The Phthalocyanine Complex-tio <sub> 2 </ Sub> / Sno <sub> 2 </ Sub> Composites And Desulfurization Performance Research,

Metal phthalocyanine has been given more and more attention in the field of photo catalysis because of the stable chemical properties and the excellent optical properties.The photochemical oxidation technology of dye-sensitized semiconductor is a promising way for deep oxidative desulfurization. In this paper, a facile developed 'sol-gel hydrothermal" technique was used to synthesize metal phthalocyanine (MPc)-semiconductor (TiO2or SnO2) catalysts for photodegradation of thiophene. The photocatalytic properties were evaluated by the degradation of thiophene in the UV and visible light irradiation conditions.The main work in this paper is as follows:1. The metal phthalocyanine (MPc) and four carboxyl substituted metal phthalocyanine (MPcTc)(M=Mn(Ⅱ), Fe(Ⅱ),Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ))have been synthesized by the method of solid phase and characterized by elemental analysis, infrared spectroscopy and ultraviolet spectroscopy.2. The composites of dye-sensitized TiO2have been synthesized by the method of sol-gel hydrothermal technique and characterized by IR, XRD spectra, SEM, XPS and fluorescence spectroscopy. The composites were two types of the MPc-TiO2catalyst and MPcTc-TiO2catalyst, which M=Mn(Ⅱ),Fe(Ⅱ),Co(Ⅱ),Ni(Ⅱ), Cu(Ⅱ),Zn(Ⅱ). The characteristic absorption peaks changing of the infrared absorption spectrum, fluorescence quenching phenomenon of the fluorescence spectroscopy and larger changes for major element binding energy of photo electron spectroscopy show the presence of strong chemical bonds in the composites.3. The composites of dye-sensitized SnO2have been synthesized by the method of sol-gel hydrothermal technique and characterized by Infrared spectroscopy(IR), Scanning electron microscopy(SEM), X-ray diffraction(XRD), X-ray Photoelectron spectroscopy(XPS) and fluorescence spectroscopy. The composites were two types of the MPc-SnO2catalyst and MPcTc-SnO2catalyst, which M=Mn(Ⅱ),Fe(Ⅱ), Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ). The characteristic absorption peaks changing of the infrared absorption spectrum, fluorescence quenching phenomenon of the fluorescence spectroscopy and larger changes for major element binding energy of photoelectron spectroscopy show the presence of strong chemical bonds in the composites.4. The photocatalytic properties of phthalocyanines-TiO2were tested by the degradation effects of thiophene under the UV and visible light irradiation conditions. Studied the main factors of the photocatalytic degradation, the best condition for the photocatalytic degradation is as follows:catalysts are0.10g·100L-1and air flow rate of100mL·min-1. The results indicate that the catalysts are effective for the degradation ofthiophene in the fuel under the conditions of the drum air.5. The photocatalytic properties of phthalocyanines-SnO2were tested under the same condition. The results showed that the photocatalytic properties of TiO2to be significantly higher than that of SnO2. After UV irradiation180min, photocatalytic effect of phthalocyanine sensitized semiconductor composite are higher than that of pure semiconductor catalyst. The carboxyl substituted phthalocyanine complexes sensitized semiconductor composite have better photocatalytic effect at300w tungsten lamp irradiation90min regardless of the semiconductor TiO2or of SnO2. The kinetic equation was simulated in term of the analysis of experimental results. The process of all photocatalytic reaction conformed to the kinetics of first order reaction. The dynamic equation is In (Co/Ct)=Kt+A.