A facile synthesis for uniform tablet like TiO2/C derived from Materials of Institut Lavoisier 125(Ti) (MIL 125(Ti) and their enhanced visible light driven photodegradation of tetracycline.
The uniform tablet like TiO2/C nanocomposites with two crystal types (rutile and anatase) and large specific surface area (438 m2 g 1) were successfully prepared by Materials of Institut Lavoisier 125(Ti) (MIL 125(Ti) calcined at a suitable temperature and applied for photocatalytic tetracycline (TC) The nanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR) X ray diffraction (XRD) transmission electron microscopy (TEM) scanning electron microscopy (SEM) and mapping, N2 adsorption desorption isotherms, photoluminescence spectra (PL) photocurrent, and X ray photoelectron spectroscopy (XPS) The changes of physicochemical parameters are discussed in detail. It is found that nanocomposite through suitable calcination temperature (M A 800) with large surface area and appropriate micropore/mesopore ratio could strengthen separation and migration rates of photo generated charge, resulting in the improvement of visible light photocatalytic activity of tetracycline, and exhibited about 2.0 times quicker than that of MIL 125(Ti) In addition, M A 800 displayed favourable reusability and stability in four circulation tests. Finally, the reaction mechanism of photocatalyst and photodegradation pathway of tetracycline was also proposed. O2 was the most important active species, and dehydroxylation and decarboxylation were the main photodegradation pathway of tetracycline.
Journal of colloid and interface science