以单分散性良好的SiO2微球为模板,以钛酸四丁酯为钛源,利用化学吸附和原位水解方法制备了TiO2/SiO2核壳结构复合微球,并在氨气气氛下进行了氮掺杂.以罗丹明B水溶液的光催化降解为模型反应,评价了所制试样在可见光照射下的光催化活性,并借助透射电镜、高分辨透射电镜、X射线衍射、紫外-可见漫反射光谱、红外光谱和X射线光电子能谱等测试手段对其结构、形貌和光谱性质进行了表征.结果表明,氮掺杂nO2/SiO2为核壳结构,TiO2包覆层厚约10 nm.由于SiO2核与TiO2壳间形成了Ti-O-Si键,TiO2的热稳定性增强.掺杂的氮形成了Ti-O-N键.600℃下氮化1 h得到的试样的可见光活性最佳.由于结合了SiO2核优良的吸附性能及氮掺杂TiO2壳的可见光响应性能,该复合微球在整体上表现出比P25更优的光催化活性.
参考文献
| [1] | Fujishima A;Rao T N;Tryk D A .[J].Journal of Photochemistry and Photobiology C:Photochemistry Reviews,2000,1(01):1. |
| [2] | Wang J;Uma S;Klabunde K J .[J].Applied Catalysis B:Environmental,2004,48(02):151. |
| [3] | Wu J C-S;Chen C-H .[J].Journal of Photochemistry and Photobiology A:Chemistry,2004,163(03):509. |
| [4] | Xie YB;Yuan CW;Li XZ .Photocatalytic degradation of X-3B dye by visible light using lanthanide ion modified titanium dioxide hydrosol system[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2005(1):87-94. |
| [5] | Cho K-C;Hwang K-C;Sano T;Takeuchi K Matsuzawa S .[J].Journal of Photochemistry and Photobiology A:Chemistry,2004,161(2-3):155. |
| [6] | Hu Ch;Tang Y Ch;Jiang Zh;Hao Zh P Tang H X Wong P K .[J].Applied Catalysis A:General,2003,253(02):389. |
| [7] | Moon J;Yun C Y;Chung K-W;Kang M-S Yi J .[J].Catalysis Today,2003,87(1-4):77. |
| [8] | Stylidi M.;Kondarides DI.;Verykios XE. .Visible light-induced photocatalytic degradation of Acid Orange 7 in aqueous TiO2 suspensions[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2004(3):189-201. |
| [9] | Asahi R;Morikawa T;Ohwaki T;Aoki K Taga Y .[J].Science,2001,293(5528):269. |
| [10] | Burda C;Lou Y B;Chen X B;Samia A C S Stout J Gole J L .[J].Nano Letters,2003,3(08):1049. |
| [11] | Sato S;Nakamura R;Abe S .Visible-light sensitization of TiO2 photocatalysts by wet-method N doping[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):131-137. |
| [12] | Irie H;Watanabe Y;Hashimoto K .[J].Journal of Physical Chemistry B,2003,107(23):5483. |
| [13] | Miyauchi M;Takashio M;Tobimatsu H .[J].Langmuir,2004,20(01):232. |
| [14] | Nosaka Y;Matsushita M;Nishino J;Nosaka A Y .[J].Science and Technology of Advanced Materials,2005,6(02):143. |
| [15] | Mozia S;Tomaszewska M;Kosowska B;Grzmil B;Morawski AW;Kalucki K .Decomposition of nonionic surfactant on a nitrogen-doped photocatalyst under visible-light irradiation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(3):195-200. |
| [16] | Li, D;Haneda, H;Hishita, S;Ohashi, N .Visible-light-driven N-F-codoped TiO2 photocatalysts. 1. Synthesis by spray pyrolysis and surface characterization[J].Chemistry of Materials,2005(10):2588-2595. |
| [17] | Hanprasopwattana A;Srinivasan S;Sault A G;Datye A K .[J].Langmuir,1996,12(13):3173. |
| [18] | Fu XA.;Qutubuddin S. .Synthesis of titania-coated silica nanoparticles using ono-ionic water-in-oil[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2001(1/3):151-156. |
| [19] | Alemany L J;Banares M A;Pardo E;Martin F GalanFereres M Blasco J M .[J].Applied Catalysis B:Environmental,1997,13(3-4):289. |
| [20] | Kim KD.;Bae HJ.;Kim HT. .Synthesis and growth mechanism of TiO2-coated SiO2 fine particles[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2003(1/3):163-173. |
| [21] | Kim KD.;Bae HJ.;Kim HT. .Synthesis and characterization of titania-coated silica fine particles by semi-batch process[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2003(1/3):119-126. |
| [22] | St(o)ber W;Fink A;Bohn E .[J].Journal of Colloid and Interface Science,1968,26(01):62. |
| [23] | Anderson C;Bard A J .[J].Journal of Physical Chemistry,1995,99(24):9882. |
| [24] | Gole J L;Stout J D;Burda C;Lou Y B Chen X B .[J].Journal of Physical Chemistry B,2004,108(04):1230. |
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