期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 622, 期 -, 页码 284-297出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.04.113
关键词
Flower-like; Co-catalyst; Photo-Fenton; Binary dyes; Degradation pathways
资金
- Fundamental Research Funds for the Universities of Gansu Province
- Key Laboratory of Ecofunctional Polymer Materials of the Ministry of Education
In this study, flower-like FeMoO4@1T-MoS2 composites were prepared and used for photo-Fenton catalysis degradation of MB and RhB dyes. The highest degradation efficiency was achieved when the Mo/Fe molar ratio was 1:1. Kinetics models and DFT simulations revealed the adsorption and activation of H2O2 by the composite. The degradation pathways were determined by LC-MS and quenching experiments.
Right here, flower-like FeMoO4@1T-MoS2 composites were prepared by modifying FeMoO4 microspheres with two-dimensional lamellar 1T-MoS2 as co-catalyst, which was used for photo-Fenton catalysis degradation of binary dyes mixed with methylene blue (MB) and rhodamine B (RhB). Then various parameters affecting the generation of center dot OH in the system were investigated. Systematic research shows that the degradation efficiency of MB and RhB can reach 99.8% in 18 min when the Mo/Fe molar ratio of the composite is 1:1. Furthermore, these experiments data were fitted by pseudo-first order kinetics model and pseudo-second order kinetics model. Subsequently the density functional theory (DFT) simulation results showed that FeMoO4 exhibited excellent adsorption for H2O2, and the introduction of 1T-MoS2 played a certain role in the adsorption and activation of H2O2. Finally, the degradation pathways of MB and RhB were proposed to determine intermediates during photo-Fenton process by LC-MS and the reaction mechanism was detailed investigated by quenching experiment of active free radicals. FeMoO4@1T-MoS2 has also excellent stability and highlights the potential and prospect of the composite for dye wastewater treatment.(c) 2022 Elsevier Inc. All rights reserved.
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