Enhancing electromagnetic absorption performance of Molybdate@Carbon by metal ion substitution  

作　　者：Aming Xie Daohu Sheng Wenli Liu Youjian Chen Siyao Cheng 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing

出　　处：《Journal of Materials Science & Technology》2023年第32期92-100,共9页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(No.52273267);the Fundamental Research Funds for the Central Universities(No.30920041102)。

摘　　要：Transition metal molybdate(RMoO4)has been extensively studied in optics,electricity and catalysis due to its low cost and multivalent Mo atoms,while its poor electrical conductivity limits its application in electromagnetic wave absorption(EMA).Compounding molybdate with conductive materials is an effective way to improve its electrical conductivity.In this work,a homogeneous coating on the molybdate surface was achieved by utilizing a pyrrole oxidation polymerization mechanism,and then stabilized composites of Molybdate@Carbon(RMoO4@C)were obtained by high-temperature pyrolysis.The EMA properties of the nanocomposites were tuned by substituting the species of transition metal elements(RMoO_(4)@C,R=Fe,Co,Cu).Among them,Fe_(2)(MoO_(4))_(3)@C has a minimum reflection loss of−60.62 dB at an ultra-low thickness of 1.7 mm,and the effective absorption bandwidth(EAB)can reach 4.75 GHz at 3.00 mm.This work expands the range of applications for molybdate and provides a new material basis for building high-performance EMA materials.

关 键 词：Transition metal molybdate Electrical conductivity Molybdate@Carbon Electromagnetic wave absorption 

分 类 号：TQ134.11[化学工程—无机化工]