Zhao Songlin, Chen Fushan, Zhu Xiandi, Liu Weijun, Wu Chenlin, Zhang Jie, Ren Shibin, Yan Zhengzhong, Cao Wenli, Zhang Qunfeng, Li Xiaonian
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China; Department of Chemistry, School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, Zhejiang, China.
Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, Jiangxi, China.
J Hazard Mater. 2021 Jul 5;413:125299. doi: 10.1016/j.jhazmat.2021.125299. Epub 2021 Feb 10.
In this study, a novel hierarchically porous N-doped carbon (HPNC) material was successfully prepared by soft-templating method. The commercial triblock copolymer of Pluronic F127 and a polyazine derived from hydrazine hydrate & glyoxal were used as soft template and precursor, respectively. The obtained materials were fully characterized and tested as a sorbent for the removal of hydrophilic dyes of Methylene blue (MB), Basic Fuchsin (BF), Eosin Y (EY) and Rhodamine B (RB) from their aqueous effluents. According to the characterization results, the synthesized material of HPNC-1000 presented thick fibrous morphology with micron size in diameter, hierarchically porous structure with surface area of 1853 m/g, pore volume of 1.59 cm/g and nitrogen content of 4.5 wt%. Adsorption-desorption investigation reveals that synergistic effect of hydrophobic interaction and hydrogen-bonding formation of the dye molecules with the sorbent was most pronounced in the adsorptions. The maximum adsorption capacities for MB, BF, EY and RB reached 0.83, 0.92, 1.23 and 1.83 mmol g, respectively. The adsorption processes well fitted by the pseudo first-order kinetic model and the Liu's isotherm. The sorbent can be regenerated by above 90% of the initial adsorption efficiency after six regeneration cycles.
在本研究中，通过软模板法成功制备了一种新型的分级多孔氮掺杂碳（HPNC）材料。分别使用商业三嵌段共聚物Pluronic F127和由水合肼与乙二醛衍生的聚嗪作为软模板和前驱体。对所得材料进行了全面表征，并测试了其作为吸附剂从水性流出物中去除亚甲基蓝（MB）、碱性品红（BF）、曙红Y（EY）和罗丹明B（RB）等亲水性染料的性能。根据表征结果，合成的HPNC-1000材料呈现出直径为微米级的粗纤维形态、分级多孔结构，比表面积为1853 m²/g，孔体积为1.59 cm³/g，氮含量为4.5 wt%。吸附-解吸研究表明，在吸附过程中，染料分子与吸附剂之间的疏水相互作用和氢键形成的协同效应最为显著。对MB、BF、EY和RB的最大吸附容量分别达到0.83、0.92、1.23和1.83 mmol/g。吸附过程很好地符合准一级动力学模型和刘等温线。经过六个再生循环后，吸附剂可以以高于初始吸附效率90%的效率进行再生。
