کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5146063 | 1497350 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Increased photocatalytic hydrogen evolution and stability over nano-sheet g-C3N4 hybridized CdS core@shell structure
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Increased photocatalytic hydrogen evolution and stability over nano-sheet g-C3N4 hybridized CdS core@shell structure Increased photocatalytic hydrogen evolution and stability over nano-sheet g-C3N4 hybridized CdS core@shell structure](/preview/png/5146063.png)
چکیده انگلیسی
A novel visible-light-active CdS@g-C3N4 photocatalyst was synthesized via a chemisorption method. This core@shell structure catalyst exhibited enhanced photocatalytic H2 production activity under visible-light (λ â¥Â 420 nm) irradiation. The nano-sheet g-C3N4 was successfully coated on CdS nanoparticles with intimate contact. When the content of g-C3N4 in the hybridized composite is 3 wt. %, the hydrogen-production rate of the CdS@g-C3N4 is 2.5 and 2.2 times faster than pure CdS and bulk g-C3N4, respectively. Superior stability was also observed in the cyclic runs. The improvement in stability and activity result from the ability of the Ï-conjugated g-C3N4 material in transporting photo-induced holes. The core@shell structure promoted separation of the photo-generated electron-hole pair and accelerated the emigration speed of the hole from the valence band of CdS. This effect also results in a greatly improved amount of hydrogen production. The possible mechanism for the photocatalytic activity and stability of CdS@g-C3N4 are tentatively proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 27, 6 July 2017, Pages 17435-17445
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 27, 6 July 2017, Pages 17435-17445
نویسندگان
Li Liu, Panru Hu, Wenquan Cui, Xingang Li, Zisheng Zhang,