Tunable and improved microwave absorption of flower-like core@shell MFe_(2)O_(4)@MoS_(2)(M=Mn,Ni and Zn)nanocomposites by defect and interface engineering  

作　　者：Junxiong Xiao 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》2023年第8期137-146,共10页材料科学技术（英文版）

基　　金：This work was supported by the Fund of Fok Ying Tung Edu-cation Foundation,the Major Research Project of Innovative Group of Guizhou province(No.2018-013);Open Fund from Henan Uni-versity 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)for fi-nancial support。

摘　　要：Previous results revealed that the defect and/or interface had a great impact on the electromagnetic pa-rameters of materials.In order to understand the main physical mechanisms and effectively utilize these strategies,in this study,M Fe_(2)O_(4)and flower-like core@shell M Fe_(2)O_(4)@MoS_(2)(M=Mn,Ni,and Zn)sam-ples with different categories were elaborately designed and selectively produced in large scale through a simple two-step hydrothermal reaction.We conducted the systematical investigation on their microstruc-tures,electromagnetic parameters and microwave absorption performances(MAPs).The obtained results revealed that the large radius of M^(2+)cation could effectively boost the concentration of oxygen vacancy in the M Fe_(2)O_(4)and M Fe_(2)O_(4)@MoS_(2)samples,which resulted in the improvement of dielectric loss capabil-ities and MAPs.Furthermore,the introduction of MoS_(2)nanosheets greatly improved the interfacial effect and enhanced the polarization loss capabilities,which also boosted the MAPs.By taking full advantage of the defect and interface,the designed M Fe_(2)O_(4)@MoS_(2)samples displayed tunable and excellent com-prehensive MAPs including strong absorption capability,wide absorption bandwidth and thin matching thicknesses.Therefore,the clear understanding of defect and interface engineering made these strategies well elaborately designed and applicable to improving MAPs.

关 键 词：Core@shell structure M Fe_(2)O_(4)@MoS_(2)(M=Mn Ni and Zn) Defect and interface engineering Improved microwave absorption properties 

分 类 号：TB332[一般工业技术—材料科学与工程]