Custers, K.

Gobechiya, E.

Kerkhofs, S.

Kirschhock, C.E.A.

Martens, J.A.

Meledina, Maria

Sree, S.P.

Turner, Stuart

Van Tendeloo, Gustaaf

Wee, L.H.

Abstract: Nanoscale TiO2 photocatalysts are widely used for biomedical applications, self-cleaning processes and wastewater treatments. The impregnation/deposition of TiO2 nanoparticles is indispensable for facile handling and separation as well as the improvement of their photocatalytic performance. In the present study, ordered mesoporous COK-12 silica thin platelets with a high-aspect-ratio and rough surfaces are demonstrated as a potential nanoporous support for homogeneous TiO2 nanoparticle coatings with high loading up to 16.7 wt%. The photocatalytic composite of COK-12 platelets and TiO2 nanoparticles is characterized in detail by HRSEM, SAXS, XRD, N2 physisorption analysis, solid-state UV-vis spectroscopy, HAADF-STEM, EDX analysis, and electron tomography. HAADF-STEM-EDX and electron tomography studies reveal a homogeneous dispersion of nanosized TiO2 nanoparticles over COK-12 platelets. The final composite material with anatase TiO2 nanoparticles that demonstrate a blueshifted semiconductor band gap energy of 3.2 eV coated on a highly porous COK-12 support shows exceptional photocatalytic catalytic activity for photodegradation of organic dyes (rhodamine 6G and methylene blue) and an organic pollutant (1-adamantanol) under UV light radiation, outperforming the commercial P25 TiO2 (Degussa) catalyst

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Anatase <tex>TiO_{2}$</tex> nanoparticle coating on porous COK-12 platelets as highly active and reusable photocatalysts

Anatase <tex>TiO_{2}$</tex> nanoparticle coating on porous COK-12 platelets as highly active and reusable photocatalysts

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Institutional Repository Universiteit Antwerpen