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Title: Synthesis of Co3O4 spinel at ambient conditions
Authors: Zeng, H.C. 
Lim, Y.Y.
Issue Date: Jun-2000
Source: Zeng, H.C.,Lim, Y.Y. (2000-06). Synthesis of Co3O4 spinel at ambient conditions. Journal of Materials Research 15 (6) : 1250-1253. ScholarBank@NUS Repository.
Abstract: Co3O4 was prepared in aqueous solutions through a staged oxidation process. When the mole ratio of starting chemicals Co2+:OH- is ≤1:2 (Co2+ as a limiting reagent), the formation reaction follows the brucitelike phase to cobalt oxide-hydroxide, and then to cubic spinel. However, when the ratio of Co2+:OH- is >1:2 (OH- as a limiting reagent), the reaction path changes to the brucite-like to hydrotalcite-like phase, and then to the spinel. Using the present method, Co3O4 can be formed at a temperature as low as 40 °C, and single-phase spinel Co3O4 can be prepared at 50 °C within hours under normal atmospheric pressure.
Source Title: Journal of Materials Research
ISSN: 08842914
Appears in Collections:Staff Publications

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