Figure 18.

Optical images of DIW fabricated ZnO structures – a) cylindrical lattice with simple‐tetragonal symmetry with 10 layers and 200 µm rod spacing, b) square lattice with face‐cantered‐tetragonal symmetry with 20 layers and 566 µm rod spacing and SEM images of ZnO square lattice sintered at (c) 900 °C and (d) 1500 °C. Reproduced with permission.208 Copyright 2016, Elsevier. e) CAD images of the monolithic support designed and made by SLA: static mixer (SM), double spiral (DS), quadruple spiral (QS) and crossed channels (CC). Reproduced with permission.207 Copyright 2010, Elsevier. Silicone microreactor for photocatalytic generation of hydrogen – f) Schematics of silicone photoreactor fabrication steps. Reproduced with permission.209 Copyright 2016, Elsevier. g) Optical image of silicone microreactor loaded with Au/TiO₂ photocatalyst. Reproduced with permission.210 Copyright 2017, Elsevier.