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Số người truy cập: 107,324,694
[Biosynthesis, characterization and photocatalytic activity of copper/copper oxide nanoparticles produced using aqueous extract of lemongrass leaf
Tác giả hoặc Nhóm tác giả:
Hai Tu Le
Nơi đăng:
Journal of Composite Materials;
S
ố:
Vol. 3, No. 1;
Từ->đến trang
: 30-35;
Năm:
2019
Lĩnh vực:
Khoa học;
Loại:
Bài báo khoa học;
Thể loại:
Quốc tế
TÓM TẮT
The paper presents a green, simple and eco-friendly method to synthesize copper/copper oxide nanoparticles (Cu/CuO-NPs) from CuSO4 solution using aqueous extract of lemongrass leaf as the reducing and capping agent. The influence of some factors such as the volume ratio of lemongrass leaf extract and CuSO4 solution, pH and temperature to the synthesis of Cu/CuO-NPs were investigated. The results showed that the formation of stable Cu/CuO-NPs was rapid. CuSO4 solution changed from light blue to yellowish green colour after adding aqueous extract of lemongrass leaf. The formation of Cu/CuO-NPs was confirmed by UV-Vis spectroscopy. In this research, transmission electron microscopy (TEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) techniques were used to determine the morphology and crystalline phase of Cu/CuO-NPs. The obtained Cu/CuO-NPs were spherical, with the size ranging from 5.67 to 9.10 nm. The photocatalytic activity of the synthesized Cu/CuO-NPs was examined via degradation process of methylene blue under sunlight irradiation.
ABSTRACT
The paper presents a green, simple and eco-friendly method to synthesize copper/copper oxide nanoparticles (Cu/CuO-NPs) from CuSO4 solution using aqueous extract of lemongrass leaf as the reducing and capping agent. The influence of some factors such as the volume ratio of lemongrass leaf extract and CuSO4 solution, pH and temperature to the synthesis of Cu/CuO-NPs were investigated. The results showed that the formation of stable Cu/CuO-NPs was rapid. CuSO4 solution changed from light blue to yellowish green colour after adding aqueous extract of lemongrass leaf. The formation of Cu/CuO-NPs was confirmed by UV-Vis spectroscopy. In this research, transmission electron microscopy (TEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) techniques were used to determine the morphology and crystalline phase of Cu/CuO-NPs. The obtained Cu/CuO-NPs were spherical, with the size ranging from 5.67 to 9.10 nm. The photocatalytic activity of the synthesized Cu/CuO-NPs was examined via degradation process of methylene blue under sunlight irradiation.
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