K.R. Basavalingaiah; Udayabhanu; S. Harishkumar; G. Nagaraju
Abstract
Cu2O and Ag-Cu2O nanoparticles were prepared via reflux method using EDTA. From the PXRD, FTIR, UV-DRS studies the synthesized NPs were characterized. The morphologies of the prepared NPs were studied by SEM and TEM analysis. The synthesized NPs were tested for photocatalytic and photoluminescence studies. ...
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Cu2O and Ag-Cu2O nanoparticles were prepared via reflux method using EDTA. From the PXRD, FTIR, UV-DRS studies the synthesized NPs were characterized. The morphologies of the prepared NPs were studied by SEM and TEM analysis. The synthesized NPs were tested for photocatalytic and photoluminescence studies. The PXRD data indicated that the synthesized nanoparticles belong to cubic phase structure and space group Pn-3m. The SEM data revealed that cube like structure were obtained. Cu2O and Ag-Cu2O Nps were taken for determine the photocatalytic activity study on methylene blue dye, the results indicated that Ag-Cu2O NPs exhibited promising photocatalytic activity. This is due to occurrence of Ag particles on the Cu2O material, which makes the catalyst more sensitive. Furthermore, a photoluminescence study reveals that Cu2O and Ag-Cu2O nano particles shown yellow light emission. Copyright © VBRI Press.
Yu-Min Shen; Dipti. R. Sahu;Jow-Lay Huang; Wen-Fang Chiu; Sheng-Chang Wang; Pramoda K. Nayak
Abstract
Various pore sizes of a porous alumina membrane were fabricated using H2SO4 and H2C2O4 electrolyte under different ionization voltages. Cu nanowire arrays with high aspect ratios, uniform pore size, and ordered pore arrangement were synthesized using the above porous alumina membrane (PAM). Moreover, ...
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Various pore sizes of a porous alumina membrane were fabricated using H2SO4 and H2C2O4 electrolyte under different ionization voltages. Cu nanowire arrays with high aspect ratios, uniform pore size, and ordered pore arrangement were synthesized using the above porous alumina membrane (PAM). Moreover, Cu2O nanowire arrays were prepared through the oxidization of Cu metal nanowire arrays. From the microstructure and compositional analysis, it was observed that pores of different sizes, i.e. 20~30, 70~90 and 90~100 nm could be obtained by controlling various electrolytes and anodization voltage. The Cu nanowire synthesized with various pore sizes were found to be single crystal (20~90 nm) and polycrystalline (90~100nm) respectively. The single crystal Cu with (111) direction was occurred due to homogeneous current density distribution and relationship between current density (J) and nucleus radius (ro). After oxidation of Cu, the Cu2O nanowires with the pore sizes of 20~100 nm was found to be single crystal. The rearranged of Cu and O2 lattice sites promotes the enhancement of crystalline property.
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