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文獻名：Robust ceramic nanofibrous membranes with ultra-high water flux and nanoparticle rejection for self-standing ultrafiltration

 

 

作者： Juan Jiang^a， Na Ni^bc， Weiwei Xiao^c， Xiaofeng Zhao^a， Fangwei Guo^a， Xiaohui Fan^a， Qi Ding^c， Wei Hao^a， Ping Xiao^a

^aSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

^bKey Lab of Education Ministry for Power Machinery and Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

^cGas Turbine Research Institute, Shanghai Jiao Tong University, Shanghai 200240, China

 

 

摘要：Ceramic electrospun nanofibrous membranes (ENMs) are ideal candidates for ultrafiltration applications in harsh environments. However, it has been a great challenge to fabricate ceramic ENMs with sufficient strengths to withstand the water pressure duo to their intrinsic brittleness. In this study, we report an ultra-strong Y₃Al₅O₁₂-Al₂O₃ ENM employing graphene oxide (GO) as a sacrificing additive for the first time. The optimized membrane exhibits tensile strengths of 5.63 ± 0.31 MPa after sintering at 900 °C and 3.48 ± 0.44 MPa at 1000 °C. The high strength of the membrane ensures it to be used independently under a pressure up to 160 K Pa. An excellent nano-particle filtration performance is achieved with a high permeation flux of 5718–8494 L m⁻² h⁻¹ bar⁻¹ and high rejection efficiencies above 99.75 % in both neutral and acidic water conditions. The work demonstrates a facile route for effective strengthening of ceramic ENMs with their great potential in harsh-environment self-standing ultrafiltration applications.

 

關鍵詞：Y₃Al₅O₁₂-Al₂O₃ nanofibrous membranes；Graphene-Oxide (GO)；Enhanced strength；Ultra-high water flux；Nanoparticle rejection