A near infrared light (NIRL)-driven release imidacloprid (NDRI) with magnetic collectability property was constructed using agarose hydrogel (AG), CuS-polydopamine (CP), zeolitic imidazolate framework-8 (ZIF-8), imidacloprid (IM), and ferriferrous oxide (Fe₃O₄). Therein, ZIF-8 with a large specific surface area was used to efficiently load IM molecules. CP, as a photothermal agent, could soften AG and enlarge the pores in hydrogel spheres under NIRL, resulting in the release of IM. After release, Fe₃O₄ was beneficial to conveniently collect the remaining NDRI from water. Additionally, the AG hydrogel with a porous structure acted as a good carrier for NDRI. Importantly, NDRI possessed an outstanding controlled-release property and could be reutilized at least for four times. Consequently, this technology may provide a potential approach to control release of IM, improve utilization efficiency, and decline pesticide usage and contamination to environment.

使用琼脂糖水凝胶（AG），CuS-聚多巴胺（CP），沸石咪唑啉骨架8（ZIF-8），吡虫啉（IM），和氧化亚铁（Fe ₃ O ₄）。其中，具有大的比表面积的ZIF-8被用于有效地装载IM分子。CP作为一种光热剂，可以在NIRL下软化AG并扩大水凝胶球体中的孔，导致IM的释放。释放后，Fe ₃ O ₄有利于方便地从水中收集剩余的NDRI。此外，具有多孔结构的AG水凝胶可作为NDRI的良好载体。重要的是，NDRI具有出色的控释特性，并且至少可以重复使用四次。因此，该技术可能提供一种控制IM释放，提高利用效率并减少农药使用和对环境污染的潜在方法。