Boron-doped TiO2-CNT nanocomposites with improved photocatalytic efficiency toward photodegradation of toluene gas and photo-inactivation of Escherichia coli

Valmiki B. Koli, Shyue Chu Ke, Ananta G. Dodamani, Shamkumar P. Deshmukh, Jung Sik Kim

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22 Scopus citations

Abstract

An in-situ sol-gel method was used for the synthesis of boron-doped TiO2-CNT nanocomposites with varied boron concentrations from 1 to 4 mol%. The synthesized nanocomposites were characterized by various techniques, namely XRD, UV-DRS, TEM, PL, and XPS; all results show that 3 mol% B-TiO2-CNT nanocomposites have superior properties to pure TiO2, 3B-TiO2 nanoparticles, and other nanocomposites. TEM images clearly show the B-TiO2 nanoparticles decorated on the CNT surface. Photo-luminescence studies confirm that boron doping of up to 3 mol% in TiO2-CNT nanocomposites reduces the electron-hole pair recombination rate. The photocatalytic performance of the B-TiO2-CNT nanocomposites was tested against the photodegradation of toluene gas and the photocatalytic inactivation of E. coli in the presence of UV and visible light respectively. B-TiO2-CNT (3 mol%) nanocomposites show the highest photocatalytic activity.

Original languageEnglish
Article number632
JournalCatalysts
Volume10
Issue number6
DOIs
StatePublished - Jun 2020

Keywords

  • B-TiO-CNT nanocomposites
  • Organic pollutants
  • Photocatalysis
  • UV and visible light

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