کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1554334 | 1513250 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method Synthesis of mesoporous nanocrystalline titania powders by nonhydrolitic sol-gel method](/preview/png/1554334.png)
چکیده انگلیسی
Mesoporous titania with well-crystallized anatase phase was synthesized by nonhydrolytic sol-gel process combined with solvothermal treatment. Titanium-isopropoxide, titanium-tetrachloride, and carbon-tetrachloride were used for synthesis under nitrogen atmosphere in a glove box. The obtained mixture was heated in an autoclave at 140 Â âC for 3Â h and 30 h. XRD analysis showed that dry gels contained anatase phase with low crystallinity, while powders obtained by calcination of dry gels at 500Â âC for 3 h consisted of pure anatase with high crystallinity. SEM analysis of dried gels and powders shows agglomerates of spherical particles of the size â¼300 nm. The TEM micrographs confirmed the nanoscale size of the titania powders, with the primary particle size of about 20 nm. Titania powders exhibit maximum pore diameter of 13.2 nm and 9.5 nm for gelation time 3 h and 30 h, respectively. The photocatalytic activity of such synthesized titania is superior to that of commercial photocatalyst Degussa P-25.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 46, Issues 1â2, JulyâAugust 2009, Pages 217-222
Journal: Superlattices and Microstructures - Volume 46, Issues 1â2, JulyâAugust 2009, Pages 217-222
نویسندگان
N. TanaskoviÄ, Ž. RadovanoviÄ, V. ÄokiÄ, J. KrstiÄ, S. DrmaniÄ, Dj. JanaÄkoviÄ, R. PetroviÄ,