Photo-triggered antibacterial and catalytic activities of solution combustion synthesized CeO2/NiO binary nanocomposite
Document Type
Article
Publication Date
7-1-2023
Abstract
CeO2-based nanocomposites are the promising photocatalytic materials for various applications. In this study, CeO2/NiO nanocomposite was synthesized from pristine CeO2 and NiO nanoparticles by a solution combustion method using urea as fuel. The structural, optical, and morphological details of the nanomaterials are analyzed using various characterization techniques. The X-ray diffraction (XRD) pattern of CeO2 and NiO corresponds to a single-phase cubic structure with Fm3 ?m space group. The XRD peaks and SAED ring patterns of CeO2, NiO, and the CeO2/NiO nanocomposite matched the standard diffraction patterns accurately. The metal-oxygen bonds are identified using IR and Raman analyses. The enhanced surface resonance peak at 367 nm confirms the formation of the CeO2/NiO nanocomposite. The band gap of the CeO2/NiO nanocomposite narrowed to 1.85 eV contributed to enhance photoabsorption. The various peaks in the photoluminescence spectrum indicated the emission behavior of the nanomaterials. FESEM and HRTEM micrographs validated the perfect integration of pristine nanoparticles into the nanocomposite material. Antibacterial assays are performed against Gram-positive and Gram-negative bacteria, which showed good antibacterial activity. The photocatalytic activity of the CeO2/NiO nanocomposite for Methylene Blue (MB) dye degradation was investigated, and the data fit well with the pseudo-first-order reaction. Combustion-synthesized CeO2/NiO nanocomposites offer an efficient and straightforward approach for antibacterial and dye-degradation applications.
Keywords
CeO2, NiO nanocomposite, Solution combustion synthesis, Dye degradation, Photocatalytic activity
Divisions
nanotechnology
Funders
JAC Funded Research Project (JACFRP), Jayaraj Annapackiam College for Women, Periyakulam, Tamil Nadu, India
Publication Title
Inorganic Chemistry Communications
Volume
153
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS