Publication detail

Ultrasound and water flow driven piezophototronic effect in self-polarized flexible alpha-Fe2O3 containing PVDF nanofibers film for enhanced catalytic oxidation

ORUDZHEV, F. RAMAZANOV, S. SOBOLA, D. KASPAR, P. TRČKA, T. ČÁSTKOVÁ, K. KAŠTYL, J. ZVEREVA, I. WANG, C. SELIMOV, D. GULAKHMEDOV, R. ABDURAKHMANOV, M. SHUAIBOV, A. KADIEV, M.

Original Title

Ultrasound and water flow driven piezophototronic effect in self-polarized flexible alpha-Fe2O3 containing PVDF nanofibers film for enhanced catalytic oxidation

Type

journal article in Web of Science

Language

English

Original Abstract

A new piezophotocatalytically active membrane based on polyvinylidene fluoride (PVDF) nanofibers with alpha-Fe2O3 nanoparticles incorporated into them has been synthesized by electrospinning. The composition, morphology and structure of alpha-Fe2O3 containing PVDF nanofibers mats were investigated by SEM, XRD, Raman, FTIR, XPS and DSC. Studies have shown that the inclusion of alpha-Fe2O3 nanoparticles promotes additional crystallization and self-polarization of PVDF into an electroactive beta-phase. With the help of XPS, the mechanism of interfacial ion-dipole electrostatic interaction, leading to self-polishing and crystallization of the structure, is shown. Using measurements of VB XPS, UPS and the frequency dependence of the dielectric constant, the role of polarization effects on the formation of long-lived metastable energy states in the electronic structure of PVDF near the Fermi level is shown. Piezocatalytic and piezophotocatalytic activity was assessed by the decomposition of Methylene Blue (MB) under the influence of ultrasound and UV-Vis radiation. The efficiency of piezocatalysis and piezophotocatalysis was 60.4% and 99.5%, respectively. With the help of experiments on the capture of active redox forms, it was found that center dot OH radicals are the main component of the MB degradation. Two different mechanisms of generating center dot OH radicals for piezocatalysis and piezophotocatalysis have been reasonably proposed. The stability of the catalyst was shown after five successive cycles of piezophotocatalysis.

Keywords

Electrospinning nanofibers; Piezophototronic effect; Piezophotocatalysis; Polyvinylidene fluoride; PVDF; Fe2O3

Authors

ORUDZHEV, F.; RAMAZANOV, S.; SOBOLA, D.; KASPAR, P.; TRČKA, T.; ČÁSTKOVÁ, K.; KAŠTYL, J.; ZVEREVA, I.; WANG, C.; SELIMOV, D.; GULAKHMEDOV, R.; ABDURAKHMANOV, M.; SHUAIBOV, A.; KADIEV, M.

Released

1. 12. 2021

Publisher

ELSEVIER

Location

AMSTERDAM

ISBN

2211-2855

Periodical

Nano Energy

Year of study

90

Number

106586

State

United States of America

Pages from

1

Pages to

13

Pages count

13

URL

https://www.sciencedirect.com/science/article/pii/S2211285521008387?dgcid=rss_sd_all

BibTex

@article{BUT172847,
  author="Farid {Orudzhev} and Shikhgasan {Ramazanov} and Dinara {Sobola} and Pavel {Kaspar} and Tomáš {Trčka} and Klára {Částková} and Jaroslav {Kaštyl} and Irina {Zvereva} and Chuanyi {Wang} and Daud {Selimov} and Rashid {Gulakhmedov} and Magomed {Abdurakhmanov} and Abdulatip {Shuaibov} and Makhmud {Kadiev}",
  title="Ultrasound and water flow driven piezophototronic effect in self-polarized flexible alpha-Fe2O3 containing PVDF nanofibers film for enhanced catalytic oxidation",
  journal="Nano Energy",
  year="2021",
  volume="90",
  number="106586",
  pages="1--13",
  doi="10.1016/j.nanoen.2021.106586",
  issn="2211-2855",
  url="https://www.sciencedirect.com/science/article/pii/S2211285521008387?dgcid=rss_sd_all"
}