Photoinduced Hydroxyl Radicals and Photocatalytic Performance of Nd2O3/TiO2 Photocatalysts

doi:10.7517/j.issn.1674-0475.2006.03.197

Abstract

Abstract: Nd₂O₃/TiO₂ photocatalysts were prepared by sol-gel method using neodymium nitrate and tetrabutyl titanate as precursors,and characterized by means of XRD and BET.After the doped with Nd₂O₃,the particle diameter of catalyst was decreased,the specific surface area was increased,the formation rate of hydroxyl radical on the catalyst was increased,and the catalytic activity was improved.Using methyl orange as the model compound of the photocatalytic degradation reaction,the activity of the prepared photocatalysts was investigated in suspension irradiated by high-pressure mercury lamp;and the hydroxyl radical produced in the supernatant of the irradiated catalyst suspension containing terephthalic acid were also investigated by measuring the fluorescence derived by the reaction with terephthalic acid.As a result,the addition of Nd₂O₃ to TiO₂ notably enhanced its photocatalytic activity.The adsorption constants of methyl orange on the Nd₂O₃ doped catalysts and the nonmodified TiO₂ catalyst were evaluated,and the result showed the adsorption of methyl orange on the Nd₂O₃/TiO₂ catalysts was improved.The optimum loading amount of Nd ion is 1.0%(molar ratio).

Key words: photocatalysis, TiO₂, Nd₂O₃, hydroxyl radicals, methyl orange

CLC Number:

O643

LI Hui-quan, CHEN Wei-fan, CUI Yu-min. Photoinduced Hydroxyl Radicals and Photocatalytic Performance of Nd₂O₃/TiO₂ Photocatalysts[J]. Imaging Science and Photochemistry, 2006, 24(3): 197-203.

References

[1] Fujishima A,Rao T N,TrykDA.Titanium dioxide photocatalysis[J].J.Photochem.Photobiol.C,2000,1(1):1-21.
[2] Andreozzi R,Caprio V,Insola A.Advanced oxidation processes (AOP) for water purification and recovery[J].Catal.Today,1999,53 (1):51-59.
[3] 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].J.Phys.Chem.,1994,98(51):13669-13679.
[4] Iwasaki M,Hara M,Kawada H,et al.Cobalt ion-doped TiO₂ photocatalyst response to visible light[J].J.Colloid Interface Sci.,2000,224(1):202-204.
[5] Barreto J C,Smith G S,Strobel N H P,et al.Terephthalic acid:a dosimeter for the detection of hydroxyl radicals in vitro[J].Life Sci.,1995,56 (4):89-96.
[6] Hirakawa T,Nosaka Y.Properties of O2· and · OH formed in TiO₂ aqueous suspensions by photocatalytic reaction and influence of H2O2 and some ions[J].Langmuir,2002,18(8):3247-3254.
[7] 李慧泉,李越湘,周新木,等.Sm2O₃掺杂TiO₂光催化剂的制备和性能[J].催化学报,2004,25(10):814-818.Li H Q,Li Y X,Zhou X M,et al.Preparation and properties of Sm2O₃ doping TiO₂ photocatalyst[J].Chin.J.Catal.,2004,25 (10):814-818.
[8] 李慧泉,李越湘,周新木,等.La₂O₃掺杂TiO₂光催化剂的制备和性能[J].分子催化,2004,18(4):304-309.Li H Q,Li Y X,Zhou X M,et al.Preparation and properties of La₂O₃ doping TiO₂ photocatalyst[J].J.Mol.Catal.,2004,18(4):304-309.
[9] Ishibashi K,Fujishima A,Watanabe T,et al.Detection of active oxidative species in TiO₂ photocatalysis using the fluorescence technique[J].Electrochem.Commun.,2000,2 (3):207-210.
[10] Damme H V,Hall W K.Photoassisted decomposition of water at the gas-solid interface on titanium dioxide[J].J.Am.Chem.Soc.,1979,101(15):4373-4374.
[11] Schwarz P F,Turro N J,Bossmann S H,et al.A new method to determine the generation of hydroxyl radicals in illuminated TiO₂ suspensions[J].J.Phys.Chem.B,1997,101 (36):7127-7134.
[12] Horikoshi S,Hidaka H.Environmental remediation by an integrated microwave/UV-illumination method 1 Microwave-assisted degradation of rhodamine-B dye in aqueous TiO₂ dispersions[J].Enviro.Sci.Technol.,2002,36:1357-1366.
[13] Langmuir I.The adsorption of gases on plane surfaces of glass,mica and platinum[J].J.Am.Chem.Soc.,1918,40(9):1361-1403.
[14] Ranjit K T,Willner I,Bossmann S H,et al.Lanthanide oxide doped titanium dioxide photocatalysts:effective photocatalysts for the enhanced degradation of salicylic acid and t-cinnamic acid[J].J.Catal.,2001,204 (2):305 -313.
[15] 李越湘,吕功煊,李树本,等.光催化降解污染物制氢反应与原红外表征[J].物理化学学报,2003,19(4):329-333.Li Y X,Lü G X,Li S B,et al.Photocatalytic production of hydrogen with degrading pollutants and characterization by in situ Infrared spectroscopy[J].Acta Phys-Chim.Sin.,2003,19(4):329-333.

Photoinduced Hydroxyl Radicals and Photocatalytic Performance of Nd₂O₃/TiO₂ Photocatalysts

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