Open AccessSynthesis, characterization and evaluation of copper nanoparticles as agrochemicals against Phytophthora spp.
Author(s) -
Hoang Minh Hao,
Cao Van Du,
Duong Thi Ngoc Dung,
Cao Xuan Chuong,
Nguyễn Thị Phương Phong,
Nguyen Huu Tri,
Pham Thi Bich Van
Publication year - 2019
Publication title -
khoa học và công nghệ: tự nhiên
Language(s) - English
Resource type - Journals
ISSN - 2588-106X
DOI - 10.32508/stdjns.v2i6.843
Subject(s) - trisodium citrate , reducing agent , polyvinylpyrrolidone , copper , nuclear chemistry , nanoparticle , dispersant , transmission electron microscopy , materials science , chemistry , nanotechnology , dispersion (optics) , metallurgy , organic chemistry , physics , optics
By using water as a solvent, copper nanoparticles (CuNPs) have been synthesized from copper sulfate via chemical reduction method in the presence of trisodium citrate dispersant and polyvinylpyrrolidone (PVP) as capping agent. The effects of the experimental parameters such as the concentration of reducing agent (NaBH4), reaction temperature, molar ratio of citrate/Cu2+ and weight percentage ratios of Cu2+/PVP on the CuNP sizes were studied. The size of CuNPs in a range of 31 nm was obtained at NaBH4 concentration of 0.2 M, 50oC, citrate/Cu2+ molar ratio of 1.0 and Cu2+/PVP weight percentage of 5%. The colloidal CuNPs were characterized by using UV–Visible spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. The colloidal solution of CuNPs (3±1 nm) was investigated the potential against Phytophthora spp. which cause economically crop diseases. Under in vitro test conditions, the inhibition of Phytophthora spp. mycelia growth at three concentrations of CuNPs (10, 20, 30 ppm) after 48 hours are 90.18%, 91.87% and 100%, respectively. These results provided a simple and economical method to develop the CuNPs-based-fungicide.