Preparation of High-Porosity B-TiO/CN Composite Materials: Adsorption-Degradation Capacity and Photo-Regeneration Properties.

Adsorption can quickly remove pollutants in water, while photocatalysis can effectively decompose organic matter. B-TiO/g-CN ternary composite photocatalytic materials were prepared by molten method, and their adsorption-degradation capability under visible light conditions was discussed. The morphology of the B-TiO/g-CN materials was inspected by SEM, TEM, BET, and EDS, and the results showed that close interfacial connections between TiO and g-CN, which are favorable for charge transfer between these two semiconductors, formed heterojunctions with suitable band structure which was contributed by the molten BO. Meanwhile, the molten BO effectively increased the specific surface area of TiO/CN materials, thereby increasing the active sites and reducing the recombination of photogenerated electron-hole pairs and improving the photocatalytic degradation abilities of TiO and g-CN. Elsewhere, the crystal structure analysis (XRD, XPS, FTIR) results indicated that the polar -B=O bond formed a new structure with TiO and g-CN, which is not only beneficial for inhibiting the recombination of electron holes but also improving the photocatalytic activity. By removal experiment, the adsorption and degradation performances of B-TiO/g-CN composite material were found to be 8.5 times and 3.4 times higher than that of g-CN. Above all, this study prepared a material for removing water pollutants with high efficiency and provides theoretical support and experimental basis for the research on the synergistic removal of pollutants by adsorption and photocatalysis.