Adhesive and Stimulus-Responsive Polydopamine-Coated Graphene Oxide System for Pesticide-Loss Control

Journal of Agricultural and Food Chemistry
Yujia TongXuemin Wu

Abstract

Pesticide carrier systems are highly desirable in achieving the effective utilization of pesticides and reduction of their loss. In order to increase utilization and enhance pesticide adhesion to harmful targets, adhesive and stimulus-responsive nanocomposites were prepared using graphene oxide (GO) and polydopamine (PDA). The results demonstrated that graphene oxide with a layer of PDA had a high hymexazol-loading capacity. The release curve of hymexazol from the nanocomposite showed that the release was NIR-laser-dependent and pH-dependent. The adhesion-performance investigation demonstrated that Hy-GO@PDA exhibited greater hymexazol persistence than a hymexazol solution after a simulated-rainwash experiment, and it also left more hymexazol residue than a hymexazol solution with a surfactant under high concentrations. Finally, the bioactivity of the prepared hymexazol-loaded nanocomposite was measured against Fusarium oxysporum f. sp. cucumebrium Owen, and it showed an inhibition activity similar to that of the hymexazol solution. All of these revealed that GO with a PDA layer could serve as pesticide carrier to solve low-utilization and wash-off problems, especially for water-soluble pesticides.

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Citations

Sep 23, 2019·Journal of Nanobiotechnology·Marcela Candido CamaraLeonardo Fernandes Fraceto
Jan 16, 2021·Journal of Hazardous Materials·Xuesong CaoBaoshan Xing
Apr 6, 2021·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Ya WangXiaogang Li
May 13, 2021·Advanced Science·Chao-Yi WangYing-Wei Yang
Jun 9, 2021·Chemical Society Reviews·Peng YangYiwen Li
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tejal V PatilKi-Taek Lim
Sep 30, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Ya WangXiaogang Li
Jan 22, 2020·Journal of Agricultural and Food Chemistry·Lihong ZhangDongqing Cai

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