کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7834525 | 1503529 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facet-controlled synthesis of polyhedral hematite/carbon composites with enhanced photoactivity
ترجمه فارسی عنوان
سنتز کنترل جامد از کامپوزیت های هماتیت پلی کربنات / کربن با افزایش فعالیت عکس
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کلمات کلیدی
هماتیت، کنترل چهره، کامپوزیت، فوتوکاتالیز،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Much effort has been made to develop the semiconductor photocatalysis, but it is still challenging to fabricate low-cost and high-activity photocatalysts. In this study, Hematite (α-Fe2O3) with three kinds of morphologies including dodecahedron, tetrakaidecahedron and hexagonal nanoplates have been synthesized without any organic reagents. The photocatalytic performance reveals that the dodecahedron with exposed {1â¯0â¯1} facets is superior to the hexagonal nanoplates with predominant exposure of {0â¯0â¯1} facets in the case of similar BET surface area. For further enhancement of photocatalytic activity, carbon layer was coated on dodecahedral α-Fe2O3 through the self-polymerization of dopamine and following pyrolysis at 400â¯Â°C under Ar flow. Compared with the pristine dodecahedral α-Fe2O3, the α-Fe2O3/C composites exhibit stronger visible absorption, lower photoexcited electron-hole pairs recombination rate and better photodegradation activity. The photocatalytic performance showed the degradation rate of α-Fe2O3-D/4.5C is nearly 6 times higher than pristine α-Fe2O3, which have great potential for photocatalysis applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 443, 15 June 2018, Pages 227-235
Journal: Applied Surface Science - Volume 443, 15 June 2018, Pages 227-235
نویسندگان
Xiaoyi Hu, Sancan Han, Yufang Zhu,