کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7919837 | 1511484 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reduced graphene oxide coupled with g-C3N4 nanodots as 2D/0D nanocomposites for enhanced photocatalytic activity
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Photocatalytic degradation of organic pollutants requires photocatalysts with superior separation/transfer efficiency of photo-generated electron-hole pairs charge separation ability and broad visible-light adsorption region. 2D Reduced graphene oxide (RGO) coupled with 0D g-C3N4 nanodots (CNDs) as a 2D/0D type of heterojunction photocatalysts were successfully fabricated via a hydrothermal approach. The ultrasmall CNDs were uniformly dispersed on the RGO nanosheets which induced a point contact region in the heterojunction interface, resulting in quicker diffusion from the interior to the surface. In addition, the introduction of RGO narrowed the band gap from 2.8â¯eV (CND) to 2.6â¯eV (composite), which showed good photo-response in visible light region. The as-obtained nanocomposites of RGO-CNDs exhibited significantly enhanced visible-light-driven photocatalytic performance (4.5 fold times higher than pure CNDs) during the Methylene blue (MB) degradation. What is more, excellent photostability could be achieved by the composite (nearly 90% after 5 cycles). The enhanced photocatalytic activity was attributed to the enhanced surface area (by RGO), increased active sites (2D/0D structure), enhanced visible light absorption and effective charge separation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 122, November 2018, Pages 104-108
Journal: Journal of Physics and Chemistry of Solids - Volume 122, November 2018, Pages 104-108
نویسندگان
Li Fu, Xufen Xiao, Aiwu Wang,