Palygorskite–TiO₂ nanocatalysts for photocatalytic degradation of tebuconazole in water

Abstract

Abstract Palygorskite–TiO 2 nanoparticles are frequently used as nanocatalysts. In the present study, two different nanocatalysts were developed based on the use of different palygorskite–TiO 2 ratios: 40–60 and 10–90. The nanocomposites were investigated for the photocatalytic degradation of the common fungicide tebuconazole (TEB), under aquatic conditions. The samples were extensively characterized by X‐ray powder diffraction, attenuated total reflectance–Fourier transform infrared spectroscopy, scanning electron microscopy and N 2 specific surface area (SSA) by Brunauer–Emmett–Teller (BET) analytical techniques. The TiO 2 nanoparticles were successfully dispersed on the mineral's surfaces and the photocatalytic activity reached 88.4% for the palygorskite–TiO 2 ratio of 40:60, where the dispersion was better as proved by the total pore volume and BET parameters (0.49 cm 3 /g and 258 m 2 /g compared to 0.33 cm 3 /g and 220 m 2 /g of the 10:90 ratio). The photocatalytic efficiency of the proposed materials was significantly higher than Degussa P25 (33.2%), and that makes the palygorskite–TiO 2 nanocomposites very promising for advanced application in fungicides' degradation in aquatic environments.