Journal
NPJ MATERIALS DEGRADATION
Volume 5, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41529-020-00147-0
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Funding
- Fundamental Research Funds for the Central Universities [FRF-TP-19-080A1]
- China Postdoctoral Science Foundation [2019M660452]
- National Natural Science Foundation of China [51671016, 51831001]
- Creative Research Groups of China [51921001]
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By constructing hierarchical micro/nano-dual-scale sized pores on the inner cell walls, the high Nb containing TiAl-based porous composite microfiltration membrane demonstrates excellent particulate matter removal efficiency and high-temperature oxidation/sulfidation performance.
Porous intermetallic membrane with extensive interconnected pores are potential candidates as functional materials for high-temperature particulate matter (PM) capturing. However, fabrication of intermetallic membrane with a combined performance of high filtration efficiency and high-temperature oxidation resistance remains a challenge. To tackle this issue, a hierarchical micro-/nano-dual-scale sized pores was constructed on the inner cell walls of a porous support through mutual diffusion and chemical reaction. Benefited from its hierarchical micro/nano-dual-scaled pore structural features, the high Nb containing TiAl-based porous composite microfiltration membrane demonstrates ultrahigh PM>2.5 removal efficiency (99.58%) and favorable oxidation/sulfidation performance at high temperature. These features, combined with our experimental design strategy, provide insight into designing high-temperature PM filtration membrane materials with enhanced performance and durability.
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