Low loading of TiO 2 on the zeolite ZSM-5 produced a photocatalyst of high efficiency, especially with efficient light harvesting. 7 Comparison of 90°pulse 29 Si NMR spectra with 1 H-29 Si CP-MAS spectra allows measurement of -OH displaced from the zeolite surface by Si-O-Ti chemisorption. The coverage by 2.5 wt % TiO 2 is 16-18% of the BET surface area. A theoretical monolayer of anatase TiO 2 loaded to 2.5 wt % is calculated to cover 10%-20% of the BET surface, depending upon the orientation of the anatase unit cell. Loading TiO 2 above 2.5 wt % leads to further growth of the titania phase without further -OH displacement and increase of the coverage of the surface. Energy filtered TEM shows that TiO 2 growth occurs at irregularities on the ZSM-5 surface.
Table 1. Purification of an alcohol dehydrogenase from sporotrichum pulverulentum Total Specific protein Total activity Yield Step old units (units/mg)
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