One-step synthesis of K3PO4-activated phosphorus-enriched carbons for enhanced carbon capture

文献类型： 外文期刊

第一作者： Zhi, Yue

作者： Zhi, Yue;Yin, Yujia;Ciren, Quji;Hu, Xin;Xiao, Qiang;Zhao, Leihong;Demir, Muslum;Demir, Muslum;Simsek, Utku Bulut;Wang, Linlin

作者机构：

关键词： Phosphorus-doped porous carbons; CO2 adsorption; Lotus petiole biomass; Tripotassium phosphate

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 3 期

页码：

收录情况： SCI

摘要： To date, most studies on porous carbon have focused on enhancing COQ uptake capacity by decorating the carbon surface with nitrogen (N) or sulfur (S) functional groups. However, a literature survey reveals a notable gap in research on phosphorus (P)-doped porous carbon for surface modification. To address this gap, the present study focuses on the synthesis of P-decorated carbons using lotus petiole biomass as a renewable and sustainable precursor. This was achieved through a single-step process involving P-doping and chemical activation with tripotassium phosphate (K3PO4) of carbonized lotus petiole at elevated temperatures. The resulting P-doped porous carbons exhibited advanced textural properties, with a maximum surface area of 472 m2/g, a total pore volume of 0.27 cm3 /g, and phosphorus doping of up to 4.63 wt%. The optimal carbon-based adsorbent demonstrated COQ adsorption capacities of 2.57 mmol/g at 25 degrees C and 3.36 mmol/g at 0 degrees C under 1 bar pressure. Additionally, the materials showed excellent durability, exhibiting almost no change in performance after consecutive adsorption-desorption cycles. These P-doped porous carbons also displayed high COQ/NQselectivity, moderate heat of adsorption, rapid adsorption kinetics, and outstanding dynamic COQ capture performance under continuous gas flow conditions. This study provides a novel and sustainable approach to converting lotus petioles into high-performance adsorbents, with significant implications for achieving carbon neutrality and advancing environmental sustainability.

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