Fabrication of a hollow mesoporous silica hybrid to improve the targeting of a pesticide

Gao, Yunhao; Zhang, Yanhui; He, Shun; Xiao, Yanan; Qin, Xiaoying; Zhang, Yuan; Li, Donglin; Ma, Hao; You, Hong; Li, Jianhong

doi:10.1016/j.cej.2019.01.105

Cited by 136 publications

(92 citation statements)

References 39 publications

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“…Nanocarrier release systems that respond to pH changes are based on the presence of ionizable functional groups in the carrier structure, such as pyrimidines, carboxylates, amines, phosphates, and sulfonates [23, 24]. At certain pH values, depending on the pKa of the carrier or the chemical molecule, the functional groups present a charge, which may be positive or negative, resulting in electrostatic interactions.…”

Section: Types Of Stimuli-responsive Systemsmentioning

confidence: 99%

“…For example, silica nanoparticles present very rapid initial release of the incorporated ingredients, which could limit their applications. However, their surfaces are rich in hydroxyl groups, which permits the functionalization or coating of these carriers [23].…”

Section: Types Of Stimuli-responsive Systemsmentioning

confidence: 99%

“…Other pH-responsive systems have been developed for insecticides. In the study of Gao et al [23], a system of silica nanoparticles coated and functionalized with polystyrene and (trimethoxysilyl)propyl methacrylate was developed for delivery of the insecticide abamectin. The results showed that after 15 days at pH 5 and 7, there was 14–15% release, demonstrating that the system prevented premature release of the insecticide, whereas at pH 10, release of the insecticide reached 39% after 5 h and 87% after 15 days.…”

Section: Applications Of Stimuli-responsive Systems In Agriculturementioning

confidence: 99%

“…In agricultural systems, pH variations occur in soils, in different plant organs, during physiological processes of the plant, and in the maturation of fruits, as well as due to the presence of pathogens or agricultural pests [23, 29]. Therefore, nanocarrier systems able to release active agents in response to pH changes represent a major strategy for the development of new nanopesticides, since the release kinetics is modulated according to pH changes.…”

Section: Applications Of Stimuli-responsive Systems In Agriculturementioning

confidence: 99%

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Development of stimuli-responsive nano-based pesticides: emerging opportunities for agriculture

et al. 2019

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Pesticides and fertilizers are widely used to enhance agriculture yields, although the fraction of the pesticides applied in the field that reaches the targets is less than 0.1%. Such indiscriminate use of chemical pesticides is disadvantageous due to the cost implications and increasing human health and environmental concerns. In recent years, the utilization of nanotechnology to create novel formulations has shown great potential for diminishing the indiscriminate use of pesticides and providing environmentally safer alternatives. Smart nano-based pesticides are designed to efficiently delivery sufficient amounts of active ingredients in response to biotic and/or abiotic stressors that act as triggers, employing targeted and controlled release mechanisms. This review discusses the current status of stimuli-responsive release systems with potential to be used in agriculture, highlighting the challenges and drawbacks that need to be overcome in order to accelerate the global commercialization of smart nanopesticides.

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Section: Types Of Stimuli-responsive Systemsmentioning

confidence: 99%

Section: Types Of Stimuli-responsive Systemsmentioning

confidence: 99%

Section: Applications Of Stimuli-responsive Systems In Agriculturementioning

confidence: 99%

Section: Applications Of Stimuli-responsive Systems In Agriculturementioning

confidence: 99%

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Development of stimuli-responsive nano-based pesticides: emerging opportunities for agriculture

et al. 2019

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“…To protect ACs and improve their efficiency, researchers have developed numerous systems of sustained and controlled AC delivery (Amrita et al 2020). In addition to enhancing the environmental stability and response ability of ACs, these systems decrease environmental toxicity and pollution by reducing the amount of ACs discharged into the environment (Zhao et al 2018;Xu et al 2017;Gao et al 2019;Zhao et al 2019). Sheng et al proposed a thermo controlled pesticide release system composed of a thin film of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) grafted with polydopamine (PDA) microcapsules for the loading of avermectin (Sheng et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin Microspheres 1 Containing Ammonium Hydrogen Carbonate for the Tunable Release of Herbicide

Zhang

Yang

et al. 2021

Preprint

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The major challenge in utilizing pesticides lies in identifying the precise application that would improve the efficiency of these pesticides and reduce their environmental and health hazards at the same time. Such application requires the development of specific formulations that enable controlled, stimuli-responsive release of the pesticides. Gelatin is a relatively cheap material characterized by temperature-sensitivity and abundant amino acid groups, which makes it suitable for the storage and controlled release of pesticides. In this study, gelatin microspheres were prepared by emulsion and cross-linking, then they were loaded with 2,4-dichlorophenoxyacetic acid sodium (2,4-D Na) as a model herbicide. To achieve temperature-tunable release of 2,4-D Na from the microspheres, NH4HCO3 was added to the formulations at different concentrations. The prepared formulations were characterized by SEM, FTIR, and size distribution analyses, and their drug loading capacities were determined. Based on bioassay experiments, the 2,4-D Na-NH4HCO3-loaded gelatin microspheres can effectively control the spread of dicotyledonous weeds. Therefore, the strategy proposed herein can be used to develop novel, effective herbicide formulations.

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Core/Shell Dual‐Responsive Nanocarriers via Iron‐Mineralized Electrostatic Self‐Assembly for Precise Pesticide Delivery

Zhang

Wang

et al. 2021

Adv Funct Materials

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It is desirable for a simple and universal method to synthesize stimuli‐responsive nanocarriers to targeted delivery of pesticides. In this study, a novel pH‐value and laccase dual‐responsive nanopesticide system loaded with lambda‐cyhalothrin (LC) is established by iron mineralization after electrostatic self‐assembly between sodium lignosulphonate (SL) and dodecyl dimethyl benzyl ammonium chloride (DDBAC). These nanoparticles are core–shell structures in which iron mineralization plays a key role in stabilizing the nanoparticles. This synthesis strategy is suitable for encapsulating hydrophobic and low‐volatility compounds. The encapsulation of the nanocarriers prolongs the half‐life of the LC under UV irradiation by 4.4‐fold. After irradiation, the mortality of Agrotis ipsilon treated by the LC@SL/DDBAC/Fe is approximately 39% higher than that treated by emulsifiable concentrate (EC) at the concentration of 1 mg L−1. The dual‐responsive property of lignin‐based nanoplatform to alkalinity and laccase enable cargo release on demand. Although the toxicity of EC and LC@SL/DDBAC/Fe to A. ipsilon is similar, that of LC@SL/DDBAC/Fe to Brachydanio rerio is decreased by 11.57‐fold, and the toxicity selective pressure is enhanced by 11‐fold compared with EC. The SL/DDBAC/Fe nanocarriers represent a simple preparation procedure, excellent environmental safety, and dual‐responsive release profiles and can offer a promising nanoplatform for precise pesticide delivery.

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Fabrication of a hollow mesoporous silica hybrid to improve the targeting of a pesticide

Cited by 136 publications

References 39 publications

Development of stimuli-responsive nano-based pesticides: emerging opportunities for agriculture

Development of stimuli-responsive nano-based pesticides: emerging opportunities for agriculture

Fabrication of Gelatin Microspheres 1 Containing Ammonium Hydrogen Carbonate for the Tunable Release of Herbicide

Core/Shell Dual‐Responsive Nanocarriers via Iron‐Mineralized Electrostatic Self‐Assembly for Precise Pesticide Delivery

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