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• W1984943353 abstract "Abstract A simple and reliable procedure to prepare TiO 2 and Au/TiO 2 samples with high photocatalytic activity for hydrogen generation from water/methanol mixtures is reported, which uses natural alginate as the templating agent. Aqueous solutions of sodium alginate are flocculated as beads by TiO 2+ ions in the presence or absence of AuCl 4 − . The resulting alginate beads containing approximately 25 wt % of Ti and various Au contents are dehydrated by ethanol washings before drying under supercritical CO 2 conditions. The key step in the preparation method is to obtain Au/Ti‐containing alginate aerogels of approximately 700 m 2 g −1 Brunauer–Emmett–Teller surface area. The surface area of the TiO 2 and Au/TiO 2 samples obtained after calcination of the organic biopolymer at 450 °C under air ranges from 187 to 136 m 2 g −1 , and the Au content has been varied from 1.3 to 0.05 wt % to optimize the photocatalytic activity of the samples. TiO 2 forms in the anatase phase according to XRD and Raman spectroscopy. The highest activity Au/TiO 2 sample (containing 0.556 wt % of Au) prepared by means of the biopolymer templating method was approximately eight times more active for hydrogen generation using a solar simulator than was an analogous Au‐containing TiO 2 P25 sample prepared by means of the conventional deposition–precipitation method." @default.
• W1984943353 created "2016-06-24" @default.
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• W1984943353 date "2012-10-10" @default.
• W1984943353 modified "2023-10-17" @default.
• W1984943353 title "Alginate as Template in the Preparation of Active Titania Photocatalysts" @default.
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• W1984943353 doi "https://doi.org/10.1002/cctc.201200386" @default.
• W1984943353 hasPublicationYear "2012" @default.
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