Excellent biochar properties are crucial for sorption performance, and a developed pore structure is especially important. Herein, novel porous carbon/porous biochar (PC/PB) composites, in which the porous biochar and porous carbon were prepared at the same time, were synthesized via a green method from algal biomass with the help of the self-activation of citrate for the first time, and the composites were evaluated for the sorption of sulfamethoxazole (SMX). Many micro/meso/macropores were introduced into the PC/PB composites, which showed high specific surface areas (up to 1415 m²/g) and pore volumes (up to 1.08 cm³ g⁻¹). The PC/PB composites displayed excellent SMX sorption capacities, which reached 844 mg g⁻¹. Pore filling played a crucial role in determining the sorption capacity, and hydrogen bonding, electrostatic interactions and π-π stacking controlled the sorption rate. This study provides an improved method for preparation of porous biochar.

优异的生物炭性能对于吸附性能至关重要，发达的孔隙结构尤为重要。在此，新型多孔碳/多孔生物炭（PC / PB）复合材料，其中多孔生物炭和多孔碳同时制备，通过绿色方法从藻类生物质中借助柠檬酸盐的自活化作用合成用于第一次，并评估了复合材料对磺胺甲恶唑（SMX）的吸附。PC/PB 复合材料中引入了许多微孔/中孔/大孔，显示出高比表面积（高达 1415 m ² /g）和孔体积（高达 1.08 cm ³ g ^-1）。PC/PB 复合材料表现出优异的 SMX 吸附能力，达到 844 mg g ^-1. 孔隙填充在决定吸附能力方面起着至关重要的作用，而氢键、静电相互作用和 π-π 堆积控制着吸附速率。本研究为多孔生物炭的制备提供了一种改进的方法。