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ABSTRACT: We have demonstrated a new and facile bottom-up protocol for the effective synthesis of oval-shaped iron oxide/ethylene glycol (FeOx /EG) mesostructured nanosheets. Deprotonated ethylene glycol molecules are intercalated into iron oxide layers to form an interlayer distance of 10.6 Å. These materials display some peculiar magnetic properties, such as the low Morin temperature TM and ferromagnetism below this TM value. CdSe/ZnS nanoparticles can be loaded onto these mesostructured nanosheets to produce nanocomposites that combine both magnetic and fluorescence functions. In addition, iron oxide/propanediol (or butanediol) mesostructured materials with increased interlayer distances can also be synthesized. The developed synthetic strategy may be extended toward the creation of other ultrathin mesostructured nanosheets.
Chemistry 02/2013; · 5.93 Impact Factor
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Xi Wang,
Meiyong Liao, Yeteng Zhong,
Jian Yao Zheng,
Wei Tian,
Tianyou Zhai,
Chunyi Zhi,
Ying Ma,
Jiannian Yao,
Yoshio Bando,
Dmitri Golberg
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ABSTRACT: Inspired by opening soft drink cans, a one-pot method to prepare ZnO hollow spheres with double-yolk egg (DEH) architectures is developed. The bubble-assisted Ostwald ripening is proposed for the formation of these novel structures. Uniqueness of DEHs morphology led to greatly enhanced photocatalytic activity and photodetector performance. The newly developed synthetic concept and the obtained novel morphologies should pave the way towards the design and fabrication of other similar materials with enhanced properties for microelectronics, optoelectronics, and other applications.
Advanced Materials 06/2012; 24(25):3421-5. · 13.88 Impact Factor
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ABSTRACT: In this work, ZnO hollow micro-/nano-structured microspheres were prepared via a one-pot solution route. The size and interior-cavity of these microspheres could be easily controlled by varying the precursor concentration. The hollow spherical assemblies were composed of short rod-like building units at low precursor concentration. When the precursor concentration increased, one-dimensional (1D) "pearl-chain-like" building units formed firstly and then self organized into hollow microspheres. The organization process and ripening of "pearl-chain-like" building units could be modulated by simply altering the reaction time. When tested in photocatalytic experiments, the hollow microspheres composed of loosely packed 1D "pearl-chain-like" building units showed higher activity than the densely packed ones. This method is very simple, mild, and may provide a new strategy to synthesize hierarchical self-assembled hollow structures.
Journal of Nanoscience and Nanotechnology 05/2012; 12(5):3990-6. · 1.56 Impact Factor
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ABSTRACT: Nowadays, despite the success evidenced in synthesis of hybrid materials, spherical hybrid materials are usually based on core-shell structures or alloy-like ensembles with homogenous distribution of all components. For core-shells, the performance of a core part is usually hampered due to a thick shell, and alloy-like ensembles commonly have low surface area. Therefore, the synthesis of hybrid multishelled hollow materials with both even phase distribution and well-ordered building blocks, may be a better choice. In this paper, we developed a new method to successfully fabricate Co 3 O 4 -Fe 3 O 4 materials with the above ideal structure. As-prepared Co 3 O 4 -Fe 3 O 4 products have definite structural advantages. Therefore, these Co 3 O 4 -Fe 3 O 4 products not only exhibit excellent ability in waste-water treatment applications, but are also feasible for the fast recyclable treatment via a simple magnetic separation. In addition, they also show interesting structure-dependent magnetic properties and could serve as a model material for a heterogeneous antiferromagnet/ferromagnet system without clear/sharp interfaces. Needless to say, our newly developed synthetic approach may be extended toward the synthesis of other hybrid materials with even functional phase distribution.
Journal of Materials Chemistry 01/2011; · 5.97 Impact Factor
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Journal of Materials Chemistry. 01/2011; 21(44):17998.
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Advanced Functional Materials 05/2010; 20(10):1680 - 1686. · 10.18 Impact Factor
