编号：CDUT-2022-04

标题：Tunable defects and interfaces of hierarchical dandelion-like NiCo2O4 via Ostwald ripening process for high-efficiency electromagnetic wave absorption

入藏号：WOS:000729953800003

中国科学院文献情报中心期刊分区（升级版）：工程技术1区/TOP

本校作者：柴梁；王益群*；Liu, Zhixin；周世一；何秦川；杜海英

来源出版物：CHEMICAL ENGINEERING JOURNAL卷429文献号132547

出版年：2022年

第一单位：成都理工大学

关键词： Hierarchical structure；Dandelion shape；Self-assembly technique；Nickel cobaltate；Ostwald ripening；Microwave absorption

代表图：

摘要：Micromorphology of absorbent materials has always been one of the important parameters of microwave ab-sorption performance. The adjustment of morphologic and structure can effectively enhance absorbing perfor-mance. In this work, hierarchical dandelion-like NiCo2O4(HDNCO) is prepared by solvothermal method and calcination. The effects of Ostwald ripening process on structure, morphology and absorbing performance are studied. The results indicate that structure and morphology of HDNCO have a significant effect on the absorption performance. Due to the special morphology and structure of HDNCO, the impedance matching can be improved. When Ostwald ripening process is 2 h, the reflection loss (RL) value reaches 45.08 dB at 2.1 mm, and the effective absorption bandwidth (EAB) is 3.06 GHz. Moreover, the EAB of HDNCO with Ostwald ripening time of 6 h reaches 3.68 GHz at only 1.0 mm and the EAB of HDNCO with Ostwald ripening time of 9 h is 5.78 GHz at 2.2 mm. The Ostwald ripening process changes the structure and morphology of HDNCO, which leads to improve the absorbing properties. Thus, this work has important guiding significance for the structural design of high- performance microwave absorber.

文章链接地址： https://www.sciencedirect.com/science/article/pii/S1385894721041255?via%3Dihub