To this end, we pre-modify commercial TiO 2 P-25 nanoparticles (Sigma Aldrich, Aeroxide) with Pt and Au nanoparticles (M-TiO 2 ), using established protocols from literature, prior to their attachment to the SiO 2 microparticle supports via the polymer bridge. Specifically, we functionalise TiO 2 P-25 with pre-synthesised Pt nanoparticles via solvent evaporation of the dispersed nanoparticles in MeOH, following the protocol found in, while Au nanoparticles are directly grown onto the TiO 2 nanoparticles from solution under water reflux conditions, as outlined in. By using two different, but well-established approaches to co-catalyst modification of a photocatalyst (solvent evaporation and deposition-precipitation respectively), we aim to demonstrate the broad applicability of our approach to the support of functional photocatalysts.