Preparation of Size-controllable Magnetic Mesoporous Carbons and Their Relaxation Properties

被引：0

作者：

Cai G. ^{[1
,2
]}

Li L. ^{[1
]}

Wang R. ^{[1
]}

Chen Y. ^{[1
]}

Chen M. ^{[1
]}

Cheng Y. ^{[1
]}

Ding L. ^{[1
]}

Xu Z. ^{[1
]}

机构：

[1] School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha

[2] Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing

来源：

Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 22期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Magnetic mesoporous carbons; Metal-organic frameworks; Relaxation rates; Size-controllable;

D O I：

10.11896/cldb.19090023

中图分类号：

学科分类号：

摘要：

In recent years, magnetic mesoporous carbons (MMCs) have shown great application prospects in the fields of medical imaging, drug transportation and biosensing. Firstly, metal-organic frameworks (MOFs) with controllable particle sizes in the range of 60~330 nm were prepared via controlled crystal growth method by controlling the number of growths, Then,they were calcined at a specific temperature in N2 atmosphere to prepare the MMCs with controllable particle sizes in the range of 220-310 nm successfully. The changes of microstructure, dispersion, chemical structure and functional group as well as relaxation property were studied by TEM, DLS, FTIR and proton transverse relaxation rate. The results show that the proton transverse relaxation rate of MMCs after calcination is nearly 12-48 times higher than that of the MOFs precursor, and the proton transverse relaxation rate of MMCs with different particle sizes increases with the increase of particle sizes. The MMCs with an average size of 310 nm have the largest transverse relaxation rate of 34.205 mM-1•s-1. © 2020, Materials Review Magazine. All right reserved.

引用

页码：22020 / 22023

页数：3

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