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- W2322704959 abstract "We developed a novel photochemical technique for preparation of ceria (CeO2) nanocrystals in simple aqueous solution containing only Ce(NO3)3, where no additive and no heating are required. Under UV light illumination, photochemical reduction of NO3− resulted in formation of NO2− accompanied by hydroxyl radicals (·OH) as intermediate species. The hydroxyl radicals could oxidize Ce3+ to tetravalent state (Ce(OH)22+), then CeO2 nuclei were formed through deprotonation. The aqueous CeO2 sol was prepared via dialysis of the reacted solution against deionized water to remove the excess electrolyte. Since the photooxidation process homogeneously occurs over the entire solution due to high optical transmittance of the solvent, the particle size distribution becomes relatively narrow and the mean diameter can be easily controlled by adjusting the initial concentration of Ce(NO3)3. The prepared CeO2 nanoparticles were potent against oxidative polymerization of phenolic derivatives (guaiacol) at room temperature. This paper clarifies the photochemical formation mechanism of CeO2 nanocrystals in the Ce(NO3)3 solution, and the advantages of the proposed method are discussed in detail." @default.
- W2322704959 created "2016-06-24" @default.
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- W2322704959 date "2011-03-18" @default.
- W2322704959 modified "2023-09-23" @default.
- W2322704959 title "Photochemical Synthesis of Monodispersed Ceria Nanocrystals in Simple Cerium Nitrate Solution without Additives" @default.
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- W2322704959 doi "https://doi.org/10.1021/cg1014048" @default.
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