以嵌段共聚物P123为模板剂,采用蒸发诱导自组装法制备了铽负载介孔TiO2光催化剂,并利用XRD、N2吸附解吸和UV-Vis吸收光谱等技术手段对样品进行了表征.制备的样品为锐钛矿和金红石混合晶相,以罗丹明B为模拟有机降解物,样品显示了良好的可见光催化活性.研究发现0.7％的铽负载和380℃的煅烧温度是较佳的制备条件.介孔结构所具有的高的比表面积、小的晶粒尺寸、铽负载诱导的电荷分离和可见光吸收增强协同提高了光催化活性.同时,提出了铽负载二氧化钛诱导增强光催化作用的机理.
参考文献
| [1] | 王殿平;刘守新.溶胶-凝胶辅助水热双模板法制备球形介孔TiO2[J].催化学报,201233(10):1681-1688. |
| [2] | 韩一丹;王凯;徐志坚.离子液体修饰溶胶-凝胶法制备介孔二氧化钛[J].硅酸盐学报,201240(09):1289-1293. |
| [3] | 周华锋;刘玉萍;张丽清.介孔二氧化钛负载硅钨杂多酸的制备及其催化性能[J].过程工程学报,201212(03):522-526. |
| [4] | 唐守强;何菁萍;张昭.铁负载介孔二氧化钛的制备及其光催化性能[J].硅酸盐学报,201240(07):950-956. |
| [5] | 姜承志;卢旭东.Tb3+和Sm3+共负载对TiO2降解亚甲基蓝的影响[J].太阳能学报,201132(12):1851-1856. |
| [6] | 唐玉朝;黄显怀;汤利华.N负载TiO2可见光催化降解有机物机理研究[J].环境工程学报,20126(05):1585-1590. |
| [7] | 邹兴;卢惠民;方克明.变价稀土氧化物对催化剂性能的影响[J].稀土,200021(02):16-18. |
| [8] | Turchi C S;Ollis D F.Photocatalytic Degradation of Organic Water Contaminants:Mechanisms Involving Hydroxyl Radical Attack[J].Journal of Catalysis,1990122(01):178-192. |
| [9] | Ismail A A;Bahnemann D W.Mesoporous Titania Photocatalysts:Preparation,Characterization and Reaction Mechanisms[J].Journal of Materials Chemistry,201121:11686-11707. |
| [10] | Li F B;Li X Z;Ao C H.Enhanced Photocatalytic Degradation of VOCs using Ln3+-TiO2 Catalysts for Indoor Air Purification[J].CHEMOSPHERE,200559(06):787-800. |
| [11] | Jing L;Sun X;Xin B.The Preparation and Characterization of La Doped TiO2 Nanoparticles and Their Photocatalytic Activity[J].Journal of Solid State Chemistry,2004177(10):3375-3382. |
| [12] | Lin J;Yu J C.An Investigation on Photocatalytic Activities of Mixed TiO2-rare Earth Oxides for the Oxidation of Acetone in Air[J].Journal of Photochemistry and Photobiology A:Chemistry,1998116(01):63-67. |
| [13] | Peng T;Zhao D;Dai K.Synthesis of Titanium Dioxide Nanoparticles with Mesoporous Anatase Wall and High Photocatalytic Activity[J].Journal of Physical Chemistry B,2005109(11):4947-4952. |
| [14] | Xu A;Gao Y;Liu H.The Preparation,Characterization,and Their Photocatalytic Activities of Rare-earth-doped TiO2 Nanoparticles[J].Journal of Catalysis,2002207(02):151-157. |
| [15] | 张晓勇;晁明举;梁二军.钒负载纳米TiO2薄膜的结构和光吸收性能[J].无机材料学报,200924(01):34-38. |
| [16] | 周华军;王大志;刘金华.纳米二氧化钛的量子尺寸效应及负载氧化锡对其光吸收的影响[J].化学物理学报,200215(01):61-64. |
| [17] | Wagner C D.Handbook of X-Ray Photoelectron Spectroscopy[M].G E Muilenberg Perkin-Elmer,1979:138-139. |
| [18] | Takizawa T;Watanabe T;Honda K.Photocatalysis Through Excitation of Adsorbates.2.A Comparative Study of Rhodamine B and Methylene Blue on Cadmium Sulfide[J].Journal of Physical Chemistry,197882(12):1391-1396. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%