Simultaneous excitation of PdCl₂ hybrid mesoporous g-C₃N₄ molecular/solid-state photocatalysts for enhancing the visible-light-induced oxidative removal of nitrogen oxides

Zizhong ZHANG, Mukun XU, Wing Kei HO, Xianwen ZHANG, Zhenya YANG, Xuxu WANG

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22 Citations (Scopus)

Abstract

A simple and efficient molecular/solid-state hybrid photocatalyst consisting of noble metal (i.e., Auᴵᴵᴵ, Ptᴵᵛ, and Pdᴵᴵ) chlorides-functionalized-mesoporous graphitic carbon nitride (mpg-CN) was developed to improve the photocatalytic performance of mpg-CN toward NO removal. Compared with the parent mpg-CN, the optimal 1% PdCl₂ modified mpg-CN increased the conversion efficiency by approximately 33%, improved the inhibiting efficiency of NO₂ release by approximately three times, and promoted the long term stability of photocatalysts for NO removal in a continuous flow model reaction system. The prepared samples were characterized by X-ray diffraction, transmission electron microscopy with energy-dispersive X-ray spectroscopy elemental mapping, ultraviolet–visible light absorbance spectroscopy, X-ray photoelectron spectroscopy, photoluminescence emission spectroscopy and electron paramagnetic resonance spectroscopy. The ultrafast charge separation and efficient generation of O₂•⁻ oxygen species were achieved by the charge transfer model of PdCl₂/mpg-CN similar to the solid-state Z-scheme system. This charge transfer model contributed to the high photocatalytic performance of the prepared PdCl₂/mpg-CN molecular/solid-state hybrid photocatalyst. Copyright © 2015 Elsevier B.V.
Original languageEnglish
Pages (from-to)174-181
JournalApplied Catalysis B: Environmental
Volume184
Early online dateNov 2015
DOIs
Publication statusPublished - May 2016

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Citation

Zhang, Z., Xu, M., Ho, W., Zhang, X., Yang, Z., & Wang, X. (2016). Simultaneous excitation of PdCl₂ hybrid mesoporous g-C₃N₄ molecular/solid-state photocatalysts for enhancing the visible-light-induced oxidative removal of nitrogen oxides. Applied Catalysis B: Environmental, 184, 174-181.

Keywords

  • mpg-CN
  • PdCl₂ hybrid
  • Z-scheme
  • NO removal
  • Photocatalysis