Increasing both clean water and green energy demands for survival and development are the grand challenges of our age. Here, we successfully fabricate a novel multifunctional 3D graphene-based catalytic membrane (3D-GCM) with active metal nanoparticles (AMNs) loading for simultaneously obtaining the water purification and clean energy generation, via a “green” one-step laser scribing technology. The as-prepared 3D-GCM shows high porosity and uniform distribution with AMNs, which exhibits high permeated fluxes (over 100 L m⁻² h⁻¹) and versatile super-adsorption capacities for the removal of tricky organic pollutants from wastewater under ultra-low pressure-driving (0.1 bar). After adsorption saturating, the AMNs in 3D-GCM actuates the advanced oxidization process to self-clean the fouled membrane via the catalysis, and restores the adsorption capacity well for the next time membrane separation. Most importantly, the 3D-GCM with the welding of laser scribing overcomes the lateral shear force damaging during the long-term separation. Moreover, the 3D-GCM could emit plentiful of hot electrons from AMNs under light irradiation, realizing the membrane catalytic hydrolysis reactions for hydrogen energy generation. This “green” precision manufacturing with laser scribing technology provides a feasible technology to fabricate high-efficient and robust 3D-GCM microreactor in the tricky wastewater purification and sustainable clean energy production as well.

为了生存和发展，增加清洁水和绿色能源的需求是我们这个时代面临的重大挑战。在这里，我们成功地制造了一种新型多功能 3D 石墨烯基催化膜 (3D-GCM)，其负载有活性金属纳米粒子 (AMN)，通过“绿色”一步激光划线技术同时获得水净化和清洁能源发电。所制备的 3D-GCM 显示出高孔隙率和均匀分布的 AMN，表现出高渗透通量（超过 100 L m ^-2  h ^-1) 和多功能的超吸附能力，可在超低压驱动 (0.1 bar) 下去除废水中棘手的有机污染物。吸附饱和后，3D-GCM 中的 AMNs 启动高级氧化过程，通过催化作用自清洁污染膜，并为下一次膜分离很好地恢复吸附能力。最重要的是，具有激光划线焊接的 3D-GCM 克服了长期分离过程中的横向剪切力破坏。此外，3D-GCM 可以在光照射下从 AMNs 释放出大量的热电子，实现用于氢能产生的膜催化水解反应。