TY - JOUR
T1 - Synthesis of Yolk-Shell Magnetic Porous Organic Nanospheres for Efficient Removal of Methylene Blue from Water
AU - Zhou, Minghong
AU - Wang, Tianqi
AU - He, Zidong
AU - Xu, Yang
AU - Yu, Wei
AU - Shi, Buyin
AU - Huang, Kun
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/2/4
Y1 - 2019/2/4
N2 - Herein, we propose a synthesis of yolk-shell magnetic porous organic nanospheres (YS-MPONs) by combining hyper-cross-linking mediated self-assembly method with ship-in-bottle technology. Yolk-shell structure could be facilely produced by controlling the loading amount of single iron precursors (FeSO 4 ) in the hollow cavity of nanospheres. The resulting YS-MPONs nanocomposites possess a micro- and mesoporous structure, high surface area, excellent magnetic response and good chemical inertness. Because lots of carboxylate anions as end-groups were formed in the cavity after degradation of polylactide block, the obtained YS-MPONs as a sorbent showed the good adsorption performance for cationic dyes in aqueous solution. Adsorption kinetics for removal of methylene blue (MB) revealed that the adsorption rate was suitable for the pseudo-second-order rate model, while the adsorption isotherm fitted the Freundlich model. Owing to the higher surface area and larger pore volume, the YS-MPONs showed a better adsorption capacity (134 mg/g vs 104 mg/g of CS-MPONs) for MB dyes. In addition, YS-MPONs adsorbents can be magnetically separated and show the excellent reusability, being effective after at five consecutive cycles.
AB - Herein, we propose a synthesis of yolk-shell magnetic porous organic nanospheres (YS-MPONs) by combining hyper-cross-linking mediated self-assembly method with ship-in-bottle technology. Yolk-shell structure could be facilely produced by controlling the loading amount of single iron precursors (FeSO 4 ) in the hollow cavity of nanospheres. The resulting YS-MPONs nanocomposites possess a micro- and mesoporous structure, high surface area, excellent magnetic response and good chemical inertness. Because lots of carboxylate anions as end-groups were formed in the cavity after degradation of polylactide block, the obtained YS-MPONs as a sorbent showed the good adsorption performance for cationic dyes in aqueous solution. Adsorption kinetics for removal of methylene blue (MB) revealed that the adsorption rate was suitable for the pseudo-second-order rate model, while the adsorption isotherm fitted the Freundlich model. Owing to the higher surface area and larger pore volume, the YS-MPONs showed a better adsorption capacity (134 mg/g vs 104 mg/g of CS-MPONs) for MB dyes. In addition, YS-MPONs adsorbents can be magnetically separated and show the excellent reusability, being effective after at five consecutive cycles.
KW - Hierarchically porous structure
KW - Hyper-cross-linking mediated self-assembly
KW - Ship-in-bottle
KW - Sorbent
KW - Yolk-shell magnetic porous organic nanospheres
UR - https://www.scopus.com/pages/publications/85061082116
U2 - 10.1021/acssuschemeng.8b01807
DO - 10.1021/acssuschemeng.8b01807
M3 - 文章
AN - SCOPUS:85061082116
SN - 2168-0485
VL - 7
SP - 2924
EP - 2932
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 3
ER -
