size analyzer. The density of sulfhydryl groups on the surface of magnetic nanoparticles was determined using 5,5’-dithiobis-(2-nitrobenzoic acid) reagent,and the effect of temperature on the catalytic activity of the magnetic nanoparticles was investigated. The results show that the particle sizes of Fe3O4,Fe3O4@SiO2 nanoparticles and magnetic nanocatalyst are about 251 nm,300 nm,and 336 nm,respectively. The density of sulfhydryl groups on the surface of magnetic nanoparticles is 3.54×10-6 mol/m2. The catalytic activity of the prepared magnetic nanocatalyst can be promoted by increasing the reaction temperature. The catalytic reduction of p-nitrophenol needs 35 min at a room temperature,while the reaction can be completed in 5 min at 70 ℃ .

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备注/Memo

备注/Memo:
收稿日期:2020-12-17
基金项目:青海省科技厅重点研发与成果转化类(2020-GX-103)
作者简介:关 月,硕士研究生。E-mail:[email protected]
*通讯作者:吴江渝,博士,教授。E-mail:[email protected]
引文格式:关月,陈尚良,汪苏平,等. 磁性纳米粒子表面巯基测定及催化性能[J]. 武汉工程大学学报,2023,45(4):418-422.
更新日期/Last Update: 2023-08-31