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Synthesis of nitrogen-doped carbon nanotubes-FePO4 composite from phosphate residue and its application as effective Fenton-like catalyst for dye degradation
journal contribution
posted on 2022-10-26, 05:18 authored by L Wei, Yi Zhang, S Chen, L Zhu, X Liu, Lingxue KongLingxue Kong, L WangPhosphate residue is regarded as a hazardous waste, which could potentially create significant environmental and health problems if it is not properly treated and disposed of. In this study, nitrogen-doped carbon nanotubes-FePO4 (NCNTs-FePO4) composite was successfully synthesized from phosphate residue, and its application as an effective catalyst was explored. Firstly, an effective method was developed to recover FePO4 from phosphate residue, achieving an impressive FePO4 mass recovery rate of 98.14%. Then, the NCNTs-FePO4 catalyst was synthesized from the recovered FePO4 by two main reactions, including surface modification and chemical vapor deposition. Finally, the synthesized NCNTs-FePO4 was applied to photo-degrade 15 mg/L Rhodamine B (RhB) in a Fenton-like system. The results showed that 98.9% of RhB could be degraded in 60 min, closely following the pseudo-first-order kinetics model. It was found that even after six consecutive cycles, NCNTs-FePO4 still retained a high catalytic capacity (> 50%). Moreover, •OH radicals participating in the RhB degradation process were evidenced using quenching experiments and electron paramagnetic resonance analysis, and a rational mechanism was proposed. It was demonstrated that the materials synthesized from hazardous phosphate residue can be used as an effective catalyst for dye removal.
History
Journal
Journal of Environmental Sciences (China)Volume
76Pagination
188 - 198Publisher DOI
ISSN
1001-0742eISSN
1878-7320Copyright notice
2018, The Research Center for Eco-Environmental Sciences, Chinese Academy of SciencesUsage metrics
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No categories selectedKeywords
Science & TechnologyLife Sciences & BiomedicineEnvironmental SciencesEnvironmental Sciences & EcologyPhosphate residueFenton-likeNitrogen-doped carbonnanotubes-FePO4Hydroxyl radicalMETAL-ORGANIC FRAMEWORKAQUEOUS-SOLUTIONELECTROCHEMICAL PERFORMANCEHYDROGEN-PEROXIDEACTIVATED CARBONGRAPHENE OXIDEAMOXICILLINADSORPTIONFEPO4FENitrogen-doped carbon nanotubes-FePO(4)Nitrogen-doped carbon nanotubes-FePO4
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