20.500.12556/RUL-182676 Model-guided intensification of photocatalytic reactions in a parallel-plate microfluidic reactor with immobilized TiO$_2$ research data underlying the article We report the development of immobilized TiO₂ photocatalyst films integrated into a transparent microfluidic reactor for hydroxyl‑radical-based advanced oxidation. Spin-coated TiO₂ films using a TEOS binder were homogeneous, mechanically robust, and retained anatase crystallinity and optoelectronic properties. Structural and chemical characterization (FTIR, XRD, SEM-EDX, profilometry, CHNS) confirmed Ti–O–Si linkages, uniform elemental distribution, and UV-induced surface reorganization accompanied by increased roughness. Photocatalytic activity was evaluated using coumarin as a fluorescent probe to comparatively assess •OH-related activity. The films exhibited reproducible radical generation after UV preconditioning, while prolonged irradiation caused only minor surface deactivation. In a parallel-plate microfluidic reactor, significantly higher 7-hydroxycoumarin formation was achieved compared to batch operation, reflecting pronounced process intensification. The microfluidic system exhibited substantially improved photon utilization (approximately sixfold higher apparent quantum yield) and nearly three orders of magnitude higher volumetric productivity, demonstrating more efficient coupling between photon absorption, mass transport, and surface reaction under continuous-flow conditions. A two-dimensional convection–diffusion model with pseudo-first-order surface kinetics reproduced experimental trends and enabled estimation of apparent surface rate constants. Simulated concentration fields revealed operation in a photon- and surface-kinetics-controlled regime under the applied conditions. Overall, this work establishes a model-guided framework combining reproducible catalyst immobilization, quantitatively demonstrated microfluidic process intensification, and predictive analysis to support rational reactor design and the development of intensified photocatalytic systems. TiO$_2$ immobilized films parallel-plate microfluidic reactor advanced oxidation processes (aops) hydroxyl radical generation photocatalytic process intensification model-based design TiO$_2$ imobilizirani filmi mikrofluidni reaktor z vzporednimi ploščami napredni oksidacijski procesi generiranje hidroksilnih radikalov intenzifikacija fotokatalitskih procesov modelno podprto načrtovanje true false false Angleški jezik Slovenski jezik Neznano 2026-05-20 15:32:28 2026-05-20 15:43:37 2026-05-21 04:57:18 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 README.txt README.txt README 1 60E907F59A09083B04F5C6C8EB21E91F 3d59920a08adbcc390db585a1d0caf123897990fe046367473f0b01160edab06 81e8787e-5485-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234157 Data.xlsx Data.xlsx Data 1 EF2E52C60073FA6B7107083F8923C2B7 ad1cdf9a9049cd25b2fcbf7971d3e29b92347d38bfdfbd9fd8a6ee17c4a81473 78df8b65-5451-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234151 Fakulteta za kemijo in kemijsko tehnologijo Meritve in testi 0 0 0