Microstructure optimization of core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)flower-like multicomponent nanocomposites towards high-efficiency microwave absorption  

作　　者：Jingjing Zhang Xiaosi Qi Xiu Gong Qiong Peng Yanli Chen Ren Xie Wei Zhong 

机构地区：[1]College of Physics,Guizhou Province Key Laboratory for Photoelectrics Technology and Application,Guizhou University,Guiyang 550025,China [2]National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology,Nanjing University,Nanjing 210093,China

出　　处：《Journal of Materials Science & Technology》2022年第33期59-70,共12页材料科学技术（英文版）

基　　金：financially supported by the Fund of Fok Ying Tung Education Foundation;the Major Research Project of innovative Group of Guizhou province(2018–013);the Open Fund from Henan University of Science and Technology;the National Science Foundation of China(Nos.11964006 and 11774156);the Foundation of the National Key Project for Basic Research(No.2012CB932304)。

摘　　要：In this work,we put forward a scheme to exquisitely design and selectively synthesize the core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)flower-like multicomponent nanocomposites(MCNCs)through a simple two-step hydrothermal reaction on the surfaces of MFe_(2)O_4 nanospheres with the certain amounts of Mo and Se sources.With increasing the amounts of Mo and Se sources,the obtained core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)MCNCs with the enhanced content of MoSe_(2)and improved flower-like geometry morphology could be produced on a large scale.The obtained results revealed that the as-prepared samples displayed improved comprehensive microwave absorption properties(CMAPs)with the increased amounts of Mo and Se sources.The as-prepared CoSe_(2)/FeSe_(2)@MoSe_(2)and NiSe_(2)/FeSe_(2)@MoSe_(2)MCNCs with the well-defined flower-like morphology could simultaneously present the outstanding CMAPs in terms of strong absorption capability,wide absorption bandwidth,and thin matching thicknesses,which mainly originated from the conduction loss and flower-like geometry morphology.Therefore,the findings not only develop the very desirable candidates for high-performance microwave absorption materials but also pave a new way for optimizing the CMAPs through tailoring morphology engineering.

关 键 词：Core@shell structure MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co.Ni) multicomponent nanocomposites Flower-like geometry morphology Broad frequency bandwidth Microwave absorption 

分 类 号：TB332[一般工业技术—材料科学与工程]