<scp>PDA</scp>@<scp>Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub></scp> as a novel carrier for pesticide delivery and its application in plant protection: <scp>NIR‐responsive</scp> controlled release and sustained antipest activity
Wenneng Wu, Minghui Wan, Qiang Fei, Yu Tian, Saijie Song, He Shen, Jian Shen
Abstract
Abstract 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‐Ti 3 C 2 T x nanocarrier for pesticide delivery and plant protection. Polydopamine modified Ti 3 C 2 T x (PDA@Ti 3 C 2 T x ) nanocarrier was prepared by biomimetic self‐polymerization of dopamine on the surface of Ti 3 C 2 T x . A typical pesticide, emamectin benzoate (EB), was loaded on PDA@Ti 3 C 2 T x through physisorption process, with a high pesticide loading rate of 45.37%. PDA@Ti 3 C 2 T x exhibited excellent photothermal conversion effect ( η = 34.5%). Under the irradiation of near‐infrared (NIR) laser, EB would sustained release from PDA@Ti 3 C 2 T x nanocarrier to surrounding medium. Compared with free EB, EB@PDA@Ti 3 C 2 T x exhibited prolonged persistence period, which can keep antipest activity at 14 days post spraying. In addition, PDA@Ti 3 C 2 T x nanocarrier and EB@PDA@Ti 3 C 2 T x 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.