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Cyclodextrin polymer-valved MoS2-embedded mesoporous silica nanopesticides toward hierarchical targets via multidimensional stimuli of biological and natural environments
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-06-13 , DOI: 10.1016/j.jhazmat.2021.126404
Jiangtao Dong 1 , Wang Chen 2 , Dunzhong Qin 3 , Yuxia Chen 1 , Jun Li 4 , Chen Wang 1 , Yeqing Yu 1 , Jianguo Feng 2 , Xuezhong Du 1
Affiliation  

Targeted delivery of pesticides towards pests and pathogens can significantly improve the bioavailability and efficacy of pesticides and minimize the impact on the environment. Cyclodextrin polymer (CDP)-valved, benzimidazole functionalized, MoS2-embedded mesoporous silica (MoS2@MSN@CDP) nanopesticides were constructed toward hierarchical biological targets of pests, pathogens, and foliage. The splash and bounce of the aqueous droplets containing MoS2@MSN@CDP nanoparticles in the presence of Aersosol OT on superhydrophobic surfaces were well inhibited available for excellent wetting to prevent pesticides from losing to the environment. The multivalent supramolecular nanovalves between CDP and the functionalized benzimidazole moieties could be activated for the controlled release of pesticides in the cases of low pH and α-amylase. It is the first time to report the foliage-triggered controlled release of pesticides, owing to the competitive binding of epicuticular wax components to CDP. Furthermore, thermogenic MoS2 cores triggered the controlled release of pesticides under irradiation of near infrared light. The fungicidal efficacies of the stimuli-responsive nanopesticides against pathogenic fungi Rhizoctonia solani and Fusarium graminearum were demonstrated. It is clear that the smart nanopesticides could realize the controlled release of pesticides toward hierarchical biological targets for enhanced pesticide bioavailability and efficacy via the multidimensional stimuli of pH, α-amylase, epicuticular waxes, and sunlight.



中文翻译:

环糊精聚合物阀二硫化钼嵌入介孔二氧化硅纳米农药通过生物和自然环境的多维刺激朝向分级目标

有针对性地向害虫和病原体输送农药可以显着提高农药的生物利用度和药效,并最大限度地减少对环境的影响。环糊精聚合物 (CDP) 阀、苯并咪唑功能化、MoS 2嵌入的介孔二氧化硅 (MoS 2 @MSN@CDP) 纳米农药被构建为针对害虫、病原体和叶子的分级生物目标。含有 MoS 2 的水滴的飞溅和反弹@MSN@CDP 纳米粒子在超疏水表面上存在气溶胶 OT 时被很好地抑制,可用于出色的润湿,以防止农药流失到环境中。CDP和功能化苯并咪唑部分之间的多价超分子纳米阀可以被激活,在低pH和α-淀粉酶的情况下控制释放农药。由于表皮蜡成分与 CDP 的竞争性结合,这是第一次报告农药的叶子触发控释。此外,产热MoS 2核心在近红外光照射下触发了农药的受控释放。针对病原真菌刺激应答nanopesticides的杀菌功效纹枯病已证明禾谷镰刀菌。很明显,智能纳米农药可以通过pH、α-淀粉酶、表皮蜡和阳光的多维刺激,实现农药向分级生物靶标的控释,以提高农药的生物利用度和药效。

更新日期:2021-06-19
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