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Composite fiber BiVO 4 Preparation and visible light photocatalytic properties of dyeing wastewater

Author: LuWei
Tutor: YuDeShuang；YuJianQiang
School: Qingdao University
Course: Environmental Engineering
Keywords: Bismuth vanadate Visible-light Photocatalysis dye decomposition Fiber composite
CLC: X791
Type: Master's thesis
Year: 2011
Downloads: 39
Quote: 0
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Abstract


Bismuth Vanadate (BiVO4) is a novel visible-light responsive material and showed high photocatalytic activity, which has been received extensive attention, recently. In this dissertation, the photocatalytic property of BiVO4 for the decomposion of dyes in wastewater under visible-light irradiation was studied. In order to solve the problems of easy flowing away for powder catalyst, we loaded the photocatalyst onto carriers so that it can be applied into industry.In this thesis, visible-light responsive BiVO4@fiber material were prepared by means of urea coprecipitation, sol-gel, and aqueous ammonia precipitation precesses. The characterizations of the material were conducted on XRD、SEM and DRS, to investigate the crystal structure, surface topography, and physical properties of the BiVO4@fibers composite materials. The photocatalytic activity of BiVO4@fiber was evaluated by the degradations of industrial dye red FN-3G under visible-light. The results demonstrated that BiVO4 powder prepared by citrate acid complexation process at 573K showed better photocatalytic property than the other samples which possess monoclinic scheelite structure, though it has tetragonal scheelite sturcture. The BiVO4 particles can be effectively and firmly immobilized on the BiVO4@fiber composite material by means of urea coprecipitation. The BiVO4 particle load on the fiber displayed better surface topography, but the photocatalysis active got certain impact. Well it was found that BiVO4@,fiber material that prepared by aqueous ammonia precipitation showed the highest photocatalytic activity, which is a good method of composite fiber material and have huge potential of practical application.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Light industrial waste disposal and comprehensive utilization > Textile, printing and dyeing industry
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