Research
| Title： | Biomass-derived N/S dual-doped hierarchically porous carbon material as effective adsorbent for the removal of bisphenol F and bisphenol S |
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| First author： | Wang, Tao; Xue, Lu; Zheng, Lewen; Bao, Shaopan; Liu, Yonghong; Fang, Tao; Xing, Baoshan |
| Journal： | JOURNAL OF HAZARDOUS MATERIALS |
| Years： | 2021 |
| DOI： | 10.1016/j.jhazmat.2021.126126 |
| Abstract： | Biomass-derived heteroatom-doped porous carbon-based materials are emerging as low-cost adsorbents for removing common pollutants, although the adsorption performance is still unsatisfactory and the main adsorption mechanisms are still controversial. Herein, we report a facile and general method for fabricating biomass-derived N/S dual-doped hierarchically porous carbon adsorbent (MZ-NSPC). The MZ-NSPC material exhibits excellent adsorption capacity (295.8 mg/g for bisphenol F (BPF), 308.7 mg/g for bisphenol S (BPS)), short equilibrium time (30 min), and good reusability (the decline efficiency < 6.15% after five times). The remarkable adsorption performance originates from a large BET surface area, hierarchically porous structure, and N/S heteroatoms dual-doping. Combined with comparative experiments and density functional theory (DFT) calculations, we revealed that the doped N, S heteroatoms played a synergistic effect which promoted the adsorption performance and adsorption sites are mainly the oxidized-S and pyridinic-N. Importantly, for BPF, the proportion contribution of different mechanisms followed the order of hydrophobic interaction > pi-pi interaction > hydrogen bonding interaction. However, adsorption mechanism of BPS was mainly controlled by pi-pi interaction. This work not only promotes the development of low-cost and sustainable heteroatom-doped carbonbased materials, but also systematically studies adsorption mechanism of heteroatom-doped carbon-based materials for bisphenols. |
