Copper and nickel co-doping effects on the structural, optical and electrical properties of tungsten trioxide nanoparticles prepared by co-precipitation technique
Abstract:The pristine WO3 (tungsten trioxide) and Cu/Ni Co-doped WO3 nanoparticles were synthesized by the co-precipitation synthesis methods with fixed wt. % of nickel, i.e., 5 wt. %, and different wt. % of copper, i.e., 2, 3, 5 wt. %. The structural, optical and electrical properties, as well as the surface morphology were investigated thoroughly by various characterization techniques. All the doped/co-doped and un-doped samples had an orthorhombic structure, according to the XRD measurements. The XRD results furthe… Show more
“…The peaks at 873, 808, and 611 cm −1 shown in the FTIR spectrum can be attributed to the W-O inter -W stretching of bridging oxygen, W-O stretching mode, and W-O bonding mode [27,44]. On the other hand, no bands were observed that correspond to O-H, C–O, or C–H for precursors heated at 600°C, which indicated that starch was decomposed during this process [45,46]. …”
In the present study, WO3 nanoparticles (NPs) synthesised via starch-assisted co-precipitation approach and crystal violet (CV) dye was selected as a model pollutant to examine the photocatalytic efficiency of synthesised samples. The XRD of samples verified monoclinic phase with a crystallite size of 24 and 32 nm for starch-assisted WO3 (WS1) and without starch WO3 (WS0) NPs, respectively. SEM and FESEM analysed the morphology of synthesised samples and the average particle size of 108 nm is obtained for WS1. The bandgap value of WS1 has been calculated to be about 2.69 eV. According to obtained result, about 97% of CV dye degrades in the presence of WS1 under sunlight after 150 min with a rate constant of 0.01532 min−1.
“…The peaks at 873, 808, and 611 cm −1 shown in the FTIR spectrum can be attributed to the W-O inter -W stretching of bridging oxygen, W-O stretching mode, and W-O bonding mode [27,44]. On the other hand, no bands were observed that correspond to O-H, C–O, or C–H for precursors heated at 600°C, which indicated that starch was decomposed during this process [45,46]. …”
In the present study, WO3 nanoparticles (NPs) synthesised via starch-assisted co-precipitation approach and crystal violet (CV) dye was selected as a model pollutant to examine the photocatalytic efficiency of synthesised samples. The XRD of samples verified monoclinic phase with a crystallite size of 24 and 32 nm for starch-assisted WO3 (WS1) and without starch WO3 (WS0) NPs, respectively. SEM and FESEM analysed the morphology of synthesised samples and the average particle size of 108 nm is obtained for WS1. The bandgap value of WS1 has been calculated to be about 2.69 eV. According to obtained result, about 97% of CV dye degrades in the presence of WS1 under sunlight after 150 min with a rate constant of 0.01532 min−1.
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