Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 5, Pages 3263-3266Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2008.09.031
Keywords
Carbon nanotubes; Titanium oxide; Surface treatment; X-ray diffraction
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Funding
- Foundation of National Natural Science, PR China [10332020]
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In this paper, nanosize titanium dioxide (TiO2) deposited on pristine and acid treated carbon nanotubes (CNTs) were prepared by a modified sol-gel method. The nanoscale materials were extensively characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR) and Raman spectra. The results indicated that about 6.8 nm TiO2 nanoparticles were successfully deposited on acid-treated CNTs surface homogeneously and densely, which was smaller than TiO2 coated on pristine CNTs. The surface state of CNTs was a critical factor in obtaining a homogeneous distribution of nanoscale TiO2 particles. Acid oxidization could etch the surface of CNTs and introduce functional groups, which were beneficial to controllable homogeneous deposition. The TiO2 coated on acid-treated CNTs was used as photocatalyst for Reactive Brilliant Red X-3B dye degradation under UV irradiation, which showed higher efficiency than that of TiO2 coated on pristine CNTs and commercial photocatalyst P25. (C) 2008 Elsevier B.V. All rights reserved.
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