Enhanced visible light responsive MWCNT/TiO2 core-shell nanocomposites as the potential photocatalyst for reduction of CO2 into methane

Meei Mei Gui, Siang Piao Chai*, Bo Qing Xu, Abdul Rahman Mohamed

*Corresponding author for this work

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

This work demonstrates the synthesis of MWCNT/TiO2 core-shell nanocomposites and their application for photocatalytic reduction of CO 2 under visible light irradiation. MWCNT/TiO2 core-shell nanocomposites were obtained from a newly developed coating approach. UV-vis analysis revealed that the photoactivity of the nanocomposites in the visible light range was significantly enhanced with the absorption edge extended to the visible light region (>400 nm). The XRD and Raman analysis indicated that the TiO2 shell layer was composed of anatase TiO2 nanocrystallite prevailing grew along the (1 0 1) direction. The MWCNT/TiO 2 core-shell nanocomposites exhibited conversion of CO2 into methane in a continuous process under a low power visible light irradiation at atmospheric pressure. The highest methane yield of ca. 0.17 μmol/g-catalyst/h was recorded at the 6th hour of irradiation time.

Original languageEnglish
Pages (from-to)183-189
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume122
DOIs
Publication statusPublished - 01 Mar 2014
Externally publishedYes

Keywords

  • CO photoreduction
  • Core-shell
  • MWCNT/TiO
  • Nanocomposites
  • Photocatalysis
  • Visible light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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