Synthesis and characterization of novel nanocomposite, anatase sandwich type polyoxometalate, as a reusable and green nano catalyst in oxidation desulfurization of simulated gas oil

摘要

(Bu_4N)_7H_3[P_2W_(18)Cd_4(Br)_2O_(68)]-TiO_2 nanocomposite have been synthesized first by reaction of A-β-Na_8HPW_9O_34 with cadmium nitrate and next condensation with titanium tetraisopropoxide at 100°C via sol-gel method under oil-bath condition. The materials characterized by ~(113)Cd NMR,~(31)P NMR, XRD. TEM and UV-vis techniques. The crushed nano leaf of anatase phase is 20 nm in nature and fixing of (Bu_4N)_7H_3[P_2W_(18)Cd_4(Br)_2O_(68)] decreases its size. As seen in TEM image, the nano particles of (Bu_4N)_7H_3[P_2W_(18)Cd_4(Br)_2O_(68)]-TiO_2 are small with a size of about 10 nm. This anatase nanocomposite polyoxometalate was shown be able to oxidative desulfurization of simulated gas oil with high yield.