High photocatalytic activity of immobilized TiO2 nanorods on carbonized cotton fibers

Bin Wang, Rengasamy Karthikeyan, Xiao Ying Lu, Jin Xuan, Michael K H Leung

Research output: Contribution to journalArticle

Abstract

In this study, TiO2 nanorods were successfully immobilized on carbon fibers by a facile pyrolysis of natural cotton in nitrogen atmosphere followed by a one-pot hydrothermal method. Carbonized cotton fibers (CCFs) and TiO2-CCFs composites were characterized using field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffractometer (XRD), diffuse reflectance UV-vis spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Results implied that the band gap narrowing of TiO2 was achieved after integration of CCFs. Dye adsorption isotherm indicated that the maximum dye adsorption capacity (qm) of CCFs-1000 (13.4mg/g) was 2 times higher than that of cotton fibers and qm of TiO2-CCFs-1000 (9.0mg/g) was 6-7 times higher than that of TiO2 nanorods. Photocatalytic activity of TiO2 nanorods prepared with 3mL Ti(OBu)4 showed the highest photocatalytic activity. TiO2-CCFs-1000 exhibited higher activity than TiO2 immobilized on CCFs-400, CCFs-600 and CCFs-800. Good photostability of TiO2-CCFs-1000 was found for dye degradation under visible light irradiation. The enhancement of photocatalytic dye degradation was due to the high adsorptivity of dye molecules, enhanced light adsorption and effective separation of electron-hole pairs. This work provides a low-cost and sustainable approach to immobilize nanostructured TiO2 on carbon fibers for environmental remediation.

Original languageEnglish
Pages (from-to)659-669
Number of pages11
JournalJournal of Hazardous Materials
Volume263
DOIs
Publication statusPublished - 15 Dec 2013

Fingerprint

Cotton Fiber
Nanotubes
Coloring Agents
Adsorption
Spectrum Analysis
Electrons
Photoelectron Spectroscopy
Raman Spectrum Analysis
Transmission Electron Microscopy
Atmosphere

Keywords

  • Carbonization
  • Cotton fibers
  • Electron microscopy
  • Photocatalytic dye degradation

Cite this

Wang, Bin ; Karthikeyan, Rengasamy ; Lu, Xiao Ying ; Xuan, Jin ; Leung, Michael K H. / High photocatalytic activity of immobilized TiO2 nanorods on carbonized cotton fibers. In: Journal of Hazardous Materials. 2013 ; Vol. 263. pp. 659-669.
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High photocatalytic activity of immobilized TiO2 nanorods on carbonized cotton fibers. / Wang, Bin; Karthikeyan, Rengasamy; Lu, Xiao Ying; Xuan, Jin; Leung, Michael K H.

In: Journal of Hazardous Materials, Vol. 263, 15.12.2013, p. 659-669.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High photocatalytic activity of immobilized TiO2 nanorods on carbonized cotton fibers

AU - Wang, Bin

AU - Karthikeyan, Rengasamy

AU - Lu, Xiao Ying

AU - Xuan, Jin

AU - Leung, Michael K H

PY - 2013/12/15

Y1 - 2013/12/15

N2 - In this study, TiO2 nanorods were successfully immobilized on carbon fibers by a facile pyrolysis of natural cotton in nitrogen atmosphere followed by a one-pot hydrothermal method. Carbonized cotton fibers (CCFs) and TiO2-CCFs composites were characterized using field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffractometer (XRD), diffuse reflectance UV-vis spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Results implied that the band gap narrowing of TiO2 was achieved after integration of CCFs. Dye adsorption isotherm indicated that the maximum dye adsorption capacity (qm) of CCFs-1000 (13.4mg/g) was 2 times higher than that of cotton fibers and qm of TiO2-CCFs-1000 (9.0mg/g) was 6-7 times higher than that of TiO2 nanorods. Photocatalytic activity of TiO2 nanorods prepared with 3mL Ti(OBu)4 showed the highest photocatalytic activity. TiO2-CCFs-1000 exhibited higher activity than TiO2 immobilized on CCFs-400, CCFs-600 and CCFs-800. Good photostability of TiO2-CCFs-1000 was found for dye degradation under visible light irradiation. The enhancement of photocatalytic dye degradation was due to the high adsorptivity of dye molecules, enhanced light adsorption and effective separation of electron-hole pairs. This work provides a low-cost and sustainable approach to immobilize nanostructured TiO2 on carbon fibers for environmental remediation.

AB - In this study, TiO2 nanorods were successfully immobilized on carbon fibers by a facile pyrolysis of natural cotton in nitrogen atmosphere followed by a one-pot hydrothermal method. Carbonized cotton fibers (CCFs) and TiO2-CCFs composites were characterized using field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffractometer (XRD), diffuse reflectance UV-vis spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Results implied that the band gap narrowing of TiO2 was achieved after integration of CCFs. Dye adsorption isotherm indicated that the maximum dye adsorption capacity (qm) of CCFs-1000 (13.4mg/g) was 2 times higher than that of cotton fibers and qm of TiO2-CCFs-1000 (9.0mg/g) was 6-7 times higher than that of TiO2 nanorods. Photocatalytic activity of TiO2 nanorods prepared with 3mL Ti(OBu)4 showed the highest photocatalytic activity. TiO2-CCFs-1000 exhibited higher activity than TiO2 immobilized on CCFs-400, CCFs-600 and CCFs-800. Good photostability of TiO2-CCFs-1000 was found for dye degradation under visible light irradiation. The enhancement of photocatalytic dye degradation was due to the high adsorptivity of dye molecules, enhanced light adsorption and effective separation of electron-hole pairs. This work provides a low-cost and sustainable approach to immobilize nanostructured TiO2 on carbon fibers for environmental remediation.

KW - Carbonization

KW - Cotton fibers

KW - Electron microscopy

KW - Photocatalytic dye degradation

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DO - 10.1016/j.jhazmat.2013.10.029

M3 - Article

VL - 263

SP - 659

EP - 669

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

ER -