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Mono-dispersed CeO2 hollow nanospheres with the size in the 50–200nm range were fabricated at room temperature by a facile etching approach based on the redox reaction between CeO2 solid nanospheres of certain size (as self-template) and FeSO4 (as etching agent). The internal diameter of the CeO2 hollow nanostructure gradually increases with extending reaction time. The obtained CeO2 materials are...
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