npj Materials Degradation (Jan 2021)

High efficiency hierarchical porous composite microfiltration membrane for high-temperature particulate matter capturing

  • Wanyuan Gui,
  • Yuhai Qu,
  • Yongfeng Liang,
  • Yanli Wang,
  • Hui Zhang,
  • Benli Luan,
  • Junpin Lin

DOI
https://doi.org/10.1038/s41529-020-00147-0
Journal volume & issue
Vol. 5, no. 1
pp. 1 – 10

Abstract

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Abstract 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.