Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 626, Issue -, Pages 639-652Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.06.079
Keywords
Heterojunction; Z-scheme routine; Photo-Fenton reaction; Photocatalysis; Pollutant degradation
Categories
Funding
- National Natural Science Foundation of China [21674028]
- Foundation of State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering [21674028]
- Natural Science Foundation of Heilongjiang Province, China [2021-K17]
- Fundamental Research Funds for Heilongjiang Province Universities [LH2020B020]
- Open Project of Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education
- [KJCX201911]
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The Photo-Fenton reaction combining the photocatalytic reaction and Fenton reaction showed excellent degradation performance. Fe-C3N4/Ti3C2/C-TiO2 catalyst exhibited high photothermal effect, enhanced H2O2 activation, and at least 4.2 times higher degradation rate compared to reference catalysts.
Photo-Fenton reaction combining the photocatalytic reaction and Fenton reaction showed excellent degradation performance. However, it highly demanded the catalysts to display outstanding activity in these two reactions. Herein, Fe-doped carbon nitride/MXenes-derived C-TiO2/Ti3C2 (Fe-C3N4/Ti3C2/C-TiO2) was prepared via two steps: Fe-C3N4 and Ti3C2 were assembled via face-to-face attachment, following by in-situ partial oxidation of Ti3C2 to C-TiO2. DFT predicted a Z-scheme charge transfer routine via metallic Ti3C2 as bridge, which was verified by EPR and radical trapping experiments. Additionally, PDOS calculation revealed the charge density around the doped-Fe atoms was remarkably increased, leading to better H2O2 activation, which was experimentally confirmed by high yield of (OH)-O-center dot. Moreover, Fe-C3N4/Ti3C2/C-TiO2 possessed the high photothermal effect to accelerate the surface reaction. By taking advantage of these merits, the degradation rate of Fe-C3N4/Ti3C2/C-TiO2 was at least 4.2 times higher than the reference catalysts. Our work provided an insight toward the g-C3N4/TiO2-based photo-Fenton catalysts with high performance. (C) 2022 Elsevier Inc. All rights reserved.
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