Facile construction of core-shell Carbon@CoNiO2 derived from yeast for broadband and high-efficiency microwave absorption

Zhenxia Lu; Fang Ren; Zhengzheng Guo; Zhong Dai; Baiqiao Fu; Ze Zong; Fudong Zhang; Yanling Jin; Zhengyan Chen; Penggang Ren

doi:10.1016/j.jcis.2022.06.012

Facile construction of core-shell Carbon@CoNiO₂ derived from yeast for broadband and high-efficiency microwave absorption

J Colloid Interface Sci. 2022 Nov:625:415-424. doi: 10.1016/j.jcis.2022.06.012. Epub 2022 Jun 14.

Authors

Zhenxia Lu¹, Fang Ren², Zhengzheng Guo³, Zhong Dai³, Baiqiao Fu¹, Ze Zong¹, Fudong Zhang¹, Yanling Jin¹, Zhengyan Chen¹, Penggang Ren⁴

Affiliations

¹ The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an Shaanxi 710048, PR China.
² The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an Shaanxi 710048, PR China; College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu Sichuan 610065, PR China. Electronic address: renfang0824@163.com.
³ School of Materials Science and Engineering, Xi'an University of Technology, Xi'an Shaanxi 710048, PR China.
⁴ The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an Shaanxi 710048, PR China; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an Shaanxi 710048, PR China. Electronic address: rengpg@126.com.

PMID: 35724464
DOI: 10.1016/j.jcis.2022.06.012

Abstract

Manufacturing dielectric/magnetic composites with hierarchical structure is regard as a promising strategy for the progress of high-performance microwave absorption (MA) materials. In this paper, the nano-grass structured CoNiO₂ magnetic shell was uniformly anchored on the yeast-derived carbon microspheres by in-situ one-pot synthesis method. Profiting from the unique nano-grass and core-shell structure, capable dielectric/magnetic loss, along with improved impedance matching, the prepared absorber realizes desirable MA performance. The minimum reflection loss (RL_min) reaches up to -44.06 dB at 6.56 GHz. Moreover, the effective absorption bandwidth (EAB, reflection loss (RL) < -10 dB) accomplishes 7.04 GHz under a low filler loading of 20 wt%. This work endeavors a valuable insight for designing innovative core-shell structured materials with high-efficiency MA and broad bandwidth.

Keywords: Core-shell structure; Interface polarization; Microwave absorption; Nano-grass structured CoNiO(2).

MeSH terms

Carbon* / chemistry
Electric Impedance
Excipients
Microwaves*
Saccharomyces cerevisiae

Substances

Excipients
Carbon