The surface engineered alumina microfiltration membranes were directly realized based on the rationally designed core-shell particles. Specifically, a thin SiO₂ layer was deposited on the Al₂O₃ particles, and the thus-obtained core-shell particles were then assembled on porous substrates to form the selective layer. The surface of Al₂O₃@SiO₂ core-shell particles was demonstrated to be negatively charged. Benefiting from the SiO₂ nanolayers, the membranes consisting of the core-shell structured particles showed improved surface hydrophilicity, water permeability and antifouling properties together with a well-maintained porous structure. Notably, the core-shell membranes presented increased water permeance of 1377.3 ± 18.0 LMH along with a reduction of ∼10% in organic irreversible fouling, compared with the pristine alumina membranes (927.3 ± 8.0 LMH). The surface engineering strategy based on the rationally designed ceramic powders would pave a broad avenue to fabricate highly permeable and antifouling ceramic membranes for water and wastewater treatment.

基于合理设计的核-壳颗粒直接实现了表面工程氧化铝微滤膜。具体地，在Al ₂ O ₃颗粒上沉积SiO ₂薄层，然后将如此获得的核-壳颗粒组装在多孔基板上以形成选择层。已证明Al ₂ O ₃ @SiO ₂核-壳颗粒的表面带负电。受益于SiO ₂纳米层，由核-壳结构的颗粒组成的膜表现出改善的表面亲水性，透水性和防污性能以及良好维护的多孔结构。值得注意的是，与原始氧化铝膜（927.3±8.0 LMH）相比，核-壳膜的透水率提高了1377.3±18.0 LMH，有机不可逆结垢减少了约10％。基于合理设计的陶瓷粉末的表面工程策略将为制造用于水和废水处理的高渗透性和防污陶瓷膜铺平广阔的道路。