Additive manufacturing of Ni-Fe 2 O 3 -TiO 2 three-dimensional photocatalyst architectures Norma Alicia Ramos Delgado 1,2 , M.A. Gracia-Pinilla 1,3 , N. Boscher 4 , H. Gardeniers 1 , A. Susarrey-Arce 1 1 University of Twente, Netherlands, 2 National Technology Institute, Nuevo León. México, 3 Autonomous University of Nuevo Leon. México, 4 Luxembourg Institute of Science and Technology. Luxembourg Additive manufacturing (3D printing) is a rapid prototyping technology. 3D ceramic printing is a new approach that can be used to produce photocatalysts. 3D photocatalysts have the advantage of design flexibility, enhanced performance, cost-effective production, scalability, reproducibility, and reduced environmental impact, making them a promising approach for various applications in energy and environmental fields. In this work, we introduce a custom-made pre-ceramic photoresist that enables the fabrication of TiO 2 . For this, we first used a ligand exchange reaction between titanium (IV) butoxide and acrylic acid to synthesize titanium (IV) acrylate. The solution was combined with an acrylic monomer and a DLP photoinitiator, and the structures were printed, and washed. This technique, is sufficiently versatile, allowing heterostructure formation composed of Fe 2 O 3 and the addition of Ni catalyst. After thermal annealing at 550 o C, the structures are characterized to evaluate the chemical and optical composition and morphology features by XRD, SEM, EDX, Raman, UV-Vis, and optical microscopy. A proof of concept reaction is assessed to demonstrate the photocatalytic performance of the octet-truss lattice structures of around 5 mm 3 printed structures. Methylene blue degradation under UV light using a static batch system is used as a test reaction. All structures achieved 85% degradation of MB in 3h. References
1. Nano Lett. 2020. 20. 3513−3520 2. Adv. Optical Mater. 2022. 21072758 3. Adv. Mater. 2019. 31. 1901345
P46DD
Made with FlippingBook Learn more on our blog