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Facile solution synthesis of Cu2O-CuO-Cu(OH)2 hierarchical nanostructures for effective catalytic ozone decomposition

Abstract

Various Cu-based composites for catalytic ozone decomposition have been synthesized by reducing Cu2+ using reactant NH2OH•HCl in aqueous solution without addition of any extra etching agent. Cu2O-CuO heterogenous composite with many nanometer-size CuO nanoplates distributed on Cu2O surface as well as Cu(OH)2 nanowire was fabricated, and the structure evolution process was explored. The structure formation mechanism could be attributed to the synergistic reaction of the oxidation etching and acidic etching. It was found that the surface morphology and chemical composition of the nanostructures play important roles in catalyzing ozone decomposition. The Cu2O-CuO-Cu(OH)2 hierarchical nanostructure exhibits 100% ozone (20 ppm O3/air) decomposition efficiency at room temperature after 30 h of continuous operation, showing high stability. In addition, the hierarchical nanostructure also shows high moisture resistance, and the ozone conversion could be still above 80% at high relative humidity levels (ca. 90%) after 16 h test. The excellent performance can be contributed to the delocalized holes speculated by EPR signal, which may facilitate the necessary electron transfer between intermediate oxygen anions and the catalytic surface.

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Publication details

The article was received on 07 Feb 2018, accepted on 11 Apr 2018 and first published on 13 Apr 2018


Article type: Paper
DOI: 10.1039/C8CE00203G
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Facile solution synthesis of Cu2O-CuO-Cu(OH)2 hierarchical nanostructures for effective catalytic ozone decomposition

    S. Gong, X. Wu, J. Zhang, N. Han and Y. Chen, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00203G

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