Crystallographic defects induced F-Center and optical enhancements in CeO2-TiO2 nanocomposites

Q1 Social Sciences

South African Journal of Chemical Engineering Pub Date : 2025-01-19 DOI:10.1016/j.sajce.2025.01.010

Samor Boonphan , Suriyong Prachakiew , Chaiyuth Nontakoat , Yanee Keereeta , Chatdanai Boonruang , Arrak Klinbumrung

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引用次数: 0

Abstract

This study reports the synthesis and characterization of CeO₂-TiO₂ nanocomposites, focusing on the crystallography and defects in enhancing optical properties. Nanocomposites with varying concentrations of CeO₂ (0–5 mol %) were synthesized using a facile ultrasonic and thermal method. The sample was characterized using several techniques, including XRD, FT-IR, SEM, EDS, UV–Vis spectroscopy, and PL. The crystallite, strain, and dislocation density were estimated based on the XRD analysis. FT-IR spectra refer to CO₂ adsorption in the composites. The Dynamic Light Scattering (DLS) exhibits a smaller diameter with more CeO₂ content. The incorporation of 5 mol % CeO₂ led to a significant reduction in the bandgap from 3.00 eV to 2.24 eV, enabling enhanced absorption in the visible light range. As observed through photoluminescence analysis, F-center defects improved optical density, making the material potential in visible-light-driven photonic technologies. The results suggest that CeO₂-TiO₂ nanocomposites with abundant F-center defects offer novel opportunities in optical devices and coloration improvement.

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来源期刊

South African Journal of Chemical Engineering Social Sciences-Education

CiteScore

8.40

自引率

0.00%

发文量

100

审稿时长

33 weeks

期刊介绍： The journal has a particular interest in publishing papers on the unique issues facing chemical engineering taking place in countries that are rich in resources but face specific technical and societal challenges, which require detailed knowledge of local conditions to address. Core topic areas are: Environmental process engineering • treatment and handling of waste and pollutants • the abatement of pollution, environmental process control • cleaner technologies • waste minimization • environmental chemical engineering • water treatment Reaction Engineering • modelling and simulation of reactors • transport phenomena within reacting systems • fluidization technology • reactor design Separation technologies • classic separations • novel separations Process and materials synthesis • novel synthesis of materials or processes, including but not limited to nanotechnology, ceramics, etc. Metallurgical process engineering and coal technology • novel developments related to the minerals beneficiation industry • coal technology Chemical engineering education • guides to good practice • novel approaches to learning • education beyond university.