Green Carbon Dots/CaCO3/Abamectin Colloidal Pesticide Formulation for Safer and More Effective Pest Management

IF 15.8 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ACS Nano Pub Date : 2024-12-21 DOI:10.1021/acsnano.4c12707
Chuang Chen, Guopeng Teng, Weicheng Shen, Yijun Lu, Yuwei Jin, Xue Yuan, Kang Chen, Yue Yuan, Zhengyan Wu, Jia Zhang
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引用次数: 0

Abstract

An ideal green leaf-deposited pesticide formulation should offer advantages such as good water dispersibility, strong foliar affinity, sustained or controlled release of active ingredients, photostability and rain-fastness, minimal nontarget toxicity, use of nontoxic organic solvents, and degradable adjuvants. In line with this objective, we present green preparation of a colloidal pesticide formulation using optimized lysine-derived carbon dots (LysCDs)-modified CaCO3 (LysCDs/CaCO3) particles as the carrier and abamectin (Abm) as the active ingredient. The loading capacity of abamectin in this colloidal pesticide (LysCDs/CaCO3/Abm) is 1.7 to 2.1 times higher than that of its counterpart (CaCO3/Abm) prepared without LysCDs, which is attributed to the increased specific surface area and pore volume of LysCDs/CaCO3 particles. Due to the acid-induced degradation of CaCO3, the release of abamectin for LysCDs/CaCO3/Abm is accelerated under weakly acidic conditions, which is accompanied by the release of Ca2+ ions and the fluorescence changes of LysCDs. The incorporation of LysCDs enhances the photostability and foliar adhesiveness of this colloidal pesticide, resulting in the highest degree of foliar retention when exposed to ultraviolet (UV) light or rainfall, compared to free-form abamectin and CaCO3/Abm. This results in the best performance of pest control on Plutella xylostella for LysCDs/CaCO3/Abm in both indoor and outdoor tests. Nontarget biocompatibility evaluations show that LysCDs/CaCO3/Abm exhibits lower acute toxicity to zebrafish and earthworms than free-form abamectin. In addition, this colloidal pesticide is favored by the minimal residue of the adjuvant material after abamectin release, which is converted into harmless Ca2+ ions, CO2, and LysCDs. Therefore, this work designs a safer and more effective colloidal pesticide formulation to deliver abamectin with minimal adjuvant residue, realizing its trajectory as basically “circular and green”.

Abstract Image

绿色碳点/CaCO3/阿维菌素胶体杀虫剂配方,实现更安全、更有效的害虫管理
理想的绿叶农药制剂应具有良好的水分散性、强叶面亲和性、有效成分的缓释或控释、光稳定性和耐雨性、最小的非靶毒性、使用无毒有机溶剂和可降解佐剂等优点。本研究以优化后的赖氨酸衍生碳点(LysCDs)修饰CaCO3 (LysCDs/CaCO3)颗粒为载体,以阿维菌素(Abm)为活性成分,绿色制备了一种胶体农药制剂。该胶体农药(LysCDs/CaCO3/Abm)中阿维菌素的载药量比未添加LysCDs的胶体农药(CaCO3/Abm)的载药量高1.7 ~ 2.1倍,这是由于LysCDs/CaCO3颗粒的比表面积和孔体积增大所致。由于酸诱导CaCO3降解,在弱酸性条件下,LysCDs/CaCO3/Abm中阿维菌素的释放加快,同时伴随着Ca2+离子的释放和LysCDs的荧光变化。与自由形式的阿维菌素和CaCO3/Abm相比,LysCDs的掺入增强了这种胶体农药的光稳定性和叶面粘附性,当暴露于紫外线(UV)光或降雨时,其叶面保留程度最高。结果表明,在室内和室外试验中,LysCDs/CaCO3/Abm对小菜蛾的防治效果最好。非靶标生物相容性评价表明,LysCDs/CaCO3/Abm对斑马鱼和蚯蚓的急性毒性低于自由形式的阿维菌素。此外,这种胶体农药的优点是阿维菌素释放后佐剂物质残留极少,转化为无害的Ca2+离子、CO2和LysCDs。因此,本工作设计了一种更安全、更有效的胶体农药配方,以最小的佐剂残留递送阿维菌素,实现其基本“循环、绿色”的轨迹。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Nano
ACS Nano 工程技术-材料科学:综合
CiteScore
26.00
自引率
4.10%
发文量
1627
审稿时长
1.7 months
期刊介绍: ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.
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