In-situ coupling TiO2(B) and ZIF-8 with enhanced photocatalytic activity via effective deficient

In recent years, photocatalytic degradation on inorganic semiconductors has been attracting widespread attention. However, for a single semiconductor, the speed of recombination of electrons and holes is fast, which leads to a decrease in the absorption of sunlight, thereby affecting its photocatalytic efficiency. Therefore, coupling of semiconductor and metal-organic framework is of great significance due to its porosity and large specific surface area. Here, a composite photocatalyst was obtained by coupling ZIF-8 and TiO2(B) via a simple method. By XRD, FT-IR, SEM, TEM, UV-visible diffuse reflectance spectroscopy, XPS, EPR and EDS were used to study the prepared samples. Photocatalytic degradation experiments confirmed that the composites have significantly improved photodegradation effect due to the increased light utilization and fast charge carriers transfer. Moreover, the possible mechanism was also proposed. This work provided the view on combination of semiconductor and metal-organic framework coupling to enhance photocatalytic performance.