Influence of Ni Doping on Oxygen Vacancy-Induced Changes in Structural and Chemical Properties of CeO2 Nanorods

In recent years, cerium dioxide (CeO2) has attracted considerable attention owing to its remarkable performance in various applications, including photocatalysis, fuel cells, and catalysis. This study explores the effect of nickel (Ni) doping on the structural, thermal, and chemical properties of Ce...

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Bibliographic Details
Published inCrystals (Basel) Vol. 14; no. 8; p. 746
Main Authors Zhu, Yuanzheng, Wang, Weixia, Chen, Gejunxiang, Li, Huyi, Zhang, Yuedie, Liu, Chang, Wang, Hao, Cheng, Ping, Chen, Chunguang, Gimyeong Seong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2024
Subjects
Catalysis
cerium dioxide
Cerium oxides
Chemical properties
Crystal lattices
Crystal structure
Degradation
Doping
Dyes
Electrons
Fuel cells
hydrothermal synthesis
Lattice vacancies
Metals
Methylene blue
Morphology
Nanorods
Ni doping
Nickel
Nitrates
Oxygen
oxygen vacancies
Raman spectroscopy
Spectrum analysis
Thermal analysis
Thermogravimetric analysis
Ultrasonic imaging
Water
X ray powder diffraction
X-rays
Beijing China
China
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Summary:In recent years, cerium dioxide (CeO2) has attracted considerable attention owing to its remarkable performance in various applications, including photocatalysis, fuel cells, and catalysis. This study explores the effect of nickel (Ni) doping on the structural, thermal, and chemical properties of CeO2 nanorods, particularly focusing on oxygen vacancy-related phenomena. Utilizing X-ray powder diffraction (XRD), alterations in crystal structure and peak shifts were observed, indicating successful Ni doping and the formation of Ni2O3 at higher doping levels, likely due to non-equilibrium reactions. Thermal gravimetric analysis (TGA) revealed changes in oxygen release mechanisms, with increasing Ni doping resulting in the release of lattice oxygen at lower temperatures. Raman spectroscopy corroborated these findings by identifying characteristic peaks associated with oxygen vacancies, facilitating the assessment of Ni doping levels. Ni-doped CeO2 can catalyze the ultrasonic degradation of methylene blue, which has good application prospects for catalytic ultrasonic degradation of organic pollutants. Overall, this study underscores the substantial impact of Ni doping on CeO2 nanorods, shedding light on tailored catalytic applications through the modulation of oxygen vacancies while preserving the nanorod morphology.
ISSN:2073-4352
DOI:10.3390/cryst14080746