Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity

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	Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity
	Li, Yibing 1; Zhang, Haimin 1; Liu, Porun 1; Wang, Dan 2; Li, Ying 1,3; Zhao, Huijun 1
刊名	SMALL
	2013-10-11
卷号	9 期号:19 页码:3336-3344
关键词	graphitic carbon nitrides reduced graphene oxides nanocomposites covalent bonds photocatalysis
ISSN号	1613-6810
英文摘要	Cross-linked rather than non-covalently bonded graphitic carbon nitride (g-C3N4)/reduced graphene oxide (rGO) nanocomposites with tunable band structures have been successfully fabricated by thermal treatment of a mixture of cyanamide and graphene oxide with different weight ratios. The experimental results indicate that compared to pure g-C3N4, the fabricated CN/rGO nanocomposites show narrowed bandgaps with an increased in the rGO ratio. Furthermore, the band structure of the CN/rGO nanocomposites can be readily tuned by simply controlling the weight ratio of the rGO. It is found that an appropriate rGO ratio in nanocomposite leads to a noticeable positively shifted valence band edge potential, meaning an increased oxidation power. The tunable band structure of the CN/rGO nanocomposites can be ascribed to the formation of C-O-C covalent bonding between the rGO and g-C3N4 layers, which is experimentally confirmed by Fourier transform infrared (FT-IR) and X-ray photoelectron (XPS) data. The resulting nanocomposites are evaluated as photocatalysts by photocatalytic degradation of rhodamine B (RhB) and 4-nitrophenol under visible light irradiation ( > 400 nm). The results demonstrate that the photocatalytic activities of the CN/rGO nanocomposites are strongly influenced by rGO ratio. With a rGO ratio of 2.5%, the CN/rGO-2.5% nanocomposite exhibits the highest photocatalytic efficiency, which is almost 3.0 and 2.7 times that of pure g-C3N4 toward photocatalytic degradation of RhB and 4-nitrophenol, respectively. This improved photocatalytic activity could be attributed to the improved visible light utilization, oxidation power, and electron transport property, due to the significantly narrowed bandgap, positively shifted valence band-edge potential, and enhanced electronic conductivity.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]	AMORPHOUS-CARBON NITRIDE ; REDUCED GRAPHENE OXIDE ; ELECTRONIC-STRUCTURE ; METHYL-ORANGE ; TIO2 ; COMPOSITES ; FILMS ; C3N4 ; NANOPARTICLES ; IRRADIATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000327899900022
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13369]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Griffith Univ, Griffith Sch Environm, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
推荐引用方式 GB/T 7714	Li, Yibing,Zhang, Haimin,Liu, Porun,et al. Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity[J]. SMALL,2013,9(19):3336-3344.
APA	Li, Yibing,Zhang, Haimin,Liu, Porun,Wang, Dan,Li, Ying,&Zhao, Huijun.(2013).Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity.SMALL,9(19),3336-3344.
MLA	Li, Yibing,et al."Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity".SMALL 9.19(2013):3336-3344.