文献详情
Synthesis of microporous Ni/NiO nanoparticles with enhanced microwave absorption properties
文献类型期刊
作者Liu, Tong[1];Pang, Yu[2];Xie, Xiubo[3];Qi, Wen[4];Wu, Ying[5];Kobayashi, Satoru[6];Zheng, Jie[7];Li, Xingguo[8]
机构
通讯作者Liu, T (reprint author), Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, 37 Xueyuan Rd, Beijing 100191, Peoples R China.
2016
期刊名称JOURNAL OF ALLOYS AND COMPOUNDS影响因子和分区
来源信息年:2016  卷:667  页码范围:287-296  
667
期刊信息JOURNAL OF ALLOYS AND COMPOUNDS影响因子和分区  ISSN:0925-8388
关键词Nickel; Microporous nanoparticles; Core/shell structure; Microwave absorption
页码范围287-296
增刊正刊
摘要The fabrication of microporous metal materials with many potential applications is challenging due to their high chemical activities and the difficulty in controlling the pore size. By adjusting the reaction condition and the composition of the Ni-Al nanoparticle precursor, we have successfully produced the microporous Ni nanoparticles (NPs) of 22 nm by chemical dealloying method. During the passivation process, the microporous Ni NPs covered with NiO shell are generated as the result of surface oxidation. The micropores range from 0.6 to 1.2 nm in diameter with a large surface area of 68.9 m(2)/g. Due to the elimination of Al atoms during dealloying process, the crystalline size of the microporous Ni NPs is sharply decreased to 2-5 nm. The specific architecture offers the microporous Ni/NiO NPs a small microwave reflection coefficient (RC) and a wide absorption bandwidth (RC <= -10 dB) of -49.1 dB and 5.8 GHz, much better than the nonporous counterpart of -24.1 dB and 3.7 GHz. The enhanced microwave absorption performance has been interpreted in terms of the micropore structure, core/shell structure and nanostructure effects. (C) 2016 Elsevier B.V. All rights reserved.
收录情况SCIE(WOS:000371556400044)  EI(20160701915031)  
所属部门材料科学与工程学院
DOI10.1016/j.jallcom.2016.01.175
百度学术Synthesis of microporous Ni/NiO nanoparticles with enhanced microwave absorption properties
语言外文
ISSN0925-8388
被引频次2121
人气指数31
浏览次数31
基金National Natural Science Foundation of China [U1560106]; Aeronautical Science Foundation of China [2014ZF51069]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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