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<p>3D formicary-like carbon was fabricated by using lotus leaf stem as renewable carbon precursor via a facile and easy-scale up route of carbonization and KOH activation. The resultant carbon exhibited 3D hierarchical porous architecture with high surface area and cross-linked voids in macro/meso/micro-size and proper pore size distribution, along with the favorable co-doping of O-N-S heteroatoms. These features endowed constructive coordination for high-performance dye absorbent with an ultra-high adsorption capacity of 6939&#xa0;mg&#xa0;g<sup>−1</sup> for Rhodamine B. The adsorption of dye onto as-fabricated carbon was a spontaneous endothermic process, and complied with pseudo-second kinetic model and Langmuir isotherm model, respectively. The cohesion between adsorbate and adsorbent was proposed to be π-π stacking, hydrogen bond and acid–base interactions for the high dye capacity. These data indicated the great potentiality to convert green biomass into advanced carbon for the wastewater purification.</p>

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3D Formicary-like Carbon Derived from Lotus Leaf Stem for High-performance Textile Dye Adsorbent

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Nan Jiang,
  • Tianxiao Ma,
  • Xiaohui Zhong,
  • Yiming Ren,
  • Huan Liu

摘要

3D formicary-like carbon was fabricated by using lotus leaf stem as renewable carbon precursor via a facile and easy-scale up route of carbonization and KOH activation. The resultant carbon exhibited 3D hierarchical porous architecture with high surface area and cross-linked voids in macro/meso/micro-size and proper pore size distribution, along with the favorable co-doping of O-N-S heteroatoms. These features endowed constructive coordination for high-performance dye absorbent with an ultra-high adsorption capacity of 6939 mg g−1 for Rhodamine B. The adsorption of dye onto as-fabricated carbon was a spontaneous endothermic process, and complied with pseudo-second kinetic model and Langmuir isotherm model, respectively. The cohesion between adsorbate and adsorbent was proposed to be π-π stacking, hydrogen bond and acid–base interactions for the high dye capacity. These data indicated the great potentiality to convert green biomass into advanced carbon for the wastewater purification.