Abstract
TiO2/C composites have been developed from polysaccharide-Ti4+ complex to photodegrade methylene blue (MB) but with low BET surface area. The present study aimed to obtain TiO2/C composite materials with improved BET surface area by Ti4+-coordination crosslinked Pickering emulsion gel. FT-IR, UV–vis, XRD, XPS, UV–vis DRS, TG-DTA, PEC, N2 adsorption-desorption, SEM-EDS, and TEM were used to characterize the morphology and structure of the as-prepared composite materials. The composites showed enhanced BET surface area with uniform particle size, in which the TiO2 was distributed uniformly. Carbon is mainly present on the surface, which facilitates the separation of charge carriers. The photodegradation properties of the obtained composite materials were investigated. TiO2/C composite prepared at 500 °C has excellent adsorption and photodegradation performance, and 98.91 % of MB was removed within 40 min. In addition, the composite material has good cycling stability. Overall, a simple and efficient method for TiO2/C preparation was proposed, which can be promoted to other polysaccharides.
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