Synthesis of nanophased metal oxides in supercritical water: Catalysts for biomass conversion

Caroline Levy; Masaru Watanabe; Yuichi Aizawa; Hiroshi Inomata; Kiwamu Sue

doi:10.1111/j.1744-7402.2006.02100.x

Synthesis of nanophased metal oxides in supercritical water: Catalysts for biomass conversion

Caroline Levy, Masaru Watanabe, Yuichi Aizawa, Hiroshi Inomata, Kiwamu Sue

ENG - Research Center of Supercritical Fluid Terchnolody

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Nanoparticles of zinc oxide-based materials (ZnO, ZnAl₂ O₄) with various morphologies were synthesized in supercritical water (SCW) with a flow-type apparatus and in sub- and supercritical water with a batch reactor. In the flow-type apparatus, smaller particles were obtained. Depending on the precursors, the morphology of crystallites is rod, hexagonal, or rectangular shaped. ZnAl₂O₄ was synthesized with a high specific surface area (S_BET) reaching 210m²/g and nanocrystallite sizes ≤10 nm. The KOH concentration played a major role in the formation of ZnO and ZnAl₂O₄ phases. Then, the synthesized materials were used as catalysts for the biomass conversion by the oxidation process to produce hydrogen.

Original language	English
Pages (from-to)	337-344
Number of pages	8
Journal	International Journal of Applied Ceramic Technology
Volume	3
Issue number	5
DOIs	https://doi.org/10.1111/j.1744-7402.2006.02100.x
Publication status	Published - 2006 Oct 1

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Marketing
Materials Chemistry

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abstract = "Nanoparticles of zinc oxide-based materials (ZnO, ZnAl2 O4) with various morphologies were synthesized in supercritical water (SCW) with a flow-type apparatus and in sub- and supercritical water with a batch reactor. In the flow-type apparatus, smaller particles were obtained. Depending on the precursors, the morphology of crystallites is rod, hexagonal, or rectangular shaped. ZnAl2O4 was synthesized with a high specific surface area (SBET) reaching 210m2/g and nanocrystallite sizes ≤10 nm. The KOH concentration played a major role in the formation of ZnO and ZnAl2O4 phases. Then, the synthesized materials were used as catalysts for the biomass conversion by the oxidation process to produce hydrogen.",

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AU - Sue, Kiwamu

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