Characterization of wet processed (Ni, Zn)-ferrites for Co2 decomposition

Jung Sik Kim, Jung Ryul Ahn

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Ultrafine (Ni, Zn)-ferrites were prepared by two different methods of coprecipitation and hydrothermal synthesis, and their oxygen-deficient ferrites (ODF) produced by hydrogen reduction were investigated on the efficiency of CO2 decomposition. The crystalline sizes of (Ni, Zn)-ferrites were less than 30 nm with high Brunauer-Emmett-Teller (BET) surface areas, ranging from 77 to 172 m2 g-1. The (Ni, Zn)-ferrites by hydrothermal synthesis resulted in smaller crystalline sizes, higher BET surface areas and better efficiencies of CO2 decomposition than by coprecipitation. Compared with the binary NiFe2O4-δ ferrite, the ternary (Nix, Zn1-x) Fe2O4-δ ferrites showed higher efficiency for CO2 decomposition, indicating a potential catalyst for the reduction of CO2 emission in the environmental atmosphere.

Original languageEnglish
Pages (from-to)4813-4816
Number of pages4
JournalJournal of Materials Science
Issue number19
StatePublished - 1 Oct 2001


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