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

• Published in: Crystals (Basel) Vol. 11; no. 12; p. 1467
• Main Authors: Alam, Mir Waqas, Aamir, Muhammad, Farhan, Mohd, Albuhulayqah, Maryam, Ahmad, Mohamad M., Ravikumar, C.R., Dileep Kumar, V.G., Ananda Murthy, H.C.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.12.2021
• Subjects: Absorption spectra; AR88 dye; Copper; Copper oxides; Energy gap; Environmental impact; Metal oxides; Morphology; Nanomaterials; Nickel oxides; Nitrates; Photocatalysis; Radiation; sensor; Sensors; solution combustion; Spectrum analysis; Synthesis; Transition metal oxides; Ultraviolet spectra; Wurtzite; X ray powder diffraction; X-ray diffraction; Zinc oxide; Zinc oxides; United States > US; Japan
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst11121467

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.