Abstract
Global environment issues have been extended with the growth of the population and become an essential difficult. The utilization of wastewater treatment method such as photocatalytic is excellent method for this scope. The photocatalytic response can be improved by the heterojunction metal oxide catalyst due to great separation of electrons and holes. Herein, the NiV2O6/CeO2 nanocomposites as p-n heterojunction was fabricated by using the simple combustion method. The structural properties of the prepared NiV2O6/CeO2 nanocomposites were characterized via X-ray diffraction, Raman, photoluminescence, transmission/scanning electron microscopic, and FTIR/UV–vis spectroscopy analysis. The XRD depicts the cubic and triclinic crystal phase of CeO2 and NiV2O6, respectively. The measured band gap energies of CeO2, NiV2O6, and NiV2O6/CeO2 nanocomposite are 3.22 eV, 2.60 eV, and 2.01 eV, respectively. The photo-degradation ability of CeO2, NiV2O6, and NiV2O6/CeO2 nanocomposite was studied for removal of crystal violet dye under visible light irradiation. The photocatalytic response of NiV2O6/CeO2 nanocomposite was 93.3% in 120 min, and higher than the single catalysts. Antibacterial assay of NiV2O6/CeO2 was performed against two G-positive and two G-negative bacteria. The results showed that the best antibacterial activity of NiV2O6/CeO2 versus four bacterial samples. The peroxidase activity of NiV2O6/CeO2 was investigated by detection of d-aspartic acid. Based on the finding, the detection limit of 2.10 μM, which that depicts the NiV2O6/CeO2 has excellent potential in detection analysis of d-aspartic acid.
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