کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364861 | 1388321 | 2009 | 8 صفحه PDF | دانلود رایگان |
Rare-earth oxide-doped titania nanocomposites (RE3+/TiO2, where REÂ =Â Eu3+, Pr3+, Gd3+, Nd3+, and Y3+) were prepared by a one-step sol-gel-solvothermal method. The products exhibited anatase phase structure, mesoporosity, and interesting surface compositions with three oxygen species and two titanium species. The products were used as the photocatalysts to degrade a partially hydrolysis polyacrylamide (HPAM) under UV-light irradiation, a very useful polymer in oil recovery. For comparison, Degussa P25 and as-prepared pure TiO2 were also tested under the same conditions. The enhanced photocatalytic activity was obtained on as-prepared Eu3+ (Gd3+, Pr3+)/TiO2 composites, and the reasons were explained. Finally, the degradation pathway of HPAM over the RE3+/TiO2 composite was put forward based on the intermediates produced during the photocatalysis procedure.
Journal: Applied Surface Science - Volume 255, Issue 6, 1 January 2009, Pages 3731-3738