Efficient photocatalysis of CrVI and methylene blue by dispersive palygorskite-loaded zero-valent iron/carbon nitride

摘要: Abstract Our previous study reported that a more dispersed palygorskite (Pal) with multiparous structure can be fabricated from rigid nano-rods by ion beam bombardment. In this study, the new of Pal (MPal) was used to carry nanocomposite prepared graphitic carbon nitride (CN) and nano zero-valent iron (NZVI) following simple thermopolymerisation method for first time. The as-prepared sample (MPal/NZVI/CN) achieved broader light absorption in visible region low recombination, according characterisation results UV–vis diffuse reflectance photoluminescence (PL) spectra photocatalysts. photocatalysis CrVI methylene blue (MB) an aqueous solution MPal/NZVI/CN revealed MPal/NZVI/CN-1:5:6 composites exhibited superior catalytic activity, MB removal efficiencies 98.48% 99.2% 120 min, respectively. Additionally, reaction rate constants (kCr kMB) were much higher than those CN, NZVI/CN, MPal/CN because formation MPal NZVI CN promoted separation photo-generated electron-hole pairs. After four cycles, great photoactivity, which could not only attributed improved dispersion MPal, but also ability electrons reduce FeIII/FeII Fe0. This opens opportunities modifying photocatalysts using inorganic nanomaterials readily formed physical irradiation.