Reusability of PVA/TiO2 Hybrid Films during Long-term Use in Photocatalytic Process
XIE Shan
RUAN Yaqi
FANG Qihui
OUYANG Ke
Abstract：This paper presented the preparation of PVA/TiO2 hybrid films of high photocatalytic activity by the freezing and thawing process.In addition,long-term tests were conducted which indicated that the number of freezing-thawing cycles notably affected photocatalytic activity,the durability of PVA/TiO2 hybrid films and the embedding efficiency of TiO2;the PVA/TiO2 hybrid films when being prepared with five freezing-thawing cycles,compared with one or three freezing-thawing cycles,had higher photocatalytic activity,fewer embedded TiO2 loss,as well as lower weight and thickness changes during the long-time photocatalysis process.The immobilization effect of nano-TiO2 in PVA matrix and the relationship among freezing-thawing cycles,photocatalytic activity and recyclability of the hybrid films were also illustrated and discussed with the analytic data of SEM,FI-IR and TGA.
Keywords：PVA/TiO2 hybrid filmslong-term testsphotocatalytic degradationreusability of films
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 103-108 )