کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
152710 | 456504 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: La3+ and Zr4+ co-doped anatase nano TiO2 by sol-microwave method La3+ and Zr4+ co-doped anatase nano TiO2 by sol-microwave method](/preview/png/152710.png)
Anatase nano TiO2 powders were prepared by two different methods. One is the sol-microwave method and the other is oil-bath condition synthesis. A microwave oven (800 W) was used as the microwave source. Under 2.45 GHz microwave irradiation, titanium tetra-isopropoxide (TIP) was quickly hydrolyzed and anatase TiO2 was formed in a short time (<4 min). In addition, a simple sol to gel conversion route has been followed for the preparation of anatase phase at 100 °C under oil-bath condition. The materials characterized by XRD, Raman, SEM-EDX, TEM, FT-IR and UV–vis techniques. XRD and Raman spectroscopy confirmed both pure and co-doped nano TiO2 have a high degree of crystallinity and existence of fully anatase phase at 500 °C. In the microwave method, XRD and TEM results revealed that the particle size of co-doped nano TiO2 is smaller than pure nano TiO2. The photocatalytic activity was tested on the degradation of 4-nitrophenol (4-NP). The nano TiO2 samples prepared by microwave method were more effective than oil- bath samples.
Journal: Chemical Engineering Journal - Volume 157, Issue 1, 15 February 2010, Pages 263–269