1. Micro-/Nano-Dual-Scale Porous Composite Membranes for the Separation of Nanopollutants from Water
- Author
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Junpin Lin, Wanyuan Gui, Kuang Lv, Yingchao Guo, Yuhai Qu, Hui Zhang, and Jianru Liang
- Subjects
Materials science ,Kirkendall effect ,Alloy ,Sintering ,Nanoparticle ,engineering.material ,law.invention ,Membrane ,Chemical engineering ,law ,Powder metallurgy ,engineering ,General Materials Science ,Porosity ,Filtration - Abstract
Novel micro-/nano-dual-scale porous composites have been fabricated for nanopollutant filtration by powder metallurgy via four-step sintering of Ti, Al, and Nb powders incorporated with SiO2/ZrO2/Y2O3/MgO/ZnO nanoparticles, respectively. Afterward, phase formation, surface morphology, and pore features of the porous composites have been characterized with the changes of heat-treatment temperatures and additive nanoparticles. The separation efficiency of as-prepared Ti-48Al-6Nb porous alloy and porous composite membranes for 50 mg/L TiO2 nanopollutants from pure water can be calculated through determining the change of TiO2 concentrations after filtration. Compared with the Ti-48Al-6Nb porous alloy membrane with a separation efficiency of 89.91%, all porous composite membranes can enhance the separation efficiency up to 99.80%. In particular, favorable contributions of the porous composite membrane with nano-SiO2 are further ascertained by maintaining a high separation efficiency of above 99.95% after repe...
- Published
- 2019