Biomass-derived carbon materials have attracted considerable attention in electromagnetic wave (EMW) absorption applications due to their advantages of low cost, light weight, and sustainability. Herein, bagasse-based porous carbon (BPC) was prepared by canonization and activation process from natural waste bagasse. The porous flower-like MoS2/ BPC composites were successfully prepared for efficient microwave absorption via hydrothermal process by in-situ formation of flower-like MoS2 into the porous structure of BPC. The effect of hydrothermal time and hydrothermal temperature on surface morphology, degree of graphitization, surface chemical composition and impedance matching of the prepared samples was investigated. Results demonstrated that when the hydrothermal temperature was 220 °C, and the hydrothermal time was 24 h, the obtained MoS2/ BPC sample (named as MoS2/ BPC-220 ℃) showed the minimum reflection loss value (RL) of − 41.6 dB at 8.96 GHz and exhibited effective microwave absorption bandwidth (EAB) of 4.32 GHz at a relatively thin thickness of 1.5 mm. This work provides a promising way to prepare novel biomass-derived porous carbon for strong broadband electromagnetic absorption.

Bagasse-based porous flower-like MoS2carbon composites for efficient microwave absorption
    Abstract
        Graphical abstract
    1 Introduction
    2 Experimental section
        2.1 Materials
        2.2 Preparation of bagasse-based porous carbon
        2.3 Preparation of flower-like MoS2BPC-220 ℃
        2.4 Characterization
    3 Results and discussion
        3.1 Characterization of BPC and MoS2BPC-220 ℃ composites
        3.2 Microwave absorption performance
    4 Conclusions
    Acknowledgements 
    References

• Yingxiu Zhang(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Meiran Dou(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Yi Teng(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Xueqiang Fu(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Zhangyong Liu(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Xinzhe Huang(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Meng Wang(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China)
• Lihui Xu(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China, National Innovation Center of Advanced Dyeing & Finishing Technology, Tai’an, Shandong 271000, People’s Republic of China) Corresponding author
• Hong Pan(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, People’s Republic of China, National Innovation Center of Advanced Dyeing & Finishing Technology, Tai’an, Shandong 271000, People’s Republic of China)
• Jiahao Wang(Shanghai International High School of Britain, Australia and New Zealand, Shanghai, China)