Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Abstract

The preparation, characterization, and application of Nickel oxide (NiO)–Copper oxide (CuO)–Zinc oxide (ZnO) transition nanometal oxides have significantly enhanced their tunable properties for superior multifunctional performances compared with well-known metal oxides. NiO–CuO–ZnO nano transition metal oxides were synthesized by a simple eco-friendly solution combustion method. X-ray diffraction studies revealed distinct phases such as monoclinic, cubic, and hexagonal wurtzite for CuO, NiO, and ZnO, respectively, with NiO having the highest composition. The particle sizes were found to be in the range between 25 and 60 nm, as determined by powder X-ray diffraction. The energy bandgap values were found to be 1.63, 3.4, and 4.2 eV for CuO, ZnO, and NiO, respectively. All metal oxides exhibited a moderate degradation efficiency for AR88 dye. The results of ultraviolet–visible absorption spectra helped identify the bandgap of metal oxides and a suitable wavelength for photocatalytic irradiation. Finally, we concluded that the electrochemical studies revealed that the synthesized materials are well suitable for sensor applications.

Composite electrodes with superior catalytic activity in methanol electro-oxidation fabricated using ternary NiO–CuO–ZnO mixed metal oxides

“…9016105). 41,42 The ZnO diffraction peaks observed at 2 θ = 32°, 57°, 63°, 67° and 70° are indexed to hkl values (100), (110), (103), (200), and (201), respectively and are in good agreement with COD No. 9016105.…”

“…9016105. 34,42,43 In the case of NC, the peaks of face-centered cubic (fcc) NiO observed at 2 θ = 50°, 64°, 76° and 80° correspond to (200), (220), (311), and (222) planes, respectively. These values are in decent agreement with JCPDS no.…”

Novel Copper-Zinc-Manganese Ternary Metal Oxide Nanocomposite as Heterogeneous Catalyst for Glucose Sensor and Antibacterial Activity

“…Figure 11 b shows the CV results at different concentrations (1–5 mM) of the glucose analyte. A significant difference was observed between the cathodic and anodic peak intensities, which suggests the prepared materials have strong sensing applications [ 55 ]. By increasing the concentration of the analyte, a significant increase in the peak intensity was observed.…”

Photocatalytic Activity Induced by Metal Nanoparticles Synthesized by Sustainable Approaches: A Comprehensive Review

“…Synthesis of nickel oxide (NiO), CuO, and ZnO was carried out by the solution combustion method, making use of Centella asiatica extract as a fuel/reductant (Alam et al, 2021). ZnO exhibited a greater photocatalytic activity than NiO and CuO on acid red 88 (AR88).…”