文献类型：期刊文献

英文题名：Isosorbide-based cyclomatrix polyphosphazene for high-efficient and selective adsorption of cationic dyes: Experimental and computational studies

作者：Li, Jinjin[1];Ma, Hongchao[1];Shen, Junyao[1];Liu, Ruyue[1];Zhu, Zhihua[1];Zhao, Ling[1];Xi, Zhenhao[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：598

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20222412214155);WOS:【SCI-EXPANDED(收录号:WOS:000817811600001)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No. 21978089) , the Program of Shanghai Academic/Technology Researcher Leader (Grant No. 21XD1433000) , the Funda-mental Research Funds for the Central Universities (Grant No. 22221818010) , and the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-21C04) .

语种：英文

外文关键词：Cyclomatrix polyphosphazene; Isosorbide; Selective adsorption; Cationic dyes; Adsorption kinetics

摘要：A novel bio-based cyclomatrix polyphosphazene microsphere, namely poly(cyclotriphosphazene-co-isosorbide) (HISP), for efficient cationic-dyes adsorption was prepared by solvothermal method using hexachlorocyclotriphosphazene (HCCP) and isosorbide (IS). The chemical structure and morphology of HISP microsphere were characterized by Fourier transform infrared (FTIR), solid-state 31P nuclear magnetic resonance (NMR) spectroscopy, X-Ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The adsorption study towards different organic dyes and their mixtures showed that HISP exhibits an over 850 mg/g adsorption capacity for cationic dyes (e.g., rhodamine B (RhB), methylene blue (MB), and bismarck brown Y (BY)), respectively, and highly selective adsorption ability for MB. Using the adsorption of MB as a model system, the results show that alkaline condition is able to promote the adsorption performance. A high adsorption capacity of 1143.6 mg/g can be obtained towards 200 mg/L MB solution at 25 degrees C and pH = 10 using 6 mg of HISP. Adsorption kinetics and isotherm studies indicate that the adsorption behavior of HISP can be well described by pseudo-second-order kinetic model and Langmuir isotherm model. Importantly, the adsorption mechanism of HISP was demonstrated to be the electrostatic attractions derived from the numerous electron-rich O atoms in isosorbide, which was clarified by the electrostatic screening experiment and density functional theory (DFT) calculation. This systematic work paves a path to the preparation of highly selective dye adsorbents.