采用水热法,以Ti(SO4)2为钛源,KIO3为掺碘剂制备了具有高可见光活性,高稳定性的二氧化钛包裹碘单质(I2/TiO2)光催化剂.利用X射线光电子能谱(XPS)、X射线晶体粉末衍射(XRD)、透射电子显微镜(TEM)和紫外可见漫反射光谱(DRS)等表征手段对样品进行表征.结果表明,I2/TiO2中除含有锐钛矿相二氧化钛外、还含有碘单质和碘酸;I2/TiO2粒径大小为45 nm左右;在波长384 nm至700 nm范围内,该催化剂有强烈的吸收.探讨了该催化剂的形成过程和可见光催化机理.以苯酚降解反应为探针,测定了I2/TiO2光催化活性.结果显示:在全谱光源照射下I2/TiO2活性略高于P25,在可见光范围内其活性是P25的3倍多.确定了降解苯酚的最佳条件:全谱光源照射,投加量为0 5 g/L,苯酚浓度大于10 mg/L,溶液pH为3.2.I2/TiO2重复使用4次后,催化活性没有明显下降.
参考文献
| [1] | Young C;Lim TM;Chiang K;Scott J;Amal R .Photocatalytic oxidation of toluene and trichloroethylene in the gas-phase by metallised (Pt, Ag) titanium dioxide[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(1/2):1-10. |
| [2] | Jianjun Liu;Xinping Li;Shengli Zuo;Yingchun Yu .Preparation and photocatalytic activity of silver and TiO_2 nanoparticles/montmorillonite composites[J].Applied clay science,2007(3/4):275-280. |
| [3] | 柳丽芬,李秀婷,杨凤林,余济美.Ag/TiO2光催化氧化还原反应脱除水体中无机氮[J].感光科学与光化学,2006(04):291-300. |
| [4] | Dong Hyun Kim;Kyung Sub Lee;Yoon-Suk Kim .Photocatalytic Activity of Ni 8 wt percent-Doped TiO_2 Photocatalyst Synthesized by Mechanical Alloying Under Visible Light[J].Journal of the American Ceramic Society,2006(2):515-518. |
| [5] | H.Q.Jiang;P.Wang;X.L.Guo .Preparation and characterization of low-amount Yb3+-doped TiO2 photocatalyst[J].Russian Chemical Bulletin,2006(10):1743-1747. |
| [6] | Dong Hyun Kim;Hyun Seon Hong;Sun Jae Kim .Photocatalytic behaviors and structural characterization of nanocrystalline Fe-doped TiO_2 synthesized by mechanical alloying[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):259-264. |
| [7] | 朱爱民,聂龙辉,张秀玲,石川,宋志民,徐勇.A New Approach to Plasma CVD of TiO2 Photocatalyst on γ-Al2O3 Pellet Filled in Dielectric Barrier Discharges at Atmospheric Pressure[J].等离子体科学和技术（英文版）,2004(06):2546-2548. |
| [8] | Arai Y;Tanaka K;Khlaifat AL .Photocatalysis of SiO2-loaded TiO2[J].Journal of molecular catalysis, A. Chemical,2006(1):85-88. |
| [9] | Zhiliang Jin;Xiaojie Zhang;Yuexiang Li .5.1% Apparent quantum efficiency for stable hydrogen generation over eosin-sensitized CuO/TiO2 photocatalyst under visible light irradiation[J].Catalysis Communications,2007(8):1267-1273. |
| [10] | Ozcan O;Yukruk F;Akkaya EU;Uner D .Dye sensitized artificial photosynthesis in the gas phase over thin and thick TiO2 films under UV and visible light irradiation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):291-297. |
| [11] | Iwasaki M.;Kawada H.;Tada H.;Ito S.;Hara M. .Cobalt ion-doped TiO2 photocatalyst response to visible light[J].Journal of Colloid and Interface Science,2000(1):202-204. |
| [12] | H.Q.Jiang;P.Wang;X.L.Guo .Preparation and characterization of low-amount Yb3+-doped TiO2 photocatalyst[J].Russian Chemical Bulletin,2006(10):1743-1747. |
| [13] | Kim D H;Lee K S;Kim Y S et al.Photocatalytic activity of Ni 8 wt%-doped TiO2 photocatalyst synthesized by mechanical alloying under visible light[Q].Journal of the American Ceramic Society,2006,89(02):515-518. |
| [14] | Xu X H;Wang M;Hou Y et al.Preparation and characterization of Bi-doped TiO2 photocatalyst[J].Journal of Materials Science Letters,2002,21:1655-1656. |
| [15] | Moon J.;Fujishiro Y.;Awano M.;Takagi H. .Preparation and characterization of the Sb-doped TiO2 photocatalysts[J].Journal of Materials Science,2001(4):949-955. |
| [16] | Sato S .Photocatalytic activity of NOx-doped TiO2 in the visible light region[J].Chemical Physics Letters,1986,123(1-2):126-128. |
| [17] | Asahi R;Morikawa T;Ohwaki T et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293:269-271. |
| [18] | Chen SF;Chen L;Gao S;Cao GY .The preparation of nitrogen-doped photocatalyst TiO2-xNx by ball milling[J].Chemical Physics Letters,2005(4-6):404-409. |
| [19] | S.Yin;K.Ihara;Y.Aita;M.Komatsu;T.Sato .Visible-light induced photocatalytic activity of TiO_(2-x)A_y(A = N,S)prepared by precipitation route[J].Journal of Photochemistry and Photobiology, A. Chemistry,2006(1/2):105-114. |
| [20] | Janus M;Inagaki M;Tryba B;Toyoda M;Morawski AW .Carbon-modified TiO2 photocatalyst by ethanol carbonisation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2006(3/4):272-276. |
| [21] | Di Li;Hajime Haneda;Shunichi Hishita;Naoki Ohashi;Nitin K.Labhsetwar .Fluorine-doped TiO_2 powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde[J].Journal of Fluorine Chemistry,2005(1):69-77. |
| [22] | Hongmei Luo;Tsuyoshi Takata;Yungi Lee;Jinfeng Zhao;Kazunari Domen;Yushan Yan .Photocatalytic Activity Enhancing for Titanium Dioxide by Co-doping with Bromine and Chlorine[J].Chemistry of Materials,2004(5):846-849. |
| [23] | Xiaoting Hong;Zhengpeng Wang;Weimin Cai;Feng Lu;Jun Zhang;Yanzhu Yang;Na Ma;Yingjun Liu .Visible-Light-Activated Nanoparticle Photocatalyst of Iodine-Doped Titanium Dioxide[J].Chemistry of Materials,2005(6):1548-1552. |
| [24] | Liu G;Chen Z G;Dong C L et al.Visible light photocatalyst:iodine-doped mesoporous titania with a bicrystalline framework[J].Journal of Physical Chemistry B,2006,110:20823-20828. |
| [25] | Su WY;Zhang YF;Li ZH;Wu L;Wang XX;Li JQ;Fu XZ .Multivalency iodine doped TiO2: Preparation, characterization, theoretical studies, and visible-light photocatalysis[J].Langmuir: The ACS Journal of Surfaces and Colloids,2008(7):3422-3428. |
| [26] | Sandro Usseglio;Alessandro Damin;Domenica Scarano;Silvia Bordiga;Adriano Zecchina;Carlo Lamberti .(I_2)_n Encapsulation inside TiO_2: A Way To Tune Photoactivity in the Visible Region[J].Journal of the American Chemical Society,2007(10):2822-2828. |
| [27] | 胡春;王怡中;汤鸿霄 .TiO2光催化氧化苯酚动力学研究[J].环境科学,1997,15(04):472-479. |
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