Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30443
Title: Photocatalytic degradation of Rhodamine B by TiO2/ZnO nanofibers under visible light irradiation
Authors: Pei, CC
Yang, L
Leung, WWF 
Hung, CH
Issue Date: 2011
Source: ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, 2011, v. 1, p. 569-571 How to cite?
Abstract: Photocatalytic reduction of contaminants in wastewater or polluted water can be enhanced by finding a suitable catalyst with property that utilizes an extended light adsorption spectrum, reducing the recombination of electron-hole pairs, and casting the catalyst into a form with large surface-to-volume ratio to be in contact with the contaminants. Based on these objectives, Zndoped TiO2 nanoparticles with high photocatalytic activity were synthesized by the sol-gel assisted nozzle-less electrospinning technique followed by calcining the precursor Ti(OiPr)4/ZnAc/PVP nanofibers in air in the temperature range of 450-650o. The thermal decomposition behavior was studied by thermogravimetric analyser and differential scanning calorimeter (TGA-DSC), and the morphology and crystal structure were monitored by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). With the different concentration of zinc acetate in the precursor solution, the diameter of fibers ranged from 80- 130 nm. The photocatalytic degradation of rhodamine B dye under visible light irradiation was also studied. It is found that the photosensitized degradation activity can be optimized by doping an appropriate amount of Zn (0.30 wt. %). Hence, the enhanced photodegradation of dyes with a new photocatalyst nanofiber under visible irradiation can be realized, which can take better use of solar energy.
Description: ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, Denver, CO, 11-17 November 2011
URI: http://hdl.handle.net/10397/30443
ISBN: 9780791854877
Appears in Collections:Conference Paper

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