Different heat treatment of CeO2 nanoparticle composited with ZnO to enhance photocatalytic performance

International Symposium on Current Progress in Functional Materials

Taufik, A.^1,2 ; Shabrany, H.^1,2 ; Saleh, R.^1,2

Department of Physics, Faculty of Mathematics, Natural Sciences Universitas Indonesia, Kampus UI Depok, Depok

16424, Indonesia^1

Integrated Laboratory of Energy and Environment, Faculty of Mathematics, Natural Sciences Universitas Indonesia, Kampus UI Depok, Depok

16424, Indonesia^2

关键词: Characterization techniques;    Diffuse reflectance spectroscopy;    Methylene Blue;    Photo-catalytic;    Photocatalytic activities;    Photocatalytic performance;    Structural and optical properties;    Structural characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012038/pdf
DOI  :  10.1088/1757-899X/188/1/012038

来源: IOP

【 摘 要 】

In this study, ZnO/CeO2nanocomposites were prepared with four variations of the molar ratio of ZnO to CeO2nanoparticles. Both ZnO and CeO2nanoparticles were synthesized using the sol-gel method at low temperature, followed by different heat treatments for CeO2nanoparticles. Thermal phase transformation studies of the CeO2nanoparticles were observed at annealing temperatures of 400-800°C. The complete crystalline structure of CeO2nanoparticles was obtained at an annealing temperature of 800°C. The structural and optical properties of all samples were observed using several characterization techniques, such as X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy, and Brunauer, Emmett, and Teller (BET) surface area analysis. The structural characterization results revealed that the prepared CeO2nanoparticles were quite crystalline, with a cubic structure. The photocatalytic activities of all samples were tested under visible irradiation. The obtained results showed that ZnO/CeO2nanocomposites with a molar ratio 1:0.3 exhibited the highest photocatalytic activity. Further understanding of the role of primary active species underlying the reaction mechanism involved in photocatalytic activity were carried out in controlled experiments by adding several scavengers. The detailed mechanism and its correlation with the properties of ZnO/CeO2nanocomposites were discuss.