Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 284, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119720
Keywords
Magnetic MXene nanosheets; nZVI particles; Heterogeneous fenton-like; Ranitidine
Funding
- National Natural Science Foundation of China [51708325, 52000113]
- Committee of Science and Technology Innovation of Shenzhen [KQJSCX20180320171226768, JCYJ20190813163401660]
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Magnetic nanoscale zero-valent iron (nZVI)@Ti3C2-based MXene nanosheets were synthesized and characterized as a novel Fenton-like catalyst for ranitidine degradation. The nanosheets exhibited enhanced chemical reactivity and stability, effectively decomposing ranitidine molecules through hydroxyl radicals attack. Additionally, the catalyst showed good applicability under a wide pH range, providing new insights into nZVI surface inactivation mode.
Magnetic nanoscale zero-valent iron (nZVI)@Ti3C2-based MXene nanosheets were synthesized via an in-situ reductive deposition method, and were characterized as a novel Fenton-like catalyst for ranitidine degradation. The vast majority of ranitidine was found to be mineralized after 30 min of reaction time with 91.1 % of removal efficiency and the removal of 63.3 % of total organic carbon (TOC). Results showed that the nZVI@Ti3C2-based MXene nanosheets had a synergistic effect enhancing the catalyst chemical reactivity and stability. In particular, Ti3C2-based MXene was found to restrain the agglomeration of nZVI particles (nZVIPs) and promote electron transfer between magnetic particles with a diameter of approximately 10-40 nm. Ranitidine molecules were decomposed mainly by hydroxyl radicals (center dot OH) attack especially the surface-bound center dot OHads. This study provided a completely new insight into the mode of surface inactivation of nZVIPs under different solution pH conditions, establishing that this novel catalyst was suitable for use under a wide pH range.
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