Several kinds of Tungstophosphates of Heteropoly Compounds (TPHC) with different compositions and the same structure were synthesized using the method of solid-phase reaction to change the mol ratio of Na4P2O7·10H2O, WO3 and Na2WO4·2H2O. TPHC, as a catalyst, was used in oxidative desul- furization of diesel. The results show that TPHC has catalytic activ- ity. With THPC existing, the highest desulfurization rate reaches 51.85%, 32.6% higher than that yield without TPHC. And the desulfurization rate increases with decreasing WO3. FT-IR spectra of TPHC shows that the catalytic activity is related to the activity of end oxygen(Od).The more active Od is, the stronger the capability of obtaining or losing electron is. It means that TPHC has a good cata- lytic activity. FT-IR spectra of TPHC indicates that desulfurization rate is in linear correlation with I W-O d /I P-Oa (I W-Odis intensity of W-Od vibration band, I P-Oais intensity of P-Oa vibration band) and correlation coefficient reaches 0.965.
BIN XiaobeiWANG KaipengCAO HongKUANG ShengluYUAN Jizu
The graphite encapsulatedα-Fe particles were prepared by reduction of stage-2 and stage-3 FeCl 3 graphite intercalation compounds(GICs)with metallic potassium.X-ray diffraction analysis(XRD),energy dispersive X-ray spectroscopy(EDS)investigation and transmission electron microscopy(TEM) observation show that the reduction products of stage-2 FeCl 3 -GICs contains more abundantα-Fe nanoparticles than those of stage-3.High-resolution TEM(HRTEM)observation reveals that the nanoparticle ofα-Fe was polycrystals or twins,which was real or quasi two-dimension in shape,and whose space orientation was strictly controlled by the graphene.Based on the experiment results,a possible growth model of the graphite encapsulatedα-Fe was proposed.
