Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 6, Pages 7227-7237Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20832
Keywords
3D printing; metallic glass; advanced oxidation processes; wastewater treatments; reusability
Funding
- National Natural Science Foundation of China [51531003, 51771077, 51871102]
- National Key R&D Program of China [2016YFB1100101]
- Key R&D Program of Hubei [2020BAB075]
- Hubei Science Fund for Distinguished Young Scholars [2020CFA086]
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The study introduces a novel strategy to design efficient and reusable catalysts by incorporating Cu into a metallic glass-based catalyst and constructing three-dimensional hierarchical porous structures through laser 3D printing. The resulting catalysts show outstanding catalytic efficiency and exceptional reusability in degrading dyes.
Finding highly efficient and reusable catalysts for advanced oxidation processes is a crucial endeavor to resolve the severe water pollution problems. Although numerous nanocatalysts have been developed in the past few decades, their recyclability along with sustainably high catalytic efficiency still remain challenging. Here, we propose a new strategy for designing efficient and reusable catalysts, that is, introducing Cu as a reductant into a metallic glass-based catalyst and constructing three-dimensional hierarchical porous architectures via a laser 3D printing technique. The as-printed 3D porous MG/Cu catalysts exhibit exceptional catalytic efficiency in degrading RhB with a normalized rate constant approximately 620 times higher than commercial nano zero-valent iron, outperforming most reported Fenton-type catalysts so far. Strikingly, the catalysts exhibit an excellent reusability and can be used more than 100 times (the highest record so far) without apparent efficiency decay. It is revealed that Cu-doping could improve the surface reducibility and promote the electronic transfer, rendering the 3D-printed MG/Cu catalysts with a sustainably active Fe(II)-rich surface and, therefore, unprecedented reusability. This work offers a broadly applicable design route for the development of advanced catalysts with an outstanding combination of activity and reusability for wastewater treatments.
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