Effect of mesoporous g-C₃N₄ substrate on catalytic oxidation of CO over Co₃O₄

Heng YANG, Kangle LV, Junjiang ZHU, Qin LI, Dingguo TANG, Wing Kei HO, Mei LI, Sónia Alexandra Correia CARABINEIRO

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34 Citations (Scopus)

Abstract

Mesoporous graphitic carbon nitride (mpg-CN) was synthesized using Triton X-100, a surfactant containing a hydrophilic polyethylene oxide group and a tert-octyl-phenyl hydrophobic moiety, as a soft template. The obtained mpg-CN was used as a support for Co₃O₄, and this supported catalyst was used for CO oxidation. The effects of the amount of Triton X-100, weight ratio of Co₃O₄ to mpg-CN and calcination temperature on the catalytic performances for CO oxidation of Co₃O₄/mpg-CN composites were systematically studied. It was found that the presence of Triton X-100 not only retarded the polymerization of dicyandiamide, but also affected the microstructure of Co₃O₄. Bubbles formed because of the hydrophobic group of the surfactant Triton X-100 can be act as a soft template for the synthesis of mesoporous g-C₃N₄. The enhanced catalytic activity of Co₃O₄/mpg-CN was attributed to a synergistic effect, enlarged BET surface areas, increased Co³⁺ and lattice oxygen contents, and the porous structure of mpg-CN support. The high stability of 12.5% Co₃O₄/mpg-CN(¹·⁰) makes it a promising catalyst for practical applications. Copyright © 2017 Elsevier B.V.
Original languageEnglish
Pages (from-to)333-340
JournalApplied Surface Science
Volume401
Early online dateJan 2017
DOIs
Publication statusPublished - Apr 2017

Citation

Yang, H., Lv, K., Zhu, J., Li, Q., Tang, D., Ho, W., et al. (2017). Effect of mesoporous g-C₃N₄ substrate on catalytic oxidation of CO over Co₃O₄. Applied Surface Science, 401, 333-340

Keywords

  • Co₃O₄
  • CO oxidation
  • Mesoporous g-C₃N₄
  • Triton X-100
  • Dicyandiamide

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