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Novel cone-like ZnO mesocrystal by coexposed (101 @#x0305;1) and (0001 @#x0305;) facets with enhanced photocatalytic activity

Abstract

An unusual designated-tailoring on preferential growth of ZnO meso-/nanocrystals with different shapes and sizes was successfully achieved through a very facile precursor-hydrolysis process in a water/organic solvent system. The shape-evolution of ZnO from mesocrystal to nanocrystal was occurred by only increasing the amount of water in the reaction system under otherwise the same conditions, which can be attributed to the selective-capping and preferential growth mechanism based on the DFT calculations. Typically, the nanoparticle-aggregated cone-like ZnO mesocrystals enclosed by curved (101 @#x0305;1) and flat (0001 @#x0305;) surfaces were prepared in a lower amount of water, while various ZnO without curved (101 @#x0305;1) surfaces were synthesized in a higher amount of water. Especially, the “surface heterojunction” was constructed in the cone-like ZnO meoscrystals with coexposed curved (101 @#x0305;1) and flat (0001 @#x0305;) surfaces, which displayed a higher photocatalytic degradation of methyl orange dye than that of the ZnO nanocrystals. This investigation is of great significance in the synthesis of additive-free ZnO mesocrystals, and offers a good opportunity to understand the formation mechanism and fundamental significance of the preferential growth of ZnO mesocrystals. Importantly, it is believed that this water-induced synthetic strategy reported here would provide a promising way to design more and more metal oxide architectures with controllable morphologies.

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Publication details

The article was received on 24 May 2018, accepted on 07 Jul 2018 and first published on 10 Jul 2018


Article type: Research Article
DOI: 10.1039/C8QI00481A
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Novel cone-like ZnO mesocrystal by coexposed (101 @#x0305;1) and (0001 @#x0305;) facets with enhanced photocatalytic activity

    S. Liang, X. Gou, J. Cui, Y. Luo, H. Qu, T. Zhang, Z. Yang, Q. Yang and S. Sun, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00481A

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