Green synthesis and characterization of cuprous oxide nanoparticles in presence of a bio-surfactant

• Autorzy: Behera M , Giri G

Identyfikatory

DOI

10.2478/s13536-014-0255-4

• Języki publikacji: EN

Abstrakty

EN

Herein, we report a facile green synthesis of Cu2O nanoparticles (NPs) using copper sulfate as precursor salt and hydrazine hydrate as reducing agent in presence of bio-surfactant (i.e. leaves extract of arka – a perennial shrub) at 60 to 70 °C in an aqueous medium. A broad band centered at 460 nm in absorption spectrum reveals the formation of surfactant stabilized Cu2O NPs. X-ray diffraction pattern of the surfactant stabilized NPs suggests the formation of only Cu2O phase in assistance of a bio-surfactant with the crystallite size of ∼8 nm. A negative zeta potential of −12 mV at 8.0 pH in surfactant stabilized Cu2O NPs hints non-bonding electron transfer from O-atom of saponin to the surface of NP. Red-shift in the vibrational band (Cu–O stretching) of Cu2O from 637 cm−1to 640 cm−1 in presence of bio-surfactant suggests an interfacial interaction between NPs and O-atoms of –OH groups of saponin present in the plant (i.e. Calotropis gigantea) extract. From X-ray photoelectron spectroscopy spectra, a decrease in binding energy of both 2p3/2and 2p1/2 bands in Cu2O with saponin molecules as compared to bulk Cu atom reveals a charge transfer interaction between NP and saponin surfactant molecules. Transmission electron microscopy images show crystalline nature of Cu2O NPs with an fcc lattice.

Słowa kluczowe

EN

green synthesis; transition metal oxide; biosurfactant; zeta potential; charge transfer

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2014
• Tom: Vol. 32, No. 4
• Strony: 702--708
• Opis fizyczny: Bibliogr. 27 poz., rys., wykr.

Twórcy

autor

Behera M

• Silicon Institute of Technology, Silicon Hills, Bhubaneswar, Odisha-751 024, India

autor

Giri G

• Silicon Institute of Technology, Silicon Hills, Bhubaneswar, Odisha-751 024, India

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