Sonochemical degradation of reactive black 5 with a composite catalyst of TiO2/single-walled carbon nanotubes

Eunju Cho, Jongbok Choi, Yonghyeon Lee, Jeong Min Park, Jeehyeong Khim

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6 Citations (Scopus)

Abstract

In the sonocatalytic process, composites of TiO2-carbon were used because carbon provides more adsorption sites and acts like an electron sink to prevent the recombination of an electron/hole. Therefore, in the present study, the characteristics of a TiO2/single-walled carbon nanotubes catalyst (TiO2/SWCNTs) have been investigated, and the optimal weight ratio of SWCNTs and the dose for degradation of reactive black 5 (RB5) were also evaluated. TiO2/SWCNT composite was characterized using Brunauer-Emmett-Teller analysis, scanning electron microscopy, energy-dispersive X-ray diffraction microanalysis and spectra, and X-ray diffraction patterns. The degradation rate constants of RB5 with the ratio of SWCNTs were found to depend on the adsorption phenomenon of a surface catalyst, light absorbance, and the recombination of electrons and holes. As a result, the optimal ratio of carbon in the sono-TiO2/SWCNTs process for degradation of RB5 was TiO2 : SWCNTs = 200 : 1. Additionally, the optimal dose of the catalyst was 0.5 g/L.

Original languageEnglish
Article number07HE08
JournalJapanese journal of applied physics
Volume52
Issue number7 PART 2
DOIs
Publication statusPublished - 2013 Jul

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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