4.7 Article

TiO2 nanosheet supported MnCeOx: a remarkable catalyst with enhanced low-temperature catalytic activity in o-DCB oxidation

Journal

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 42, Pages 63533-63544

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-20065-9

Keywords

TiO2 nanosheet; MnCeOx; TiO2; Polychlorinated aromatic hydrocarbons; Catalytic oxidation; o-Dichlorobenzene; Morphology engineering

Funding

  1. Ministry of Science and Technology of China [2020YFC1808603]
  2. National Natural Science Foundation of China [21876042, 22020102004, 22108058, 22106036]
  3. Natural Science Foundation of Hebei Province [B2019202200, B2020202057, 21374204D, B2020202061]

Ask authors/readers for more resources

Morphology engineering is an effective strategy for catalysis, and TiO2 nanosheet supported MnCeOx exhibits excellent catalytic activity, enhanced water resistance, and good stability.
Morphology engineering was an effective strategy for 1,2-dichlorobenzene (o-DCB) oxidation. Herein, TiO2 nanosheet supported MnCeOx (TiMn15Ce30-NS) showed excellent catalytic activity with T-50% = 156 degrees C and T-90% = 238 degrees C, which was better than the T-50% = 213 degrees C and T-90% = 247 degrees C for TiO2 nano truncated octahedron supported MnCeOx (TiMn15Ce30-NTO). TiMn15Ce30-NS also exhibited enhanced water resistance (T-50% = 179 degrees C, T-90% = 240 degrees C), and good stability with the o-DCB conversion retained at 98.9% for 12 h at 350 degrees C. The excellent catalytic activity of TiMn15Ce30-NS could be mainly ascribed to the preferentially exposed {001} crystal plane and Ce addition which favored the higher concentration of Mn4+ and surface active oxygen, along with stronger interaction between MnOx and CeOx. The present results deepen the understanding of the morphology-dependent effect on o-DCB oxidation.

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