摘要
本论文发展了一种简单、低成本的一步"同步还原-自组装(SRSA)"水热法并制备了自组装Fe_(3)O_(4)分级结构的微球(Fe_(3)O_(4)HMSs).在合成过程中,仅使用甘油、水和铁氰化钾作为反应物,而无需任何其他还原剂、表面活性剂或添加剂即可获得自组装Fe_(3)O_(4)HMSs.其中,K3[Fe(CN)6]和甘油是合成自组装Fe_(3)O_(4)HMSs的两个重要因素.自组装Fe_(3)O_(4)HMSs可以作为高性能的锂离子存储材料,在0.5Ag^(-1)的电流密度下,经过270次循环后比容量大于1000 mA hg^(-1).进一步充电和放电结果表明自组装Fe_(3)O_(4)HMSs表现出良好的可逆性能(放电比容量维持在1000mA h g^(-1)以上)和循环稳定性(700次循环).此外,作为多功能材料,自组装Fe_(3)O_(4)HMSs的饱和磁化强度达到99.5 emu g^(-1),其可以进一步作为高效、磁性可回收的催化剂用于高效的硝基化合物加氢反应.
Self-assembled Fe_(3)O_(4)hierarchical microspheres(HMSs) were prepared by a one-pot synchronous reduction–self-assembling (SRSA) hydrothermal method.In this simple and inexpensive synthetic process,only glycerol,water,and a single iron source (potassium ferricyanide (K3[Fe(CN)6]))were employed as reactants without additional reductants,surfactants,or additives.The iron source,K3[Fe(CN)6],and glycerol significantly affected the synthesis of Fe_(3)O_(4)HMSs.Fe_(3)O_(4)HMSs with a self-assembled spherical shape readily functioned as high-performance anode materials for lithiumion batteries with a specific capacity of>1000 mA h g^(-1)at0.5 A g^(-1)after 270 cycles.Further charging and discharging results revealed that Fe_(3)O_(4)HMSs displayed good reversible performance (>1000 mA h g^(-1)) and cycling stability (700 cycles) at 0.5 A g^(-1).Furthermore,as multifunctional materials,the as-obtained Fe_(3)O_(4)HMSs also exhibited high saturation magnetization (99.5 emu g^(-1)) at room temperature (25°C) and could be further employed as efficient and magnetically recyclable catalysts for the hydrogenation of nitro compounds.
作者
吴孔林
凌敏
曾培源
张亮
吴涛
关平丽
张永臻
陈郑
方臻
魏先文
Konglin Wu;Min Ling;Peiyuan Zeng;Liang Zhang;Tao Wu;Pingli Guan;Weng-Chon Cheong;Zheng Chen;Zhen Fang;Xianwen Wei(Institute of Clean Energy and Advanced Nanocatalysis(iClean),School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243002,China;College of Chemistry and Materials Science,Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes,the Key Laboratory of Functional Molecular Solids,Ministry of Education,Anhui Normal University,Wuhu 241002,China;Department of Physics and Chemistry,Faculty of Science and Technology,University of Macao,Macao,China)
基金
the financial support from the National Natural Science Foundation of China (21501004,21771003,21901007 and 21671005)
Anhui Provincial Natural Science Foundation for Distinguished Youth (1808085J27)。
