数字农科院2.0

Effective xylan integration for remodeling biochar uniformity and porosity to enhance chemical elimination and CO2 adsorption

文献类型： 外文期刊

作者： Yongtai Wang;Huiyi Zhang;Yunong Li;Hua Yu;Dan Sun;Yujing Yang;Ran Zhang;Li Yu;Fei Ma;Muhammad Nauman Aftab;Liangcai Peng;Yanting Wang

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关键词： Carbon neutralization;Chemical adsorption;Diverse lignocelluloses;Plant evolution;Xylan interlink

期刊名称： International Journal of Biological Macromolecules

ISSN： 0141-8130

年卷期： 2025 年 291 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Although plant evolution has offered diverse biomass resources, the production of high-quality biochar from desirable lignocelluloses remains unexplored. In this study, distinct lignocellulose substrates derived from eight representative plant species were employed to prepare biochar samples under three different temperature treatments. Correlation analysis showed that only hemicellulose was a consistently positive factor of lignocellulose substrates to account for the dye-adsorption capacities of diverse biochar samples. Furthermore, we integrated exo-xylan, a major hemicellulose in higher plants, into lignin-disassociated lignocelluloses to produce the desirable biochar with a uniform and symmetrical structure, resulting in a 5.2-fold increase in surface area (51 to 317 m2/g) and a 5.0-fold increase in total pore volume (0.02 to 0.11 cm3/g micropore, 0.02 to 0.12 cm3/g mesopore). This consequently improved the adsorption capacities of the remodeled biochar, with an increase of 26 % for dual-industry dyes, 90 % for 1579 organic compounds, and 14 % for CO2. Based on the fluorescence observation of xylan-cellulose co-localization and physical-chemical characterization of the remodeled biochar, a novel hypothetical model was proposed to explain how xylan plays an integral role in desired biochar production, providing insights into effective lignocellulose reconstruction and efficient thermochemical catalysis as an integrative strategy to maximize biochar adsorption capacity.

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