二氧化钛空心微球的制备及在光催化降解有机色素方面的应用
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摘要
采用溶胶-凝胶法将纳米二氧化钛(Ti O2)粒子负载于氨基化的交联聚苯乙烯(PS-DVB)微球表面,得到一种核壳型复合材料,分别经过氮气和空气气氛下煅烧,最终得到一种稳定的二氧化钛空心微球(HTS)结构。用红外光谱仪(FIRT)、扫描电镜(SEM)、X射线粉末衍射仪、比表面积(BET)对中间产物及最终产物进行了表征。结果显示制备的空心微球结构稳定,具有较高的比表面积(约76.5m2/g),是具有高光催化活性的锐钛矿结构。通过光催化降解有机色素红宝石蓝的研究,证明产物在处理工业染料废水方面具有很好的应用前景。
Stable hollow titania microsphere(HTS) was fabricated in a sol–gel process by coating of titania precursor titanium tetrabutoxide(TBOT) onto modified(-NH2)Porous Polystyrene cross-linked divinyl benzene(PS-DVB) microspheres template, followed by calcining in argon nitrogen and then in the air. The intermediate and final products were characterized by Infrared spectroscopy(FIRT), scanning electron microscopy(SEM), X-ray powder diffraction, specific surface area(BET). The resultant stable HTS(diameter 4-5μm) features a high specific surface area(76.5 m2/g), and thus leads to a high photocatalysis. And the experiments photocatalytic degradation of MG was conducted under UV light irradiation, which showed a high photocatalysis ability. It can therefore be potentially applied for the treatment of water contaminated by organic pollutants.
Stable hollow titania microsphere(HTS) was fabricated in a sol–gel process by coating of titania precursor titanium tetrabutoxide(TBOT) onto modified(-NH2)Porous Polystyrene cross-linked divinyl benzene(PS-DVB) microspheres template, followed by calcining in argon nitrogen and then in the air. The intermediate and final products were characterized by Infrared spectroscopy(FIRT), scanning electron microscopy(SEM), X-ray powder diffraction, specific surface area(BET). The resultant stable HTS(diameter 4-5μm) features a high specific surface area(76.5 m2/g), and thus leads to a high photocatalysis. And the experiments photocatalytic degradation of MG was conducted under UV light irradiation, which showed a high photocatalysis ability. It can therefore be potentially applied for the treatment of water contaminated by organic pollutants.
引文
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[2]Q.Zhang,L.Ma,Q.Zhao,et al.Mophology-modulations of Ti O2 nanostructures for enhanced photocatalytic performance[J].Appl.Surf.Sci.,2015,332(3):224-228.
[3]M.Myilsamy,M.Mahalakshmi,V.Murugesan,et al.Enhanced photocatalytic activity of nitrogen and indium co-doped mesoporous Ti O2 nanocomposites for the degradation of 2,4-dinitrophenol under visible light[J].Appl.Surf.Sci.,2015,342(8):1-10.
[4]J.J.Wu,X.J.Lu,L.L.Zhang.Dielectric constant controlled solvothermal synthesis of a Ti O2 photocatalyst with tunable crystallinity:a strategy for solvent selection[J].Eur.J.Inorg.Chem.,2009,86(9):2789-2795.
[5]Y.Mao,S.S.Wong.Size-and shape-dependent transformation of nanosized titanate into analogous anatase titania nanostructures[J].J.Am.Chem.Soc.,2006,128(9):8217-8226.
[6]S.Ding,F.Huang,X.Mou,et al.Mesoporous hollow Ti O2microspheres with enhanced photoluminescence prepared by a smart amino acid template[J].Mater.Chem.,2011,21(6):4888-4892.
[7]Y.Liu,R.C.Che,G.Chen,et al.Radially oriented mesoporous Ti O2 microspheres with singlecrystal–like anatase walls for high-efficiency optoelectronic devices[J].Sci.Adv.,2015,1(4):1445-1450.
[8]W.Zhou,W.Li,J.Q.Wang,et al.Ordered mesoporous black Ti O2 as highly efficient hydrogen evolution photocatalyst[J].J.Am.Chem.Soc.,2014,136(26):9280-9283.
[9]S.H.A.Lee,N.M.Abrams,P.G.Hoertz.Coupling of titania inverse opals to nanocrystalline titania layers in dye-sensitized solar cells[J]J.Phys.Chem.B.,2008,112(46):14415-14421.
[10]U.Jeong,S.H.Im,P.H.C.Camargo.Microscale fish bowls:a new class of latex particles with hollow interiors and engineered porous structures in their surfaces[J].Langmuir,2007,23(22):10968-10975.
[11]F.Caruso,R.A.Caruso,H.Moehwald.Nanoengineering of inorganic and hybrid hollow spheres by colloidal templating[J].Science,1998,282(20):1111-1114.
[12]J.Zhou,M.Chen,X.Qiao.Facile preparation method of Si O2/PS/Ti O2 multilayer core-shell hybrid microspheres[J].Langmuir,2006,22(12):10175-10179.
[13]W.S.Choi,H.Y.Koob,W.T.S.Huck.Synthesis of raspberry-like particles using polyelectrolyte multilayer-coated particles[J].Mater.Chem.,2007,17(47):4943-4946.
[14]M.Steenackers,S.Q.Lud,M.Niedermeier.Structured polymer grafts on diamond[J].J Am Chem Soc.,2007,129(50):15655-15661.
[15]V.L.Covolan,L.H.I.Mei,C.L.Rossi.Chemical modifications on polystyrene latex:preparation and characterization for use in immunological applications[J].Polym.Adv.Technol.,1997,8(3):44-50.
[16]K.S.W.Sing.Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity(Recommendations 1984)[J].
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