Enhanced adsorption and photocatalysis capability of generally synthesized TiO2-carbon materials hybrids
TiO2@RGO, TiO2@CNTs, and TiO2@C (glucose carbon) hybrid composites exhibiting both excellent adsorption capability and photocatalytic activity having great potential in pollutant removal were synthesized and composition and nanostructure were determined in detail by state-of-the-art methods. These hybrid materials show enhanced visible light absorption and RhB-dye removal capability via adsorption and photocatalysis with their efficiency generally increasing with carbon content. TiO2@C with low carbon concentration promotes photocatalytic performance, while increasing carbon amount improves the adsorption efficiency. Among the three kinds of TiO2-carbon hybrids, TiO2@RGO with optimized RGOcontent (2 wt.%) exhibited the best photocatalytic efficiency, attributed to efficient separation efficiency of injected electron and excited RhB with involving of RGO, while TiO2@C with 32 wt.% C showed the highest adsorption capability due to the most negative zeta potential and highest BET surface areas. This comparison study has revealed how TiO2@carbon material hybrids can be optimized for adsorption and photocatalytic toxin removal.
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