Self-Assembled Hollow Spheres of β-Ni(OH) 2 and Their Derived Nanomaterials

Handle URI:
http://hdl.handle.net/10754/599575
Title:
Self-Assembled Hollow Spheres of β-Ni(OH) 2 and Their Derived Nanomaterials
Authors:
Zhang, Shengmao; Zeng, Hua Chun
Abstract:
This paper describes a novel solution-based chemical process to architect hollow spheres of β-Ni(OH) 2 with controllable sizes in submicrometer and micrometer regimes. In the synthesis, starting nickel salt (nitrate) is first converted to 6-coordinated nickel ion complex [Ni(EDA) 3] 2+ (bidentate ligand EDA = C 2H 4(NH 2) 2) to avoid rapid solid formation. Hollow and core - shell β-Ni(OH) 2 spheres can be obtained with this template-free approach under one-pot conditions. The β-Ni(OH) 2 spheres are constructed from petal-like nanobuilding units which in turn are formed from even smaller nanocrystallites. The obtained porous β-Ni(OH) 2 spheres have a large specific surface area and show a unimodal pore-size distribution. Several preparative parameters have been examined and optimized. In particular, the concentration of divalent nickel in the starting solutions plays an important role in controlling thickness of the petal-like β-Ni(OH) 2 flakes and diameter of spheres. The β-Ni(OH) 2 flakes self-assemble into final spherical products through a donut-like structural intermediate. Furthermore, the β-Ni(OH) 2 hollow spheres can be used as solid precursors to synthesize other nanostructured derivatives. In this work, phase pure inorganic nanostructures, carbon nanotube (CNT) - inorganic nanocomposites, and inorganic - inorganic nanocom-posites (e.g., NiO, Ni, NiO/Ni, Ni/β-Ni(OH) 2, CNTs/NiO, CNTs/Ni, Ni@CNTs, Fe(OH) 3/β-Ni(OH) 2, Co(OH) 2/β-Ni(OH) 2, and Mg(OH) 2/β-Ni(OH) 2) have been prepared via solid-state thermal decomposition, gas-phase reduction, solution-based reduction, surface oxidation, chemical vapor deposition, and liquid-phase deposition. A greater picture for general synthesis of Ni-containing nanomaterials is thus obtained. © 2009 American Chemical Society.
Citation:
Zhang S, Zeng HC (2009) Self-Assembled Hollow Spheres of β-Ni(OH) 2 and Their Derived Nanomaterials . Chem Mater 21: 871–883. Available: http://dx.doi.org/10.1021/cm8028593.
Publisher:
American Chemical Society (ACS)
Journal:
Chemistry of Materials
Issue Date:
10-Mar-2009
DOI:
10.1021/cm8028593
Type:
Article
ISSN:
0897-4756; 1520-5002
Sponsors:
The authors gratefully acknowledge the financial support provided by the National University of Singapore, Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia. S.M.Z. would also like to thank the China Scholarship Council (CSC) for providing his visiting scholarship at the National University of Singapore.
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Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Shengmaoen
dc.contributor.authorZeng, Hua Chunen
dc.date.accessioned2016-02-28T05:53:38Zen
dc.date.available2016-02-28T05:53:38Zen
dc.date.issued2009-03-10en
dc.identifier.citationZhang S, Zeng HC (2009) Self-Assembled Hollow Spheres of β-Ni(OH) 2 and Their Derived Nanomaterials . Chem Mater 21: 871–883. Available: http://dx.doi.org/10.1021/cm8028593.en
dc.identifier.issn0897-4756en
dc.identifier.issn1520-5002en
dc.identifier.doi10.1021/cm8028593en
dc.identifier.urihttp://hdl.handle.net/10754/599575en
dc.description.abstractThis paper describes a novel solution-based chemical process to architect hollow spheres of β-Ni(OH) 2 with controllable sizes in submicrometer and micrometer regimes. In the synthesis, starting nickel salt (nitrate) is first converted to 6-coordinated nickel ion complex [Ni(EDA) 3] 2+ (bidentate ligand EDA = C 2H 4(NH 2) 2) to avoid rapid solid formation. Hollow and core - shell β-Ni(OH) 2 spheres can be obtained with this template-free approach under one-pot conditions. The β-Ni(OH) 2 spheres are constructed from petal-like nanobuilding units which in turn are formed from even smaller nanocrystallites. The obtained porous β-Ni(OH) 2 spheres have a large specific surface area and show a unimodal pore-size distribution. Several preparative parameters have been examined and optimized. In particular, the concentration of divalent nickel in the starting solutions plays an important role in controlling thickness of the petal-like β-Ni(OH) 2 flakes and diameter of spheres. The β-Ni(OH) 2 flakes self-assemble into final spherical products through a donut-like structural intermediate. Furthermore, the β-Ni(OH) 2 hollow spheres can be used as solid precursors to synthesize other nanostructured derivatives. In this work, phase pure inorganic nanostructures, carbon nanotube (CNT) - inorganic nanocomposites, and inorganic - inorganic nanocom-posites (e.g., NiO, Ni, NiO/Ni, Ni/β-Ni(OH) 2, CNTs/NiO, CNTs/Ni, Ni@CNTs, Fe(OH) 3/β-Ni(OH) 2, Co(OH) 2/β-Ni(OH) 2, and Mg(OH) 2/β-Ni(OH) 2) have been prepared via solid-state thermal decomposition, gas-phase reduction, solution-based reduction, surface oxidation, chemical vapor deposition, and liquid-phase deposition. A greater picture for general synthesis of Ni-containing nanomaterials is thus obtained. © 2009 American Chemical Society.en
dc.description.sponsorshipThe authors gratefully acknowledge the financial support provided by the National University of Singapore, Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia. S.M.Z. would also like to thank the China Scholarship Council (CSC) for providing his visiting scholarship at the National University of Singapore.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleSelf-Assembled Hollow Spheres of β-Ni(OH) 2 and Their Derived Nanomaterialsen
dc.typeArticleen
dc.identifier.journalChemistry of Materialsen
dc.contributor.institutionNational University of Singapore, Singapore City, Singaporeen
dc.contributor.institutionHenan University, Kaifeng, Chinaen
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