کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5146023 | 1497350 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of the appropriate content of graphene in AgTiO2-graphene ternary nanocomposites applied as photocatalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of the appropriate content of graphene in AgTiO2-graphene ternary nanocomposites applied as photocatalysts Investigation of the appropriate content of graphene in AgTiO2-graphene ternary nanocomposites applied as photocatalysts](/preview/png/5146023.png)
چکیده انگلیسی
AgTiO2-graphene ternary nanocomposites with varying graphene contents were fabricated by photocatalytic reduction. SEM and TEM imaging of the nanocomposites showed that TiO2 nanoparticles decorated with Ag nanoparticles covered graphene nanosheets. A higher content of graphene was shown to be favorable for dye photodegradation. The results of electrochemical analysis revealed that a higher graphene content contributed to increased conductivity and reduced interfacial impedance, which led to more efficient electron transport and thus higher photocatalytic activity. The highest efficiency in dye photodegradation and hydrogen production from water splitting was achieved when the ratio of TiO2 to graphene in the nanocomposite was 5: 1. The corresponding mass-normalized hydrogen evolution rate and quantum efficiency were 129.5 μmol gâ1 hâ1 and 4.8%, respectively. A mechanism for photocatalysis was proposed and discussed. This study demonstrates that the AgTiO2-graphene ternary nanocomposite could be a promising photocatalyst.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 27, 6 July 2017, Pages 17020-17029
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 27, 6 July 2017, Pages 17020-17029
نویسندگان
Fu-Jye Sheu, Chun-Pei Cho,