Visible Light Photocatalytic Degradation PVC/B-F Co-Doped TiO₂ Composite

Abstract:

The B-F codoped nano-TiO₂ powders were prepared by the sol-gel method. The surface of powders was modified by stearic acid. The visible light photodegradable PVC/B-F codoped nano-TiO₂ composite films were prepared by tape casting processing. Solid-phase visible light photocatalytic degradation of the films were investigated with a 1000W xenon lamp and a ZJB 420 filter glass was used to cut off light of wavelength <420 nm. The weight-loss measurement, SEM, DSC of films were detected. Results showed that the weight loss of PVC/B-F codoped nano-TiO₂ composite film (2%TiO₂ w/w) is 16.9% after 120h UV irradiation, which is notably higher than that of both the pure PVC film and the PVC/nano-TiO₂ composite film. Glass transition (Tg) is appeared for samples after 72h irradiation, and the Tg of PVC/B-F codoped nano-TiO₂ composite film is the lowest of all samples. The surface of PVC/B-F codoped nano-TiO₂ composite film was destroyed obviously by SEM photo.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 2015-2018
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.2015
• Online since: May 2011
• Authors: Zhong Hou Zhang, Guang Xiu Cao, Ying Ying Li, Xiao Yan Wei
• Keywords: B-F Co-Doped, Nano-TiO₂, Photo-Catalytic Degradation, PVC, Visible Light

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