A solvent-free process enabling ZnO/porous carbon with enhanced microwave absorption  

作　　者：Qi Chen Xing Liu Tingting Wang Xiaogang Su Meng Liu Somboon Chaemchuen Francis Verpoort 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [3]School of Mathematical&Physical Sciences,Wuhan Textile University,Wuhan 430200,China [4]National Research Tomsk Polytechnic University,Lenin Avenue 30,634050 Tomsk,Russian Federation [5]School of Materials Science and Engineering,North University of China,Taiyuan 030051,China

出　　处：《Journal of Materials Science & Technology》2023年第18期255-264,共10页材料科学技术（英文版）

基　　金：the State Key Lab of Advanced Technology for Materials Synthesis and Processing(Wuhan Univer-sity of Technology)for financial support.

摘　　要：Exploring a simple,rapid,solvent-free synthetic method for mass production of cheap,broadband mi-crowave absorbers remains the main challenge.Here,a mild solvent-free procedure is reported to syn-thesize zinc oxide nanoparticles(ZnO NPs)embedded in porous carbon derived from mixing sucrose and zinc nitrate hexahydrate.The characteristic morphology and the ZnO NPs distribution in these compos-ites were tuned using the different raw materials proportions.The mesoporous structure of porous car-bon benefits the compositional advantages between carbon foam and ZnO NPs.The optimal synthesized ZnO/C-2 carbon material demonstrates the strongest absorption of-41.7 dB with a frequency of 14.5 GHz at a thin thickness of 2 mm,and its widest effective absorption is close to 6 GHz(12.2-17.8 GHz).This work produces a feasible route for the sensible design of other effective microwave absorbers for large-scale production.

关 键 词：Solvent-free method Porous carbon Dielectric materials Interfacial polarization Microwave broadband absorption 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]