ZnO-based hollow microspheres with mesoporous shells: Polyoxometalate-assisted fabrication, growth mechanism and photocatalytic properties

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

OSTI ID:21580110

Qiuyu, Li ^[1]; Weilin, Chen; Mingliang, Ju; Lin, Liu ^[1]

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1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun, Jilin 130024 (China)

With the assistance of Keggin-type polyoxometalate, ZnO hollow microspheres with mesoporous shells were synthesized via a simple solvothermal approach without any templates and surfactants. The observations of morphology and structure performed by field emission scanning electronic microscopy and transmission electron microscopy indicated that the shells of the ZnO hollow spheres were built from nanosheets which were composed of nanoparticles. The transformation of structure and composition of samples were investigated by X-ray diffraction, X-ray photoelectron spectrometry and fourier transform infrared absorption spectroscopy. The formation mechanism of the hollow spheres is proposed based on time-dependent experimental results. The ZnO hollow microspheres exhibited a high photocatalytic activity for decolorization of Rhodamine B under ultraviolet irradiation. - Graphical Abstract: ZnO hollow spheres with mesporous shells were synthesized by an one-pot polyoxometalate-assisted solvothermal route. The ZnO hollow microspheres exhibited a high photocatalytic activity for decolorization of Rhodamine B (RhB) under UV irradiation. Highlights: > ZnO hollow microspheres were synthesized via a solvothermal route with polyoxometalate. > The polyoxometalate was vital for the formation of the hollow microspheres. > The ZnO hollow microspheres exhibited excellent photocatalytic activity of Rhodamine B.

• OSTI ID: 21580110
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 6; Other Information: DOI: 10.1016/j.jssc.2011.04.006; PII: S0022-4596(11)00174-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
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PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
FOURIER TRANSFORMATION
IRRADIATION
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NANOSTRUCTURES
PARTICLES
PHOTOCATALYSIS
SCANNING ELECTRON MICROSCOPY
SHELLS
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TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
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INTEGRAL TRANSFORMATIONS
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OXIDES
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