Nickel/porous carbon derived from rice husk with high microwave absorption performance

• Published in: Journal of alloys and compounds Vol. 925; p. 166732
• Main Authors: Wu, Zhihong, Guo, Xinyu, Meng, Zhenzhen, Yao, Cheng, Deng, Yue, Zhou, Huafeng, Wang, Yubin
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.12.2022; Elsevier BV
• Subjects: Biomass; Biomass hierarchical porous carbon; Carbon; Composite materials; Dielectric loss; Electroless plating; Electromagnetic properties; Environmental impact; Frequency ranges; Microwave absorption; Microwave absorption performance; Porous materials; Rice husk; Thickness; Rice husk; Biomass hierarchical porous carbon; Microwave absorption performance
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2022.166732

BHPC (biomass hierarchical porous carbon) is a new microwave absorption material with extraordinarily low density, excellent dielectric loss, and a low environmental impact. In this paper, a Ni/BHPC composite is introduced, which were fabricated using a simple electroless plating method. When the NiSO4 concentration is changed, the electromagnetic characteristics and absorption performance are optimized. The Ni/BHPC composite material exhibits excellent absorption characteristics at a NiSO4 concentration of 0.2 mol/L. With a thickness of 2.7 mm, the RLmin is −58.504 dB at 10.741 GHz. In the frequency range 8.221–12.4 GHz, with a thickness of 2.9 mm, this reflection loss (RL) is less than −10 dB. These results indicate that incorporating Ni particles into the BHPC enhances its wave absorption efficiency. The research contributes to develop high-performance porous carbon microwave absorption materials from biomass. •The Ni/BHPC has been successfully prepared by electroless plating method.•The structure and nickel particles ensure the excellent absorption performance.•The RLmin of Ni-0.2 with 2.7 mm thickness is − 58.504 dB, EAB is 3.507 GHz.