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3. Preparation of porphyrinated polyacrylonitrile fiber mat supported TiO2 photocatalyst and its photocatalytic activities

Author

SHAO, Linjun, CHEN, Ji, HE, Luyao, XING, Guiying, and LV, Weixi

Subjects
Electrospinning,porphyrins,photodegradation,photolysis
Abstract

Fe(III)meso-tetraphenylporphyrinated polyacrylonitrile fiber mat supported TiO2 photocatalyst (PANC/ TiO2 mat) was prepared via copolymerization and electrospinning. SEM images showed that well-defined fibers with diameters around 1.47 \pm 0.26 m m were fabricated from Fe(III)meso-tetraphenylporphyrin (FeTPP)-acrylonitrile copolymer (PANC) and TiO2 mixture. The XRD characterizations demonstrated that the electrospinning process had no effect on the anatase structure of TiO2. The photocatalytic activity of the PANC/TiO2 mat was examined for the photodegradation of methyl red in aqueous solution under the irradiation of visible light. The results showed that this PANC/TiO2 fiber mat was very efficient for the photodegradation of methyl red, with a degradation percentage over 94%. It is worth noting that the PANC/TiO2 mat could be easily recovered and reused 3 times without any destruction of fiber morphologies.

Published
2014

7. Photodegradation of azo-dyes in aqueous solution by polyacrylonitrile nanofiber mat-supported metalloporphyrins.

Author

Shao, Linjun, Xing, Guiying, Lv, Weixi, Yu, Huijun, Qiu, Mingxi, Zhang, Xian ‐ Man, and Qi, Chenze

Subjects
ELECTROSPINNING, POLYACRYLONITRILES, NANOFIBERS, METALLOPORPHYRINS, AZO dyes, AQUEOUS solutions, TRANSITION metals, PHOTODEGRADATION
Abstract

Electrospinning has been employed to fabricate uniform polyacrylonitrile and polyacrylonitrile copolymer nanofiber mats supporting metalloporphyrins (MTPP; M: Zn(II), Cu(II), Ni(II), Co(II), Fe(III) and Pd(II); TPP: meso-tetraphenylporphyrin). The nanofiber mat-supported metalloporphyrins are shown as efficient photocatalysts for the degradation of various azo-dyes in aqueous solutions under visible light irradiation. The effect of transition metals on azo-dye photodegradation has been examined. The nanofiber mat-supported copper-porphyrin and iron-porphyrin complexes are among the most effective photocatalysts for azo-dye degradation. Immobilization of the metalloporphyrins onto the nanofiber mats greatly facilitates the recovery and reuse of the expensive and toxic photocatalysts. Most interestingly, there are no significant degradations of the photocatalytic activities of the recycled photocatalysts. © 2012 Society of Chemical Industry [ABSTRACT FROM AUTHOR]

Published
2013
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