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Titanyl sulfate (TiOSO 4 ) extracted with sulfuric acid from the mineral ilmenite (FeTiO 3 ), which has a high content of titanium (32.2wt.%) was study as acid solid catalyst for the oleic acid esterification. The maximum extraction of Ti was 98wt.%. As reference catalysts sulfated titania (SO42-–TiO2) and titania (TiO 2 ) were synthesized by sol–gel route using as starting...
TiO 2 –ZnO mixed oxides (1.0, 3.0, 5.0 and 10.0wt.% Zn) photoconductors were prepared by the sol–gel method and used for the H 2 production from water splitting. The solids were characterized by nitrogen physisorption, XRD, RAMAN, EDS, UV–Vis and XPS spectroscopy. High specific surface areas (85–159m 2 /g) were obtained in all the mixed oxides compared to the bare TiO 2...
Acids solids sulfonated carbons Starbons-300 were prepared by using a mixture of ClSO 3 H/H 2 SO 4 and H 2 SO 4 (98%) as sulfonating agents. Depending on the sulfonation method used important effects were found on the acidity, textural properties and activity. SO 3 H groups linked to the Starbons-300 surface were observed by FTIR photoacustic spectroscopy...
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