Journal
PEST MANAGEMENT SCIENCE
Volume 77, Issue 11, Pages 4960-4970Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.6538
Keywords
near-infrared light; Ti3C2Tx; polydopamine; sustained release; photothermal
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Funding
- Discipline and Master's Site Construction Project of Guiyang University by Guiyang City Financial Support Guiyang University
- Jiangsu Province Science and Technology Support Plan [BE2019391]
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Guizhou Biopharmaceutical Engineering Research Center [QJHKYZ[2019]051]
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This study introduces a novel polydopamine surface-modified MXene-Ti3C2Tx nanocarrier for the delivery of pesticides and plant protection. The research shows that the nanocarrier allows for sustained release of the pesticide emamectin benzoate under near-infrared irradiation, providing prolonged antipest activity. Additionally, the nanocarrier and pesticide formulation exhibit good safety with no adverse effects on seed germination and seedling growth.
BACKGROUND Stimuli-responsive pesticide controlled release system provides a new strategy for the development of high-efficiency pesticides formulation. RESULTS In this article, we report a novel polydopamine surface modified MXene-Ti3C2Tx nanocarrier for pesticide delivery and plant protection. Polydopamine modified Ti3C2Tx (PDA@Ti3C2Tx) nanocarrier was prepared by biomimetic self-polymerization of dopamine on the surface of Ti3C2Tx. A typical pesticide, emamectin benzoate (EB), was loaded on PDA@Ti3C2Tx through physisorption process, with a high pesticide loading rate of 45.37%. PDA@Ti3C2Tx exhibited excellent photothermal conversion effect (eta = 34.5%). Under the irradiation of near-infrared (NIR) laser, EB would sustained release from PDA@Ti3C2Tx nanocarrier to surrounding medium. Compared with free EB, EB@PDA@Ti3C2Tx exhibited prolonged persistence period, which can keep antipest activity at 14 days post spraying. In addition, PDA@Ti3C2Tx nanocarrier and EB@PDA@Ti3C2Tx nanoformulation are of good safety, showing no side effect to the seed germination and seedling growth. CONCLUSION This research developed a novel nanocarrier for water-insoluble pesticide delivery, realizing NIR-responsive controlled release and sustained antipest activity.
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