Optimization of the Photocatalytic Testing Setup Using FDM 3D Printing Technology

This paper presents an evaluation of the suitability of various thermoplastic materials (ASA, PC/ABS, PETG/GF) for 3D printing (Fused Deposition Modelling method) of holders designed to secure thin silicon, and other substrates, with active materials for use in photocatalytic degradation of organic compounds in aqueous solutions. To minimize the impact of the holder on the photocatalysis process, the physicochemical and mechanical properties of the printed components were analysed. The results showed that the PETG/GF filament has minimal interaction with reactive media, strong chemical and UV resistance, and desirable mechanical properties. After analysing the test results, it was decided to use these materials to produce the holder. The FDM-designed and fabricated flower-shaped holder, constructed from PETG/GF, resulted in an over 20% increase in photocatalytic process efficiency. This improvement was attributed to both the increased active surface area of the photocatalyst and the optimized geometry, which enhanced light exposure and solution mixing.