Supplementary material: Influence of TiO2 agglomerate and aggregate sizes on photocatalytic activity

Figure 1: Measured spectra in the range of 600 - 300 nm of the used light source (Philips 40W UEO Performance) for the photocatalytic experiments. Light intensities were measured separately for every reactor.

Figure 2: Formation of HCHO in the presence of the diluted (left) and freeze dried (right) catalyst suspension (1 g L-1) out of a 30 mM MeOH solution. Illuminatiuon was performed with a Philips 40W UEO Performance lamp.

Figure 3: TEM images of freeze dried suspensions. 0.5 h (top, left), 4 h (top right),

96 h (bottom, left), XXS100 (bottom right).

Figure 4: Rheological properties of the used suspensions.

Figure 5: Agglomerated particle size distribution of the used suspensions measured with DLS.