Preparation of Spinous ZrO2 Microspheres with Tunable Shell and Chamber Structure by Controlling Pollen as a Nanoparticles Reactor

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Abstract:

Spinous hollow and core–shell microspheres constructed from ZrO2 nanoparticles and keeping the complex morphology of pollens were prepared by bio-template route. Compared with other bio-templates synthesis, the superiority of our synthesis is that the growth of nanoparticles can be controlled in particular space of template. The theory of pollen as a reactor and a possible formation mechanism were proposed which could explain the tunable structure: under a mild condition, the pollen wall will be controlled as a nanoparticles bio-reactor to form the hollow structure; when under a strenuous condition, pollen wall and pollen interior will act as a whole bio-reactor, and the core–shell structure could be obtained. At the same time, the shell thickness can be controlled through etching pollen wall by different concentrations HCl. These microspheres can be used as photocatalyst due to their unique structure. This work provides a novel pathway to the synthesis of hollow nanostructure spheres with complicated structure and morphology.

Keywords: BIO-REACTOR; CORE-SHELL MICROSPHERES; HOLLOW MICROSPHERES; PHOTOCATALYST; ZRO2 NANOPARTICLES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5020

Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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