Digital light processing of SiO2-TiO2 materials by combining ceramic slurries and metal precursors

Le résumé fourni par la source

One-step additive manufacturing of functional ceramics via Digital Light Processing (DLP) is still under development. The increased demand of such kind of materials creates new opportunities to investigate alternatives and new methodologies. In this work, a combination of photocurable SiO 2 slurries with Ti metal precursor (titanium isopropoxide, TIPO) is used to fabricate SiO 2 -TiO 2 materials by DLP. Slurries with different solids content and metal precursor concentration were prepared. The obtained materials were characterized and evaluated as photocatalysts. The anatase-TiO 2 phase was retained at temperatures as high as 1200 ºC in all cases, although for higher concentrations the rutile phase was also detected at such temperature. From the methylene blue degradation experiments it can be extracted that the SiO 2 surface was fully covered when a 10 wt% of metal precursor was added, and the highest photocatalytic activity was obtained for the samples with 10-20 wt% of TIPO sintered at 1000-1100 ºC/1 h.

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