以TiCl4和镧系元素的氯化盐溶液为前驱体,采用溶胶-凝胶法制备了不同含量镧系离子掺杂的TiO2光催化剂,用X射线衍射(XRD)、光致发光光谱(PLS)、表面光电压谱(SPS)和X射线光电子能谱(XPS)对催化剂进行了表征. XRD结果表明,样品为锐钛矿和金红石的混晶相,镧系离子未进入到TiO2晶格中. PLS和SPS测定结果表明,随着掺杂离子的不同和掺杂含量的不同,样品的谱强度呈现有规律的变化. 在紫外光照射下,以咪唑为目标降解物比较了催化剂的光催化活性. 结果表明,适当含量的镧系离子掺杂可有效促进TiO2表面光生载流子的分离,从而显著提高其光催化活性.
参考文献
| [1] | 李慧泉,李越湘,周新木,彭绍琴.Sm2O3掺杂TiO2光催化剂的制备和性能[J].催化学报,2004(10):814-818. |
| [2] | 陈俊涛,李新军,杨莹,王良焱,何明兴.Sm掺杂对TiO2薄膜光催化性能的影响[J].催化学报,2004(05):397-402. |
| [3] | 余家国,熊建锋,程蓓.高活性二氧化钛光催化剂的低温水热合成[J].催化学报,2005(09):745-749. |
| [4] | 唐培松,洪樟连,周时凤,樊先平,王民权.水热法合成在可见光照射下具有高催化活性的纳米TiO2催化剂[J].催化学报,2004(12):925-927. |
| [5] | 井立强,李晓倩,李姝丹,王百齐,辛柏福,付宏刚,王德军,蔡伟民.纳米Au/TiO2光催化剂的XPS和SPS研究[J].催化学报,2005(03):189-193. |
| [6] | Tada H;Akazawa M;Kubo Y;Ito S .[J].Journal of Physical Chemistry B,1998,102(33):6360. |
| [7] | Takeda N;Ohtani M;Torimoto T;Kuwabata S Yoneyama H .[J].Journal of Physical Chemistry B,1997,101(14):2644. |
| [8] | Zhang Y H;Zhang H X;Xu Y X;Wang Y G .[J].Journal of Solid State Chemistry,2004,177(10):3490. |
| [9] | 井立强,付宏刚,王德军,魏霄,孙家钟.掺Sn的纳米TiO2表面光致电荷分离及光催化活性[J].物理化学学报,2005(04):378-382. |
| [10] | Gopalan R;Lin Y S .[J].Industrial and Engineering Chemistry Research,1995,34(04):1189. |
| [11] | Boschloo G.;Hagfeldt A. .Photoinduced absorption spectroscopy of dye-sensitized nanostructured TiO2[J].Chemical Physics Letters,2003(3-4):381-386. |
| [12] | Ranjit K T;Willner I;Bossmann S H;Braun A M .[J].Environmental Science and Technology,2001,35(07):1544. |
| [13] | Lin J;Yu J C .[J].Journal of Photochemistry and Photobiology A:Chemistry,1998,116(01):63. |
| [14] | Yu J C;Yu J G;Ho W K;Zhang L Z.[J].Chemical Communications,2001(19):1942. |
| [15] | Yu J G;Yu J C;Ho W K;Jiang Z T .[J].New Journal of Chemistry,2002,26(05):607. |
| [16] | 井立强,郑莹光,徐自力,董凤霞,孙晓君,蔡伟民,徐英凯.ZnO超微粒子的EPR特性和光催化性能[J].高等学校化学学报,2001(11):1885-1888. |
| [17] | Li, FB;Li, XZ;Hou, MF;Cheah, KW;Choy, WCH .Enhanced photocatalytic activity of Ce3+-TiO2 for 2-mercaptobenzothiazole degradation in aqueous suspension for odour control[J].Applied Catalysis. A, General,2005(1/2):181-189. |
| [18] | Lin Z M;Zhang J L;Han B X;Du J M Mu T C Wang Y Sun Z Y .[J].Microporous and Mesoporous Materials,2005,81(1-3):169. |
| [19] | Yamashita H;Ichihashi Y;Zhang S G;Matsumura Y Souma Y Tatsumi T Anpo M .[J].Applied Surface Science,1997,121/122:305. |
| [20] | Tang H;Berger H;Schmid P E;Levy F Burri G .[J].Solid State Communications,1993,87(09):847. |
| [21] | Tang H;Prasad K;Sanjines R;Schmid P E Levy F .[J].Journal of Applied Physics,1994,75(04):2042. |
| [22] | 李俊华,傅慧静,傅立新,郝吉明.金属离子掺杂的TiO2薄膜的制备及其光催化降解甲苯的性能[J].催化学报,2005(06):503-507. |
| [23] | Kronik L;Shapira Y .[J].Surface Science Reports,1999,37(1-5):1. |
| [24] | Zhai Q Z;Qiu S L;Xiao F S;Zhang Z T Shao C L Han Y .[J].Materials Research Bulletin,2000,35(01):59. |
| [25] | Szaro L.;Misiewicz J.;Rebisz J. .Surface photovoltage in semiconductors under sub-band-gap illumination: Continuous distribution of surface states[J].Applied physics, A. Materials science & processing,1999(4):409-413. |
| [26] | Deng H H;Mao H F;Lu Z H;Xu H J .[J].Thin Solid Films,1998,315(1-2):244. |
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