Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control

Abstract Composite hollow nanostructure composed by transition metal oxides are promising materials in electrochemistry, catalyst chemistry and material science. In this contribution, necklace-like NiO-CuO heterogeneous composite hollow nanostructures were synthesized by annealing Ni/Cu superlattice...

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Autores principales:	Shao Hui Xu, Guang Tao Fei, Hao Miao Ouyang, Guo Liang Shang, Xu Dong Gao, Li De Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0c8f31a68ade4cfdb0ab1376fd5d2128
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spelling	oai:doaj.org-article:0c8f31a68ade4cfdb0ab1376fd5d21282021-12-02T11:52:31ZNecklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control10.1038/s41598-017-00157-02045-2322https://doaj.org/article/0c8f31a68ade4cfdb0ab1376fd5d21282017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00157-0https://doaj.org/toc/2045-2322Abstract Composite hollow nanostructure composed by transition metal oxides are promising materials in electrochemistry, catalyst chemistry and material science. In this contribution, necklace-like NiO-CuO heterogeneous composite hollow nanostructures were synthesized by annealing Ni/Cu superlattice nanowires in air. Two kinds of morphologies including CuO nanotube linked core-shell structures and CuO nanotube linked hollow structures were obtained. The structure can be tuned easily by adjusting the relative length of Cu segments in Ni/Cu superlattice nanowires and the annealing temperature. The relative diffusion amount of Cu to Ni segments was proved to be the key factor to influence the annealed sample morphology. The formation mechanism was discussed in detail based on Kirkendal effect and high temperature oxidation of alloy. We demonstrated that hollow structure or core-shell structure is related to whether the oxidation exists only in external sites or co-exists in external and internal sites during annealing.Shao Hui XuGuang Tao FeiHao Miao OuyangGuo Liang ShangXu Dong GaoLi De ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shao Hui Xu Guang Tao Fei Hao Miao Ouyang Guo Liang Shang Xu Dong Gao Li De Zhang Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
description	Abstract Composite hollow nanostructure composed by transition metal oxides are promising materials in electrochemistry, catalyst chemistry and material science. In this contribution, necklace-like NiO-CuO heterogeneous composite hollow nanostructures were synthesized by annealing Ni/Cu superlattice nanowires in air. Two kinds of morphologies including CuO nanotube linked core-shell structures and CuO nanotube linked hollow structures were obtained. The structure can be tuned easily by adjusting the relative length of Cu segments in Ni/Cu superlattice nanowires and the annealing temperature. The relative diffusion amount of Cu to Ni segments was proved to be the key factor to influence the annealed sample morphology. The formation mechanism was discussed in detail based on Kirkendal effect and high temperature oxidation of alloy. We demonstrated that hollow structure or core-shell structure is related to whether the oxidation exists only in external sites or co-exists in external and internal sites during annealing.
format	article
author	Shao Hui Xu Guang Tao Fei Hao Miao Ouyang Guo Liang Shang Xu Dong Gao Li De Zhang
author_facet	Shao Hui Xu Guang Tao Fei Hao Miao Ouyang Guo Liang Shang Xu Dong Gao Li De Zhang
author_sort	Shao Hui Xu
title	Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
title_short	Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
title_full	Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
title_fullStr	Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
title_full_unstemmed	Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control
title_sort	necklace-like nio-cuo heterogeneous composite hollow nanostructure: preparation, formation mechanism and structure control
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0c8f31a68ade4cfdb0ab1376fd5d2128
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Necklace-like NiO-CuO Heterogeneous Composite Hollow Nanostructure: Preparation, Formation Mechanism and Structure Control

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