首先以沉积-沉淀法制备AgBr/TiO2复合催化剂,然后采用离子交换法制备出新型的异质结型AgI/AgBr/TiO2光催化剂.利用XRD和UV-Vis对AgI/AgBr/TiO2光催化剂进行了表征.以甲基橙为染料模型,在可见光条件下(500 W、λ>420 nm)研究了AgI的含量对AgI/AgBr/TiO2催化活性的影响.结果表明,AgI拓展了催化剂的吸收光谱范围;AgI生成量为AgBr的5%时,AgI/AgBr/TiO2的催化活性最高.AgI/AgBr异质结的形成有利于光生电子和空穴的分离,提高AgI/AgBr/TiO2的催化活性.
参考文献
| [1] | Xu JH;Li JX;Dai WL;Cao Y;Li HX;Fan KN .Simple fabrication of twist-like helix N,S-codoped titania photocatalyst with visible-light response[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(1):72-80. |
| [2] | Yoichi Ishibai;Junya Sato;Takashi Nishikawa .Synthesis of visible-light active TiO2 photocatalyst with Pt-modification: Role of TiO2 substrate for high photocatalytic activity[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(2):117-121. |
| [3] | Zhao J C;Chen C C;Ma W H .Photocatalytic degradation of organic pollutants under Visible light irradiation[J].Topics in Catalysis,2005,35(3-4):269-278. |
| [4] | Brahimi R;Bessekhouad Y;Bouguelia A;Trari M .Improvement of eosin visible light degradation using PbS-sensititized TiO2[J].Journal of Photochemistry and Photobiology, A. Chemistry,2008(2/3):173-180. |
| [5] | Soni SS;Henderson MJ;Bardeau JF;Gibaud A .Visible-light photocatalysis in titania-based mesoporous thin films[J].Advanced Materials,2008(8):1493-1498. |
| [6] | Li G S;Zhang D Q;Yu J C .Ordered mesoporous BiVO4 through anocasting:A superior visible light-driven photocatalyst[J].Chemistry of Materials,2008,20:3983-3992. |
| [7] | Abe R;Takami H;Murakami N;Ohtani B .Pristine simple oxides as visible light driven photocatalysts: Highly efficient decomposition of organic compounds over platinum-loaded tungsten oxide[J].Journal of the American Chemical Society,2008(25):7780-7781. |
| [8] | Maeda K;Teramura K;Lu D;Takata T;Saito N;Inoue Y;Domen K .Photocatalyst releasing hydrogen from water.[J].Nature,2006(7082):295-0. |
| [9] | Tang J;Zou Z;Ye J .Efficient photocatalytic decompositionof organic contaminants over CaBi2O4 under visible-light irradiation[J].Angewandte Chemie,2004,116:4563-4566. |
| [10] | Zou Z G;Ye J H;Sayama K et al.Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst[J].Nature,2001,414:625-627. |
| [11] | 张庆庆,汤斌.胶体氯化银抗菌膜的制备及其光催化抗菌特性[J].南京理工大学学报（自然科学版）,2004(05):547-551. |
| [12] | 李国平,李杰,罗运军.AgBr纳米簇：PAMAM树形分子模板法制备及光催化性能研究[J].无机化学学报,2007(02):253-257. |
| [13] | Wang P;Huang B B;Qin X X et al.Ag@AgCl:A highly efficient and stable photocatalyst active under visible light[J].Angewandte Chemie International Edition,2008,41:7931-7934. |
| [14] | Wang P;Huang BB;Zhang XY;Qin XY;Jin H;Dai Y;Wang ZY;Wei JY;Zhan J;Wang SY .Highly Efficient Visible-Light Plasmonic Photocatalyst Ag@AgBr[J].Chemistry: A European journal,2009(8):1821-1824. |
| [15] | Kakuta N;Goto N;Ohkita H et al.Silver bromide as a photocatalyst for hydrogen generation from CH3OH/H2O solution[J].Journal of Physical Chemistry B,1999,103(29):517-519. |
| [16] | Rodrigues S;Uma S;Martyanov IN;Klabunde KJ .AgBr/Al-MCM-41 visible-light photocatalyst for gas-phase decomposition of CH3CHO[J].Journal of Catalysis,2005(2):405-410. |
| [17] | Hu C;Lan Y Q;Qu J H et al.Ag/AgBr/TiO2 visible light photocatalyst for destruction of azodyes and bacteria[J].Journal of Physical Chemistry B,2006,110(09):4066-4072. |
| [18] | Hu C;Hu XX;Wang LS;Qu JH;Wang AM .Visible-light-induced photocatalytic degradation of azodyes in aqueous AgI/TiO2 dispersion[J].Environmental Science & Technology: ES&T,2006(24):7903-7907. |
| [19] | Lan YQ;Hu C;Hu XX;Qu JH .Efficient destruction of pathogenic bacteria with AgBr/TiO2 under visible light irradiation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):354-360. |
| [20] | Mohammad R. Elahifard;Sara Rahimnejad;Saeed Haghighi .Apatite-Coated Ag/AgBr/TiO2 Visible-Light Photocatalyst for Destruction of Bacteria[J].Journal of the American Chemical Society,2007(31):9552-9553. |
| [21] | Yujing Zang;Ramin Farnood .Photocatalytic activity of AgBr/TiO2 in water under simulated sunlight irradiation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(4):334-340. |
| [22] | 曹静,林海莉,贾丽,陈士夫.AgBr/TiO_2复合催化剂：双注法制备及其可见光催化性能[J].影像科学与光化学,2009(06):462-468. |
| [23] | Zhou X F;Hu C;Hu X X et al.Plasmon-assited degradation of toxic pollutions with Ag-AgBr/Al2O3 under visible-light irradiation[J].Journal of Physical Chemistry C,2010,114(06):2746-2750. |
| [24] | Wang, P;Huang, BB;Qin, XY;Zhang, XY;Dai, Y;Whangbo, MH .Ag/AgBr/WO3 center dot H2O: Visible-Light Photocatalyst for Bacteria Destruction[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2009(22):10697-10702. |
| [25] | Hu C;Peng T W;Hu X X et al.Plasmon-induced photodegradation of toxic pollutions with Ag-AgI/Al2O3 under visible-light irradiation[J].Journal of the American Chemical Society,2010,132(02):857-862. |
| [26] | Cheng, H.;Huang, B.;Dai, Y.;Qin, X.;Zhang, X. .One-step synthesis of the nanostructured AgI/BiOI composites with highly enhanced visible-light photocatalytic performances[J].Langmuir: The ACS Journal of Surfaces and Colloids,2010(9):6618-6624. |
| [27] | 于洪涛,全燮.纳米异质结光催化材料在环境污染控制领域的研究进展[J].化学进展,2009(02):406-419. |
| [28] | Tani T.Photographic Sensitivity:Theory and Mechanisms[M].New York:Oxford Univeristy Press,1995 |
| [29] | Gordienko A B;Zhuravlev Y N;Poplavn A S .Electronic structure of AgCl,AgBr,and AgI[J].Physical Status Solidi B Basic Research,1991,168:149-156. |
| [30] | Victora RH. .CALCULATED ELECTRONIC STRUCTURE OF SILVER HALIDE CRYSTALS[J].Physical Review.B.Condensed Matter,1997(8):4417-4421. |
| [31] | Youji Li;Xiaodong Li;Junwen Li;Jing Yin .Photocatalytic degradation of methyl orange by TiO_2-coated activated carbon and kinetic study[J].Water research: A journal of the international water association,2006(6):1119-1126. |
| [32] | 刘守新;刘鸿.光催化及光电催化基础与应用[M].北京:化学工业出版社,2006 |
| [33] | Chen S F;Zhao W;Liu W et al.Preparation,characterization and activity evaluation of p-n junction photocatalyst p-CaFe2O4/n-Ag3VO4 under visible light irradiation[J].Journal of Hazardous Materials,2009,172:14151423. |
| [34] | Xuexiang Hu;Chun Hu;Jiuhui Qu .Preparation and visible-light activity of silver vanadate for the degradation of pollutants[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2008(11):2986-2997. |
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