Nitrogen-doped TiO2 fibers for visible-light-induced photocatalytic activities

Mehmet D. Calisir, Melike Gungor, Ali Demir, Ali Kilic, Mohammad Mansoob Khan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

Nitrogen-doped TiO2 fibers (N–TiO2 Fs) were successfully and efficiently fabricated using titanium diisopropoxide bis(acetylacetonate) and polyvinylpyrrolidone (PVP) as a carrier polymer and nitrogen source via centrifugal spinning and subsequent calcination methods. XRD analysis confirmed that N–TiO2 Fs contains only anatase and rutile phases. XPS analysis revealed that N-atoms (from PVP) were successfully incorporated into the lattice of TiO2 whereas DTA and FTIR analysis confirmed that calcination at 550 °C for 1 h is appropriate to remove all organic impurities from the N–TiO2 Fs. SEM images showed that the N–TiO2 Fs of diameter (0.65 μm–1.2 μm) were produced and controlled with the amount of Ti-precursor. BET analysis confirmed that the addition of commercial TiO2 nanoparticles increased the specific surface area of the N–TiO2 Fs. UV–Vis diffuse reflectance measurements showed that N–TiO2 Fs exhibited a stronger light absorption in the visible region and a red-shift which is responsible for narrow band gap energy owing to the presence of N-atoms in the TiO2 lattice. This results in enhanced photocatalytic activity of the synthesized N–TiO2 Fs for degradation of methylene blue under visible light irradiation.

Original languageEnglish
Pages (from-to)16743-16753
Number of pages11
JournalCeramics International
Volume46
Issue number10
DOIs
Publication statusPublished - Jul 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd and Techna Group S.r.l.

Funding

The work was supported by Istanbul Technical University, Istanbul, Turkey ( BAP Grant MGA-2018-41209 ), Scientific and Technological Research Council of Turkey, Istanbul, Turkey (TUBITAK Grant no 214M371 ) and Areka Advanced LLC, Istanbul, Turkey.

FundersFunder number
Areka Advanced LLC
Istanbul Technical University, Istanbul, Turkey
British Association for PsychopharmacologyMGA-2018-41209
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu214M371

    Keywords

    • Nitrogen-doped TiO
    • Photocatalytic activities
    • TiO
    • TiO fibers
    • Visible-light photocatalysts

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