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Effect of the Oxygen Vacancies in CeO 2 by the Ce 3+ Incorporation to Enhance the Photocatalytic Mineralization of Phenol
Author(s) -
MéndezSalazar Sandra,
AguilarMartínez Octavio,
PiñaPérez Yanet,
PérezHernández Raúl,
SantolallaVargas Carlos E.,
Gómez Ricardo,
Tzompantzi Francisco
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100459
Subject(s) - photocatalysis , mineralization (soil science) , phenol , oxygen , raman spectroscopy , materials science , precipitation , inorganic chemistry , nuclear chemistry , catalysis , photochemistry , chemical engineering , chemistry , organic chemistry , nitrogen , physics , meteorology , optics , engineering
In this paper, the phenol mineralization by Ce 3+ ‐doped CeO 2 by photocatalysis at room temperature, is shown for the first time. The photocatalytic behavior of CeO 2 was improved through the incorporation of Ce 3+ into its crystalline lattice. The materials were prepared by the precipitation method at low temperatures varying the Ce 4+ :Ce 3+ molar ratio of the precursors during the synthesis process. It is worth noting that, the synthesized photocatalysts did not carry out a thermal treatment after their preparation. The results obtained from Raman analysis demonstrated the formation of oxygen vacancies by the incorporation of Ce 3+ . The improvement of the photocatalytic activity was attributed to an optimal content of Ce 3+ which promoted structural defects (such as oxygen vacancies). Radical species, such as O 2 .− , are mainly formed during the photocatalytic process, which are probably the main responsible for inducing the mineralization process of the studied pollutant.