| 冷宛聪，李文森，黄燕霞，匡 鑫，王崇太，华英杰*.PW11Cu/TiO2/SiO2复合膜的制备及可见光催化性能
研究[J].海南师范大学学报自科版,2019,32(1):18-25 |
| PW11Cu/TiO2/SiO2复合膜的制备及可见光催化性能
研究 |
| Preparation and Visible Photocatalytic Performance of PW11Cu/TiO2/SiO2 Composite Film |
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| DOI：10.12051/j.issn.1674-4942.2019.01.004 |
| 中文关键词: 可见光催化剂 溶胶-凝胶法 罗丹明B降解 Keggin型铜取代杂多酸盐 |
| 英文关键词: visible photocatalyst the sol-gel method rhodamine B degradation Keggin-type Cu-substituted
heteropolyoxometallate |
| 基金项目:国家大学生创新训练项目（201711658001）；海南省重点研发计划项目（ZDYF2017083） |
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| 中文摘要: |
| 采用溶胶-凝胶法将 Keggin 型铜取代的杂多酸盐 Na5PW11O39Cu（II）（PW11Cu）负载于
TiO2/SiO2表面制备出PW11Cu/TiO2/SiO2复合膜可见光催化剂，通过UV-Vis DRS、IR和SEM对其进行
了表征，考察了焙烧温度和PW11Cu含量对此复合膜光催化活性的影响。实验结果表明，PW11Cu/
TiO2/SiO2膜具有良好的可见光吸收活性。复合膜中PW11Cu含量越多，膜的光催化活性越高，而焙
烧温度增高会使得光催化活性降低。当PW11Cu的含量为3.0 g（40 wt%），焙烧温度为373 K时，其
具有最好的可见光催化活性，在250 W可见光下反应3 h，RhB（10 μmol·L-1
）可以达到100％降解，
COD去除率达32％（4 h），经过10次循环实验，催化剂的光催化活性仍保持在93%左右。显示出该
复合光催化剂对RhB降解具有高效性和较强的稳定性。 |
| 英文摘要: |
| The PW11Cu/TiO2 /SiO2 composite film photocatalyst was prepared by loading Keggin-type copper-substituted
heteropolyacid salt Na5PW11O39Cu(II) (PW11Cu) onto the surface of TiO2 and SiO2 using sol-gel method. The PW11Cu/TiO2/
SiO2 composite film photocatalyst were characterized by UV-Vis DRS, IR and SEM.The effect of calcination temperature of
PW11Cu / TiO2 / SiO2 film and PW11Cu content on the photocatalytic activity was investigated. The experimental results
showed that the PW11Cu/TiO2/SiO2 film has excellent absorption capacity of visible light. With the increase of PW11Cu con⁃
tent, the photocatalytic activity increased.However, the photocatalytic activity decreased as the calcination temperature in⁃
creased. The film has the best visible light photocatalytic activity when PW11Cu was 3.0 g (Percentage is 40%) and calcina⁃
tion temperature was 373K. It was employed to degrade RhB with a concentration of 10 µmol·L-1 under the irradiation of
250W xenon lamp, the degradation ratio of RhB was about 100% at 3 h and the COD removal was 32% at 4 h. After 10
times recycles of experiments, the photocatalytic activity of the catalyst remained at about 93%. The results showed that the
degradation of RhB by composite photocatalyst had higher efficiency and stability. |
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