期刊
NANOMATERIALS
卷 13, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano13081298
关键词
inorganic skeleton; mechanic properties; biochar; adsorption performance
Biochar is a promising candidate for sustainable energy systems and environmental technology applications, but improving its mechanical properties remains a challenge. In this study, a generic strategy to enhance the mechanical properties of bio-based carbon materials through inorganic skeleton reinforcement is proposed. Silane, geopolymer, and inorganic gel are used as precursors, and the composites are characterized. Two types of inorganic skeleton reinforcement mechanisms are employed to improve the mechanical properties. The prepared carbon materials show a significant improvement in mechanical strength and excellent adsorption performance for methylene blue dye.
Biochar is considered as a promising candidate for emerging sustainable energy systems and environmental technology applications. However, the improvement of mechanical properties remains challenges. Herein, we propose a generic strategy to enhance the mechanical properties of bio-based carbon materials through inorganic skeleton reinforcement. As a proof-of-concept, silane, geopolymer, and inorganic gel are selected as precursors. The composites' structures are characterized and an inorganic skeleton reinforcement mechanism is elucidated. Specifically, two types of reinforcement of the silicon-oxygen skeleton network formed in situ with biomass pyrolysis and the silica-oxy-al-oxy network are constructed to improve the mechanical properties. A significant improvement in mechanical strength was achieved for bio-based carbon materials. The compressive strength of well-balanced porous carbon materials modified by silane can reach up to 88.9 kPa, geopolymer-modified carbon material exhibits an enhanced compressive strength of 36.8 kPa, and that of inorganic-gel-polymer-modified carbon material is 124.6 kPa. Moreover, the prepared carbon materials with enhanced mechanical properties show excellent adsorption performance and high reusability for organic pollutant model compound methylene blue dye. This work demonstrates a promising and universal strategy for enhancing the mechanical properties of biomass-derived porous carbon materials.
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