Recently,developing carbon-based hybrid materials loaded with magnetic components has been gener-ally regarded as a promising and practically feasible strategy when it comes to constructing lightweight electromagnetic wave absorbers.In the current work,reclaimed carbon black(CB)nanopowder was firstly produced by simple burning of wheat straw,which was then employed as sustainable carbon-based host materials(carrier)and successfully decorated Co@C nanoparticles via a simple thermal reduction process.Remarkably,both the as-fabricated nanocomposites and corresponding electromagnetic wave absorption performances could be effectively tuned by tailoring the dosage of the Co@C nanoparticles.The mini-mum reflection loss(RLmin)of-53.989 dB was achieved for CB/Co@C-2#at 2.28 mm thickness,mean-while,CB/Co@C-3#was featured by a wide effective absorption band(EAB)of 6 GHz(6.72-12.72 GHz)at a 2.73 mm matching thickness,which covered the entire X band,suggesting that the CB/Co@C nanocom-posites were an attractive candidate for electromagnetic wave absorber.According to the synergistic influ-ence of dielectric loss and magnetic loss from CB and Co@C,respectively,as well as the properly matched impedance,a reasonable electromagnetic wave attenuation mechanism was illustrated.It is noteworthy that the preparation process of CB is a facile,recycled,and low-cost strategy for achieving nanoscale carbon-based absorbing materials,moreover,the CB/Co@C nanocomposites provide a reference for con-structing lightweight dielectric-magnetic products with superb electromagnetic wave absorption perfor-mances.

Zhenjiang Li;Hui Lin;Yuxin Xie;Laibin Zhao;Yuying Guo;Tingting Cheng;Hailong Ling;Alan Meng;Shaoxiang Li;Meng Zhang

College of Materials Science and Engineering,College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China;State Key Laboratory Base of Eco-chemical Engineering,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection,Shandong Engineering Technology Research Center for Advanced Coating,College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

材料科学技术（英文版）

[1]Zhenjiang Li;Hui Lin;Yuxin Xie;Laibin Zhao;Yuying Guo;Tingting Cheng;Hailong Ling;Alan Meng;Shaoxiang Li;Meng Zhang-.Monodispersed Co@C nanoparticles anchored on reclaimed carbon black toward high-performance electromagnetic wave absorption)[J].材料科学技术（英文版）,2022(29):182-192

Monodispersed,nanopowder,2#at,3#was

Co,nanoparticles,anchored,reclaimed,carbon,black,toward,high,electromagnetic,wave,absorption,Recently,developing,hybrid,materials,loaded,components,has,been,gener,regarded,promising,practically,feasible,strategy,when,comes,constructing,lightweight,absorbers,In,current,work,CB,firstly,produced,by,simple,burning,wheat,straw,which,then,employed,sustainable,host,carrier,successfully,decorated,via,thermal,reduction,process,Remarkably,both,fabricated,nanocomposites,corresponding,performances,could,effectively,tuned,tailoring,dosage,mini,mum,reflection,loss,RLmin,dB,achieved,thickness,mean,while,featured,wide,band,EAB,GHz,matching,covered,entire,suggesting,that,were,attractive,candidate,According,synergistic,influ,dielectric,from,respectively,well,properly,matched,impedance,reasonable,attenuation,mechanism,illustrated,It,noteworthy,preparation,facile,recycled,low,cost,achieving,nanoscale,absorbing,moreover,provide,reference,products,superb

0.548932