通过溶胶-凝胶(Sol-Gel)法制备了ZnTiO<,3>-TiO<,2>纳米复合光催化剂,利用透射电子显微镜、X射线衍射、紫外-可见吸收光谱和ξ电位等测试技术对其形貌、晶体结构及其光谱响应特性进行了表征.以亚甲基蓝(MB)溶液的脱色降解为模型反应,考察了光源和焙烧温度对该纳米复合材料光催化性能的影响.结果表明,所得纳米复合材料的催化性能与材料的尺寸、在介质中的分散性能、表面荷电性质等有关.600℃下焙烧3 h所得的ZnTiO<,3>-Tio<,2>纳米复合材料尺寸小(约60 nm)、分散性能好、表面荷负电荷最最高、催化性能最好,且在太阳光下的活性高于紫外光下的.如太阳光下7 h可使亚甲基蓝(MB)溶液的脱色降解率达到93%,而在紫外光下只有82%;并且其催化活性高于纯TiO<,2>和ZnO的.该纳米复合催化剂重复使用4次仍能使亚甲基蓝(MB)溶液的脱色降解率在80%以上.因此,具有较好的光催化稳定性能.
参考文献
[1] | Zou Z,Ye J,Sayama K,et al.Direct Splitting of Water under Visible Light Irradiation with an Oxide Semiconductor Photocatalyst[J].Nature,2001,424:625-627. |
[2] | Yamashita H,Harada M.Misaka J,et al.Degradation of Propanol Diluted in Water under Visible Light Irradiation Using Metal Ion-Implanted Titanium Dioxide Photocatalysts[J].J Photochem Photobiol A[l],2002,148(1/3):257-261. |
[3] | Asahi R.Morikawa T.Ohwaki T,et al.Visible-light Photocatalysis in Nitrogen-Doped Titanium Oxides[J].Science[J],2001,293(5528):269-271. |
[4] | Khan S U M,Al-Shahry M,Ingler W B Jr.Efficient Photochemical Water Splitting by a Chemically Modified n-TiO2[J].Science,2002,297(5590):2243-2245. |
[5] | Ishikawa A.Takata T,Kondo J N,et al.Oxysulfide Sm2Ti2S2O5 as a Stable Photocatalyst for Water Oxidation and Reduction under Visible Light Irradiation[J].J Am Chem Soc,2002,124(45):13547-13553. |
[6] | MA Zhanying,MU Hongmei,SU Bitao,et al.Catalytic Degradation of MB Solution on TiO2/Conjugated Polymer Nanocomposites Under Natural Light[J].Chinese J Appl Chem,2008,25 (1):33-37(in Chinese).马占营,慕红梅,苏碧桃,等.共轭高分子改性TiO2在自然光下催化降解亚甲基蓝水溶[J].应用化学,2008,25(1):33-37. |
[7] | MA Zhanying,MIN Shixiong,SHE Shixiong,et al.Catalytic Property of ZnO/Conjugated Polymer Complex Particles Under Natural Light[J].Chinese J Appl Chem,2005,22(10):1137-1340(in Chinese).马占营,敏世雄,佘世雄,等.自然光下ZnO/共轭高分子复合微粒的催化性能[J].应用化学,2005,22(10):1137-1340. |
[8] | De G C,Roy A M,Bhattacharya S S.Effect of n-Si on the Photocatalytic Production of Hydrogen by Pt-loaded CdS and CdS/ZnS Catalyst[J].Int J Hydrogen Energy[J],1996,21(1):19-23. |
[9] | Hwang D W,Kim J,Park T J,et al.Mg-Doped WO3 as a Novel Photocatalyst for Visible Light-Induced Water Splitting[J].Catal Lett[J],2002,80(1/2):53-57. |
[10] | Yao W F,Xu X H,Wang H,et al.Photocatalytic Property of Perovskite Bismuth Titanate[J].Appl Catal B:Environ[J],2004,52(2):109-116. |
[11] | Kim J,Hwang D W.Kim H G,et al.Nickel-loaded La2Ti2O7 as a Bifunctional Photocatalyst[J].Chem Commun,2002,21(10):2488-2489. |
[12] | Kim H G,Hwang D W,Lee J S.An Undoped,Single-Phase Oxide Photocatalyst Working under Visible Light[J].J Am Chem Soc,2004,126(29):8912-8913. |
[13] | Machida M,Miyazaki K,Matsushima S,et al.Photocatalytic Properties of Layered Perovskite Tantalates,MLnTa2O7 (M=Cs,Rb,Na,and H;Ln=La,Pr,Nd,and Sm)[J].JMater Chem,2003,13(6):1433-1437. |
[14] | Machida M,Mitsuyama T,Ikeue K,et al.Photocatalytic Property and Electronic Structure of Triple-Layered Perovskite Tantalates,MCa2Ta3O10(M =Cs,Na,H,and C6H13NH3)[J].J Phys Chem 5,2005,109(16):7801-7806. |
[15] | Hwang D W.Lee J S,Li W,et al.Electronic Band Structure and Photocatalytic Activity of Ln2Ti2O7(Ln = La,Pr,Nd)[J].J Phys Chem B,2003,107(21):4963-4970. |
[16] | Hwang D W,Kim H G,Lee J S,et al.Photocatalytic Hydrogen Production from Water over M-Doped La2Ti2O7(M =Cr,Fe) under Visible Light Irradiation[J].J Phys Chem B,2005,109(6):2093-2102 |
[17] | LIN Yuanhua,ZHANG Zhongtai,HUANG Shulan.et al.Nanometer Rutile Powder and Its Characterization[J].J Inorg Mater,1999,14(6):853-859(in Chinese).林元华,张中太,黄淑兰,等.纳米金红石型粉体的制备及其表征[J].无机材料学报,1999,14(6):853-859. |
[18] | Goswami D Y.Preparation,Characterization and Photo-Catalytic Behavior of Y2O3/TiO2 Composite Semiconductor Nanopowder[J].J Sol Energy Eng,1997,119(2):101-107. |
[19] | Linsebigler A,Lu G,Yates J T.Photocatalysis on TiO2 Surfaces:Principles,Mechanisms,and Selected Results[J].Chem Rev,1995,95(3):735-758. |
[20] | LI Qi,HUANG Yuanhe,CHEN Guangju.et al Chief-Edr.Chinese Journal of Structural Chemistry[M].1st Edn.Beijing:Peking Normal University Press,2008:316-317(in Chinese).李奇,黄元河,陈广巨,等主编.结构化学[M].第1版.北京:北京师范大学出版社,2008:316-317. |
[21] | SU Bitao,SUN Jiaxing,HU Changlin,et al.Preparation and Characterization of Fe3+-Doped TiO2 Photocatalytic Fiber Materials[J].Acta Phys-Chim Sin,2009,25(8):1566-1566(in Chinese).苏碧桃,孙佳星,胡常林,等.Fe3+掺杂光催化纤维材料的制备及表征[J].物理化学学报,2009,25(8):1566-1566. |
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