Citation:
MA Qing, TONG Jin-Hui, SU Ling-Di, WANG Wen-Hui, MA Wen-Mei, BO Li-Li. Highly Selective Hydroxylation of Benzene Catalyzed by Hybrids of Polyoxometalate/Ionic Liquid[J]. Acta Physico-Chimica Sinica,
;2016, 32(12): 2961-2967.
doi:
10.3866/PKU.WHXB201609181
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Aseriesof hybridmaterials ([C4mim]3+xPMo12-xVxO40, x=0, 1, 2)basedonV-substitutedphosphomolybdic acidH3+xPMo12-xVxO40 (x=0, 1, 2) and ionic liquid 1-butyl-3-methyl imidazolium bromide ([C4mim]Br) have been prepared by an anion-exchange method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrophotometry (FT-IR) and UV-Vis diffuse reflectance spectra (UV-Vis DRS) analysis. The catalytic performances of the samples were tested in oxidation of benzene to produce phenol using H2O2 as the oxidant. The results showed that the hybrids[C4mim]3+xPMo12-xVxO40 exhibit much higher catalytic properties than both the corresponding moieties. In particular, under the optimized conditions, 21% of benzene conversion and 99%selectivity for phenol have been obtained with[C4mim]5PMo10V2O40. The sample also exhibits good reusability and was reused five times without a significant decrease in conversion and selectivity.
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