Yellowish nitrogen-doped titania was produced through sol-gel method in mild condition, with the elemental nitrogen derived from aqua ammonia. The titania catalysts were characterized using XRD, BET, TEM, XPS, and UV-Vis diffuse reflectance spectrophotometer, and their photocatalytic activities were evaluated under UV and visible light, respectively. The XRD results showed that all titania catalysts were anatase. More significantly, the crystallite size of nitrogen-doped titania increased with an increase in N/Ti proportion, and the doping of nitrogen could extend the absorption shoulder into the visible-light region, thus it possessed a higher visible-light activity illustrated by decolorization of methyl orange (65.3%) under the irradiation of visible light, whereas pure titania showed little of such kind of visible light activity.The UV-light activity of nitrogen-doped titania catalysts was worse than that of pure titania and Degussa P25. In the range of N/Ti proportion of 4-10 mol%, the activity of nitrogen-doped titania weakened appreciably in the visible-light region as the N/Ti proportion increased, whereas a reverse relationship existed under the irradiation of UV light.
参考文献
| [1] | Vinodgopal K;Kamat PV .Enhanced rates of photocatalytic degradation of an azo dye using SnO2/TiO2 coupled semiconductor thin films[J].Environmental Science and Technology,1995,29:841. |
| [2] | YU Jiaguo.TiO2 thin film photocatalyst[J].稀有金属（英文版）,2004(04):289-295. |
| [3] | XIE Yibing,YUAN Chunwei.Rare earth ion modified TiO2 sols for photocatalysis application under visible light excitation[J].稀有金属(英文版),2004(01):20-26. |
| [4] | 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,1994,98:13669. |
| [5] | Sato S .Photocatalytic of NOx-doped TiO2 in the visible light region[J].Chemical Physics Letters,1986,123:126. |
| [6] | Asahi R;Morikawa T;Ohwaki T;Aoki K,Taga Y .Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293:269. |
| [7] | Ihara T;Miyoshi M;Iriyama Y;Matsumoto O,Sugihara S .Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and nitrogen doping[J].Applied Catalysis B:Environmental,2003,42:403. |
| [8] | Salthivel S;Kisch H .Photocatalytic and photoelectrochemical properties of nitrogen-doped titanium dioxide[J].ChemPhysChem:A European Journal of Chemical Physics and Physical Chemistry,2003,4:487. |
| [9] | Yin S;Yamaki H;Komatsu M;Zhang Q.W,Wang J.S,Tang Q Saito F,Sato T .Preparation of nitrogen-doped titania with high visible light induced photocatalytic activity by mechanochemical reaction of titania and hexamethylenetetramine[J].Journal of Materials Chemistry,2003,13:2996. |
| [10] | Shu Y;Yamaki H;Zhang QW;Komatsu M;Wang JS;Qing T;Saito F;Sato T .Mechanochemical synthesis of nitrogen-doped titania and its visible light induced NOx destruction ability[J].Solid state ionics,2004(1/4):205-209. |
| [11] | Wang J S;Yin S;Komatsu M;Zhang Q.W,Saito F,Sato T .Photo-oxidation properties of nitrogen doped SrTiO3 made by mechanical activation[J].Applied Catalysis B:Environmental,2004,52:11. |
| [12] | Lindgren T;Mwabora J M;Avendano E;Jonsson J Hoel A,Granqvist C.-G Lindquist S.-E .Photoelectrochemical and optical properties of nitrogen doped titanium dioxide films prepared by reactive DC magnetron sputtering[J].Journal of Physical Chemistry B,2003,107:5709. |
| [13] | 陈崧哲,张彭义,祝万鹏,庄大明.反应磁控溅射法制备的氮掺杂TiO2光催化膜的氮化学态和光催化活性[J].催化学报,2004(07):515-517. |
| [14] | Irie H;Watanabe Y;Hashimoto K .Nitrogen-concentration dependence on photocatalytic activity of TiO2-xNx powders[J].Journal of Physical Chemistry B,2003,107:5483. |
| [15] | Diwald O;Thompson T L;Zubkov T;Goralski Ed.G,Walck S.D,Tates J.T .Photochemical activity of nitrogen-doped rutile TiO2 (110) in visible light[J].Journal of Physical Chemistry B,2004,108:6004. |
| [16] | Burda C;Lou Y B;Chen X B;Samia A.C.S,Stout J,Gole J.L .Enhanced nitrogen doping in TiO2nanoparticles[J].Nano Letters,2003,3:1049. |
| [17] | Aita Y;Komatsu M;Yin S;Sato T .Phase-compositional control and visible light photocatalytic activity of nitrogen-doped titania via solvothermal process[J].International Journal of Quantum Chemistry,2004(9):3235-3238. |
| [18] | Sano T.;Negishi N.;Koike K.;Takeuchi K.;Matsuzawa S. .Preparation of a visible light-responsive photocatalyst from a complex of Ti4+ with a nitrogen-containing ligand[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2004(3):380-384. |
| [19] | Christian L;Kunt H;Horst K;Macyk W,Maier W.F .Visible light photodegradation of 4-chlorophenol with a coke-containing titanium dioxide photocatlyst[J].Applied Catalysis B:Environmental,2001,32:215. |
| [20] | Gregg S L;Sing K S W.Adsorption,Surface Area and Porosity[M].London,UK:Academic Press,1982 |
| [21] | Yu JG.;Yu JC.;Leung MKP.;Ho WK.;Cheng B.;Zhao XJ.;Zhao JC. .Effects of acidic and basic hydrolysis catalysts on the photocatalytic activity and microstructures of bimodal mesoporous titania[J].Journal of Catalysis,2003(1):69-78. |
| [22] | Yu JG.;Yu JC.;Cheng B.;Hark SK.;Iu K. .The effect of F--doping and temperature on the structural and textural evolution of mesoporous TiO2 powders[J].International Journal of Quantum Chemistry,2003(2):372-380. |
| [23] | Yu J C;Yu J G;Ho W K;Zhang L.Z .Preparation of highly photocatalytic active nano-sized TiO2particles via ultrasonic irradiation[J].Chemistry Communications,2001,19:1942. |
| [24] | Shin C H;Bugli G;Mariadssou G D .Preparation and characterization of titanium oxynitrides with high specific surface areas[J].Journal of Solid State Chemistry,1991,95:145. |
| [25] | Linsebiger A L;Lu G Q;Tatas Jr J T .Photocatalysis:fundamentals and application to the removal of various types of aqueous pollutants[J].Chemical Reviews,1995,95:735. |
| [26] | Li F B;Li X Z;Hou M F .Photocatalytic degradation of 2-mercaptobenzothiazole in aqueous La3+-TiO2 suspension for odor control[J].Applied Catalysis B:Environmental,2004,48:185. |
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