Abstract
Cu nanoparticles are a potential material for creating novel alternative antimicrobial products due to their unique antibacterial/antifungal properties, stability, dispersion, low cost and abundance as well as being economical and ecofriendly. In this work, carboxymethyl cellulose coated core/shell SiO2@Cu nanoparticles (NPs) were synthesized by a simple and effective chemical reduction process. The initial SiO2 NPs, which were prepared from rice husk ash, were coated by a copper ultrathin film using hydrazine and carboxymethyl cellulose (CMC) as reducing agent and stable agent, respectively. The core/shell SiO2@Cu nanoparticles with an average size of ~19 nm were surrounded by CMC. The results indicated that the SiO2@Cu@CMC suspension was a homogenous morphology with a spherical shape, regular dispersion and good stability. Furthermore, the multicomponent SiO2@Cu@CMC NPs showed good antifungal activity against Phytophthora capsici (P. capsici). The novel Cu NPs-based multicomponent suspension is a key compound in the development of new fungicides for the control of the Phytophthora disease.
Highlights
Copper compounds were first used in agriculture in 1761 [1], when it was discovered that a weak copper sulfate solution soaked in cereal seeds could inhibit the growth of fungal pathogens [2]
We report a simple method for the preparation of core/shell SiO2 @Cu@Carboxymethyl cellulose (CMC)
SiO2 @Cu@CMC materials were tested against P. capsici fungi for their antifungal effect
Summary
Copper compounds were first used in agriculture in 1761 [1], when it was discovered that a weak copper sulfate solution soaked in cereal seeds could inhibit the growth of fungal pathogens [2] It was not until the 1880s [2] that the farmers of the Bordeaux region, France, used a mixture of copper sulfate and lime as a fungicide against the downy mildew of grapes. Cu NPs in a solution containing a stable agent can form a protective layer of NPs resulting in the NPs’ less exposure to air oxygen, leading to a reduction of the oxidation process. New approaches and strategies are being developed to control the fungi as well as enhance crop growth and productivity In response to these increasing demands, the application of NPs has received a lot of attention due to its potential to protect plants and enhance plant growth. SiO2 @Cu@CMC materials were tested against P. capsici fungi for their antifungal effect
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