PDA@Ti₃C₂T_x as a novel carrier for pesticide delivery and its application in plant protection: NIR‐responsive controlled release and sustained antipest activity

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‐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 (η = 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.

PET/ZnO@MXene-Based Flexible Fabrics with Dual Piezoelectric Functions of Compression and Tension

“…The high-resolution XPS spectrum of O 1s can be divided into four distinct peaks in Figure 3 c, with binding energies of 532.7 eV, 531.1 eV, 530.2 eV, and 529.8 eV. The four peaks corresponded to the presence of C-O, C-Ti-(OH) x , Zn-O, and Ti-O, respectively [ 35 , 36 , 37 ]. The high-resolution XPS spectrum of Zn 2p shown in Figure 3 d displayed two fitted peaks at 1044.2 eV and 1021.1 eV, which were assigned to Zn 2p 1/2 and Zn 2p 3/2 , respectively.…”

Formulation of nanopesticide with graphene oxide as the nanocarrier of pyrethroid pesticide and its application in spider mite control

“…For determination of the loading amount, the prepared GO–pesticide nanocomposites were dissolved in deionized water. The pesticide loading content (LC) was obtained with the following equation: 28 LC (%) = W pesticide / W GO × 100, where W pesticide is the weight of pesticide loaded on GO (μg), and W GO is the weight of GO (μg).…”

Tannic Acid-Modified MXene as a Nanocarrier for the Delivery of β-Cyfluthrin as a Sustained Release Insecticide

“…20 Recently, Song and colleagues developed a multifunctional MXene-based PDS for pest control and plant protection application. 21,22 The MXenebased PDS showed stimuli-responsive controlled pesticide release and improved antipest activity, significantly improving the utilization of pesticides. 21,22 In addition, the industrial production of MXenes is in progress, and once large-scale preparation of MXenes is realized with stable quality, their downstream applications will be fully guaranteed.…”

“…21,22 The MXenebased PDS showed stimuli-responsive controlled pesticide release and improved antipest activity, significantly improving the utilization of pesticides. 21,22 In addition, the industrial production of MXenes is in progress, and once large-scale preparation of MXenes is realized with stable quality, their downstream applications will be fully guaranteed. Tannic acid (TA) is a natural plant polyphenol, which has good interfacial affinity.…”

“…The germination rate of maize seeds and the growth times of maize seedlings were used to simply evaluate the phytotoxicity of the nanopesticide. 13,21,22 The experiment steps were similar to the previous literature, and the nanopesticide sample was MXene-TA-β-CYF.…”