It is a great challenge to selectively translating a pollutant into a valuable product from multi-component organic pollutants for waste treatment. Herein, we design and then fabricate a novel thermo-responsive bilayer composite membrane realizing the selective separation, catalytic transformation and in situ product separation from two-component pollutants in a one-step. This bilayer membrane systematically characterized by FTIR, XPS, SEM and AFM and the other techniques, comprises a top semi- interpenetrating polymer network(semi-IPN) coating layer and a bottom poly(vinylidene fluoride) @Pd catalytic layer. In a continuous cross-flow filtration process, the pollutant BSA is directly separated by the membrane, while the pollutant p-nitrophenol controllably penetrates through the top semi-IPN layer and then reacts in the catalytic layer; subsequently, the product p-aminophenol is in situ separated and collected. The reactant is purified before reaction, further, any unexpected reactions on membrane surface are avoided by isolating reactants from the catalysts via the top layer, preventing the interference of the unexpected pollutants and products for the catalytic transformation. The transformation efficiency can be strengthened by adjusting temperature and an maximum conversion of 99.74% can be obtained for a p-nitrophenol solution of 10 mg/L at a flux of 27.0 L•m⁻²•h⁻¹•bar⁻¹ and a temperature of 30℃.

从多组分有机污染物中选择性地将污染物转化为有价值的产品用于废物处理是一项巨大的挑战。在此，我们设计并制造了一种新型的热响应双层复合膜，可一步实现双组分污染物的选择性分离、催化转化和原位产物分离。这种双层膜通过 FTIR、XPS、SEM 和 AFM 和其他技术系统地表征，包括顶部半互穿聚合物网络（半 IPN）涂层和底部聚（偏二氟乙烯）@Pd 催化层。在连续错流过滤过程中，污染物 BSA 被膜直接分离，而污染物p-硝基苯酚可控地穿透顶部半IPN层，然后在催化层中反应；随后，就地分离和收集产物对氨基苯酚。反应物在反应前经过纯化，进一步通过顶层将反应物与催化剂隔离，避免了膜表面的任何意外反应，防止意外污染物和产物对催化转化的干扰。调节温度可提高转化率，对硝基苯酚溶液为10 mg/L，通量为27.0 L•m ^-2 •h ^-1 •bar ^-1和a温度30℃。