金属酞菁/TiO_2的制备及脱硫性能研究
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摘要
以钛酸丁酯和酞菁配合物为原料,采用溶剂热法制备金属酞菁/TiO_2(MPc/TiO_2)脱硫催化剂。利用XRD、FTIR、PL、SEM以及XPS等进行表征,研究催化剂对燃油中噻吩类含硫化合物的脱除性能。结果表明,MPc/TiO_2中TiO_2结晶度好,具有片层状结构,酞菁配合物分子与半导体形成穿插结构,共同促进晶体的生长,在紫外光下照射3 h,ZnPc-TiO_2的脱硫率最高可达98.54%。
Phthalocyanine complex-TiO_2 composite catalyst was prepared by hydrothermal method using butyltitanate as raw material.The photocatalysts of MPc/TiO_2 was investigated by XRD,FTIR,PL,SEM and XPS.The result shows that the crystallinity of MPc/TiO_2 prepared by hydrothermal method is improved when TiO_2 were sensitized by the phthalocyanine complex,there is a strong interaction between phthalocyanine molecules and TiO_2 MPc/TiO_2 catalysts.Test of photocatalytic oxidation of thiophene shows that the degradation rate of MPc-TiO_2 was up to 98.54% after 3 h irradiation under ultraviolet light.
Phthalocyanine complex-TiO_2 composite catalyst was prepared by hydrothermal method using butyltitanate as raw material.The photocatalysts of MPc/TiO_2 was investigated by XRD,FTIR,PL,SEM and XPS.The result shows that the crystallinity of MPc/TiO_2 prepared by hydrothermal method is improved when TiO_2 were sensitized by the phthalocyanine complex,there is a strong interaction between phthalocyanine molecules and TiO_2 MPc/TiO_2 catalysts.Test of photocatalytic oxidation of thiophene shows that the degradation rate of MPc-TiO_2 was up to 98.54% after 3 h irradiation under ultraviolet light.
引文
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[3] Bae E,Choi W.Highly enhanced photoreductive degradation of perchlorinated compounds on dye-sensitized metal/TiO2 under visible light[J].Environmental Science & Technology,2003,37(1):147-152.
[4] 陈彩凤,陈志刚,陈雪梅,等.纳米粉体的制备技术[J].江苏理工大学学报,2000,21(6):98-102.
[5] Chen L C,Chou T C.Kinetics of photodecolorization of methyl orange using titanium dioxide as catalyst[J].Industrial & Engineering Chemistry Research,1993,32(7):1520-1527.
[6] Kang M G,Han H E,Kim K J.Enhanced photodecomposition of 4-chlorophenol in aqueous solution by deposition of CdS on TiO2[J].Journal of Photochemistry & Photobiology A Chemistry,1999,125(1/2/3):119-125.
[7] Wang C,Shang H,Tao Y,et al.Properties and morphology of CdS compounded TiO2,visible-light photocatalytic nanofilms coated on glass surface[J].Separation & Purification Technology,2003,32(1):357-362.
[8] Somasundaram S,Chenthamarakshan C R,Tacconi N R D,et al.Composite WO3-TiO2 films:Pulsed electrodeposition from a mixed bath versus sequential deposition from twin baths[J].Electrochemistry Communications,2006,8(4):539-543.
[9] Vinodgopal K,Kamat P V.Enhanced rates of photocatalytic degradation of an azo dye using SnO2/TiO2 coupled semiconductor thin films[J].Environmental Science & Technology,1995,29(3):841-845.
[10] Choi W,Termin A,Hoffmann M R.The role of metal ion dopants in quantum-sized TiO2:Correlation between photoreactivity and charge carrier recombination dynamics[J].Journal of Physical Chemistry,1994,98(51):13669-13679.
[11] Asahi R,Morikawa T,Ohwaki T,et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293(5528):269-271.
[12] Chen Y,He N,Doyle J J,et al.Enhancement of optical limiting response by embedding gallium phthalocyanine into polymer host[J].Journal of Photochemistry & Photobiology A Chemistry,2007,189(2):414-417.
[13] De T G,Vázquez P,Agullólópez F,et al.Role of structural factors in the nonlinear optical properties of phthalocyanines and related compounds[J].Cheminform,2004,104(9):3723-3750.
[14] Sanusi K,Stone J M,Nyokong T.Nonlinear optical behaviour of indium-phthalocyaninetethered to magnetite or silica nanoparticles[J].New Journal of Chemistry,2015,39(3):1665-1677.
[15] Sanusi K,Nyokong T.Effects of pyrene on the photophysical and two-photon absorption-based nonlinear optical properties of indium(III) phthalocy-anines[J].Journal of Coordination Chemistry,2014,67(17):2911-2924.
[16] Hurum D C,Gray K A,Rajh T,et al.Recombination pathways in the degussa P25 formulation of TiO2:Wavelength-sensitive decomposition[J].Pirys Chem B,2004,108:977-980.
[17] Agrios A G,Gray K A,Weitz E.Narrow-band irradiation of a homologous series of chlorophenols on TiO2:charge-transfer complex formation and reactivity[J].Langmuir the Acs Journal of Surfaces & Colloids,2004,20(14):5911-5917.
[18] He C,Dong S,Su M H,et al.Photocatalytic activity of metal (Pt,Ag,and Cu)-deposited TiO2 photoelectrodes for degradation of organic pollutants in aqueous solution[J].Desalination,2010,253(1/2/3):88-93.
[19] Yao Z,Jia F,Jiang Y,et al.Photocatalytic reduction of potassium chromate by Zn-doped TiO2/Ti film catalyst[J].Applied Surface Science,2010,256(6):1793-1797.
[20] Yuan B,Wang Y,Bian H,et al.Nitrogen doped TiO2,nanotube arrays with high photoelectrochemical activity for photocatalytic applications[J].Applied Surface Science,2013,280(9):523-529.