| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation of Size-controllable Magnetic Mesoporous Carbons and Their Relaxation Properties |
| CAI Guang1,2, LI Lin1, WANG Rong1, CHEN Yanqiu1, CHEN Maolong1, CHENG Yunhui1, DING Li1, XU Zhou1
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1 School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
2 Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract 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.
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Published: 02 December 2020
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| Fund:This work was financially supported by the National Key Research and Development Program (2016YFF0103701,2016YFF0203800), National Natural Science Foundation of China (31401566), Hunan Innovation Platform and Talent Plan (2017RS3055), Grain Deep Processing and Quality Control Hunan Provincial Collaborative Innovation Project 2011 (2013448), Changshu Science and Technology Development Plan (Social Development) Project(CS201605) and Suzhou Science and Technology Plan Project(SNG201617). |
| About author:: Guang Caireceived his bachelor's degree in food science and engineering from the Changsha University of Science and Technology from September 2015 to July 2019. He is now studying for his master's degree in Beijing Advanced Innovation Center for Soft Matter Science and Engineering of Beijing university of Chemical Technology. During his undergraduate study, he won the third prize of university-level science and technology project, the second prize of university-level English competition, the second prize of Lee Kum Kee cup, the first prize of Master Kong cup campus creative competition, the school merit student, the school outstanding student second prize scholarship and many other awards. During this period, he has been assisting Associate Professor Zhou Xu in research on food safety testing, metal organic framework materials and their derivatives.Zhou Xu, born in 1983, is an associate professor at Changsha University of Science and Technology, a graduate tutor, a “Huxiang Scholar” from Changsha University of Science and Technology, a visiting scholar at the University of California at Davis, and a reviewer of international journals such as RSC Advances. Mainly engaged in nano-biosensing technology, food safety and rapid detection of key technologies and other research works. In recent years, he has hosted more than 10 projects such as the National Natural Science Foundation of China and the National Key Research and Development Program sub-projects, and published more than 20 papers in the first position (including more than 10 articles in SCI and 4 articles in IF ≥ 5.0). There are 16 patents, including 1 US patent. Leading the key technology for rapid detection of cereal food safety, and won the second prize of Hunan Science and Technology Progress Award. “Study on new principles and new methods of functional nano-materials and self-assembled food safety testing” won the first prize of Natural Science of Hunan Entry-Exit Inspection and Quarantine Bureau. prize. |
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2020, Vol. 34 
