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3D micro-meso-porous lamellar catalytic filter derived from wood and chitosan activating peroxymonosulfate for degradation of antibiotics: Roles of delignification and carbon layer encapsulating
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DOI：10.1016/j.seppur.2025.136405.png)
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Abstract
En 中文
Developing high-performance 3D micro-meso-porous lamellar catalytic filters is a key challenge in organic wastewater purification. Hence, a high-efficiency lamellar catalytic membrane for the degradation of doxycycline (DTC) by leveraging wood's inherent well-aligned liquid transport channels and chitosan's (CS) excellent metal chelating/film-forming properties was fabricated. The carbon skeleton's uniformly distributed micron-sized vertical channels facilitate rapid fluid transport and strengthen interactions among DTC, PMS, and catalytically active sites. Wood delignification and Fe/urea doping enhanced the active site density of FePCN30@CS0.5-700-0.1, while CS deposition improved its mechanical strength and structural stability, synergistically promoting catalytic performance. Under continuous filtration, the catalyst achieved 82.74 % DTC degradation, with excellent mechanical strength, stability, and broad applicability. Experiments demonstrated that Fe0, Fe3C, pyridine N and graphite N as the potential active centers, and SO4•−, O2•−, and 1O2 as the main reactive oxygen species in the FePCN30@CS0.5-700-0.1/PMS system. Integrating multiple catalytic membranes enables the construction of a flow-through reactor for continuously degrading organic pollutants, which presents great potential for wastewater treatment and environmental pollution mitigation.
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