Excellent sustained-release efficacy of herbicide quinclorac with cationic covalent organic frameworks

被引：74
作者：
Deng, Xile [1 ]
Zhao, Pengyue [2 ]
Zhou, Xiaomao [1 ]
Bai, Lianyang [1 ]
机构：
[1] Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, State Key Lab Hybird Rice, Key Lab Biol & Control Weeds, 2 Yuanda Rd, Changsha 410125, Peoples R China
[2] Chinese Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crops, Minist Agr, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2021年 / 405卷
基金：
中国国家自然科学基金;
关键词：
Covalent organic frameworks; Control release; Nanosheets; Quinclorac; Barnyard grass; MESOPOROUS SILICA NANOPARTICLES; ECHINOCHLOA-CRUS-GALLI; DERIVATIVES; NANOSHEETS; MIXTURES; TOXICITY;
D O I：
10.1016/j.cej.2020.126979
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Ethidium bromide-based covalent organic frameworks (EB-COFs) possess excellent stability and strong adsorption capacities due to their rich cationic charge in the porous structures, making them potential drug release carriers. In this research, EB-COFs nanosheets were prepared for loading and controlling the release of quinclorac (QNC) by mechanical delamination. The loading capacity of QNC into EB-COFs was determined as 41% (w/w). Compared to QNC technical concentrate (TC), the as-obtained stimuli-responsive nanosheets displayed prior controlled-release characteristics. Furthermore, QNC-loaded EB-COFs nanosheets displayed excellent herbicide activities against barnyard grass (Echinochloa crusgalli), when compared to QNC TC. In sum, herbicidal COFs nanosheets look potential as a novel efficient delivery system for pesticide formulations.
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页数：10
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