吸附
化学
纳米片
活性炭
罗丹明B
化学工程
水溶液中的金属离子
碳纤维
比表面积
聚乙烯亚胺
解吸
核化学
无机化学
材料科学
金属
有机化学
复合材料
光催化
催化作用
基因
生物化学
工程类
转染
复合数
作者
Qihang Wang,Danwei He,Chengyu Li,Zhixin Sun,Jun Matsumoto
标识
DOI:10.1016/j.indcrop.2023.116485
摘要
Adsorption is the most promising method for wastewater purification, but it is limited by the low adsorption efficiency and single adsorption performance of the present adsorbents. Herein, a novel multifunctional adsorbent ([email protected]) for high-efficient adsorption of heavy metal ions and dyes was synthesized using cork activated carbon (CAC) and branched polyethylenimine (BPEI)-modified carbon dots (CDs). CAC is an excellent carrier for CDs-BPEI and can provide strong driving force for the adsorption of contaminants, while CDs-BPEI with numerous amino groups can improve the adsorption capacity and selectivity of the adsorbent for metal ions. The obtained [email protected] had unique honeycomb structure, ultrathin carbon nanosheet wall layer (∼200 nm), well hierarchical porous structure, high specific surface area (1088.97 m2/g). In addition, it contained abundant amino and oxygen-containing groups. The unique structure and surface chemistry of [email protected] contributed to its ultra-high adsorption efficiency for Pb(Ⅱ) (231.48 mg/g, 10 min) and RhB (1734.55 mg/g, 180 min). It is worth mentioning that the adsorption capacity of [email protected] for Pb(Ⅱ) increased by more than 200% compared with that of CAC. Moreover, the resorption efficiency of [email protected] for Pb(Ⅱ) and RhB can reach approximately 82% and 70%, respectively, after five consecutive adsorption-desorption cycles. The high adsorption efficiency, excellent recyclability, and good stability make the [email protected] an ideal adsorbent for wastewater treatment.
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