High-temperature sintered 3D-printed alumina as mechanically robust supports for MOF catalysis.

We demonstrate the functionalization of high-temperature sintered, 3D-printed α-alumina ceramics with ZIF-8 and MOF-808 to create robust MOF-ceramic composites. Dense α-alumina sintered at 1450-1650 °C can be directly functionalized despite its low surface hydroxyl density. The composites unite MOF activity with the mechanical strength and design freedom of additive-manufactured ceramics. Using MOF-808, rapid and complete degradation of dimethyl-4-nitrophenyl phosphate (DMNP) was achieved, with cycling tests confirming strong MOF adhesion. Grid-like printed geometries provided high surface area and handling advantages, eliminating centrifugation and filtration required for powders. This work establishes a scalable platform for integrating MOFs with mechanically resilient, architected ceramics for further applications, such as catalysis, separations, and water treatment.