Novel imprinted nanocapsule with highly enhanced hydrolytic activity for organophosphorus pesticide degradation and elimination

作者：Shi Heguang; Wang Ruiyu; Yang Jixiang; Ren Hongqi; Liu Shuai; Guo Tianying^*

来源：European Polymer Journal, 2015, 72: 190-201.

DOI：10.1016/j.eurpolymj.2015.09.016

• Pesticide degradation
• Molecular imprinting
• Nanocapsule
• Methyl parathion
• p-Nitrophenol

The removal of organophosphorus pesticide residues is of great importance to environment treatment nowadays. In this work, we designed a novel imprinted hollow nanocapsule which could effectively eliminate organophosphorus pesticide residues remained in water environment. The shell of the methyl parathion imprinted nanocapsule was prepared based on a multi-pyridine-ligand functional monomer, N-(4-vinylbenzyl)-di(2-picolyl) amine. The obtained nanocapsule showed a high catalytic efficiency towards methyl parathion, with an initial hydrolysis rate of 3.1 x 10(-2) mM/h, 355-fold relative to the self-hydrolysis of methyl parathion. And a low Km value, 0.6 mM, was observed, indicating a good affinity of functional ligand on the nanocapsule towards methyl parathion. Additionally, the obtained hollow nanocapsule could further remove p-nitrophenol generated in the catalytic degradation system, another hazardous substance, by enriching part of p-nitrophenol in its central cavity.

• 出版日期2015-11
• 单位南开大学