Zhu, Shenmin and Zhang, Di and Chen, Zhixin and Zhou, Gang and Jiang, Haibo and Li, Jinlong (2010) Sonochemical fabrication of morpho-genetic TiO2 with hierarchical structures for photocatalyst. Journal of Nanoparticle Research, 12 (7). pp. 2445-2456.
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Titanium oxides (TiO2) with hierarchical structures have been successfully replicated from biotemplate using a sonochemical method. The bio-templates, cedarwoods, were irradiated under ultrasonic waves in TiCl4 solutions and then calcined at temperatures between 450 and 600 °C. The fine replications of the biotemplates in TiO2 down to nanometer’s level were verified using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The photocatalytic activities were assessed by measuring the percentage degradation of methylene blue using UV–vis spectroscopy. The calcination temperature has a strong effect on the structural replication and photocatalytic activity of the replicas. It appears that the calcination temperature of 450 °C results in the best structural replication with the highest surface area of 54.8 m2 g−1, and thus has the best photocatalytic properties. This method provides a simple, efficient, and versatile technique for fabricating TiO2 with hierarchical structures, and it has the potential to be applied to other systems for producing functional hierarchical materials for chemical sensor and nanodevice
|Uncontrolled Keywords:||Sonochemistry - Titania - Hierarchical structures - Photocatalyst - Porous nanomaterial - Nanomanufacturing|
|Subjects:||Material Science > Functional and hybrid materials|
Material Science > Nanofabrication processes and tools
|Deposited By:||Lesley Tobin|
|Deposited On:||30 Aug 2010 12:49|
|Last Modified:||30 Aug 2010 12:49|
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