利用棉花模板辅助的两步法制备了ZnO-Zn2TiO4中空纳米纤维结构光催化材料,利用热重分析(TG)、X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见光谱(UV-vis)等技术对其晶体结构、组成、形貌、光吸收特性等进行了表征.以罗丹明B (RB)的降解脱色为模型反应,考察了不同的钛-锌元素质量比(％)对复合材料光催化性能的影响.实验结果表明:所制得的ZnO-Zn2TiO4纳米纤维材料保留了棉花纤维的形貌；Zn2TiO4的引入极大地提高了ZnO材料在紫外光下的光催化活性,并且元素质量比为8％的前驱体在650℃焙烧2.5h时所得样品具有最佳的光催化效果.如在紫外光下,可使RB溶液反应2h的降解脱色率达96.44％,一级反应动力学常数k1达到1.142h-1.同时,该催化剂具有良好的稳定性能,重复使用5次,其对RB溶液的降解脱色率仍在86％以上.
参考文献
| [1] | Sato S .Effects of surface modification with silicon oxides on the photochemical properties of powdered titania[J].Langmuir,1988,4(05):1156. |
| [2] | Akira Fujishima;Tata N. Rao;Donald A. Tryk .Titanium dioxide photocatalysis[J].Journal of photochemistry and photobiology, C. Photochemistry reviews,2000(1):1-21. |
| [3] | Voronmtsov A.V.;Stoyanova I.V. .Kinetics of the Photocatalytic Oxidation of Gaseous Acetone over Platinized Titanium Dioxide[J].Journal of Catalysis,2000(2):360-369. |
| [4] | Nagaveni K;Sivalingam G;Hegde M S et al.Photocatalytic degradation of organic compounds over combustionsynthesized nano-TiO2[J].Environmental Science and Technology,2004,38(05):1600. |
| [5] | F.B.Li;X.Z.Li;M.F.Hou .Photocatalytic degradation of 2-mercaptobenzothiazole in aqueous La~(3+)-TiO_2 suspension for odor control[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2004(3):185-194. |
| [6] | Preparation and characterization of supported ZnO photocatalyst by zincate method[J].Journal of hazardous materials,2010(1/3):484. |
| [7] | El-Kemary, M.;El-Shamy, H.;El-Mehasseb, I. .Photocatalytic degradation of ciprofloxacin drug in water using ZnO nanoparticles[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2010(12):2327-2331. |
| [8] | Kresge C T;Leonowicz M E;Roth W J et al.Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism[J].Nature,1992,359(6397):710. |
| [9] | 徐晓虹,赵娜,吴建锋,田越,王耀.Bi3+掺杂对纳米ZnO形貌及其光催化性能的影响[J].中国陶瓷工业,2009(01):21-25. |
| [10] | S.Anandan;A.Vinu;T.Mori .Photocatalytic degradation of 2,4,6-trichlorophenol using lanthanum doped ZnO in aqueous suspension[J].Catalysis Communications,2007(9):1377-1382. |
| [11] | Martinho H.;Sanjurjo JA.;Rettori C.;Garcia-Adeva AJ.;Huber DL.;Oseroff SB.;Ratcliff W.;Cheong SW.;Pagliuso PG.;Sarrao JL. Martins GB.;Moreno NO. .Magnetic properties of the frustrated antiferromagnetic spinel ZnCr2O4 and the spin-glass Zn1-xCdxCr2O4 (x=0.05,0.10) - art. no. 024408[J].Physical Review.B.Condensed Matter,2001(2):4408-0. |
| [12] | Andreas Zerr;Gerhard Miehe;George Serghiou;Marcus Schwarz;Edwin Kroke;Ralf Riedel;Hartmut Fuess;Peter Kroll;Reinhard Boehler .Synthesis of cubic silicon nitride[J].Nature,1999(6742):340-342. |
| [13] | Kim,BN;Hiraga,K;Morita,K;Sakka,Y .A high-strain-rate superplastic ceramic.[J].Nature,2001(6853610):288-291. |
| [14] | Jahren A H;Kruger M B;Jeanloz R .Alexandrite as a hightemperature pressure calibrant,and implications for the ruby-fluorescence scale[J].Journal of Applied Physics,1992,71(04):1579. |
| [15] | K. Jothimurugesan;Santosh K. Gangwal .Regeneration of Zinc Titanate H_2S Sorbents[J].Industrial & Engineering Chemistry Research,1998(5):1929-1933. |
| [16] | Alonso L;Palacios J M;Moliner R .The performance of some ZnO-based regenerable sorbents in hot coal gas desulfurization long-term tests using graphite as a pore-modifier additive[J].Energy and Fuels,2001,15(06):1396. |
| [17] | Lysova N N;Shapovalova L P;Lukyanenko V P .Preparing zinc orthotitannte by coprecipitation[J].Inorganic Materials,1991,27(03):542. |
| [18] | Mikhailov M M;Dvoretskii M I .Distinctive features of the variation of the optical properties of zinc orthotitanate under separate and combined irradiation with electrons,protons,and ultraviolet light[J].Inorganic Materials,1991,27(11):2021. |
| [19] | 苏碧桃,朱平武,许晶晶,赵丽.ZnTiO3-TiO2纳米复合材料的光催化性能[J].应用化学,2011(01):33-38. |
| [20] | Jina Choi;Hyunwoong Park;Michael R. Hoffmann .Effects of Single Metal-Ion Doping on the Visible-Light Photoreactivity of TiO2[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(2):783-792. |
| [21] | Guanglei Tian;Lei Dong;Chaoyang Wei;Jainbing Huang;Hongbo He;Jianda Shao .Investigation on microstructure and optical properties of titanium dioxide coatings annealed at various temperature[J].Optical materials,2006(8/9):1058-1063. |
| [22] | Lakshminarasimhan N;Bae E;Choi W .Enhanced photocatalytic production of H-2 on mesoporous TiO2 prepared by template-free method: Role of interparticle charge transfer[J].The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory,2007(42):15244-15250. |
| [23] | Ekambarama S;Iikubo Y;Kudo A .Combustion synthesis and photocatalytic properties of transition metal-incorporated ZnO[J].Journal of Alloys and Compounds,2007,433(1-2):237. |
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