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Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity
Li, Yibing1; Zhang, Haimin1; Liu, Porun1; Wang, Dan2; Li, Ying1,3; Zhao, Huijun1
2013-10-11
Source PublicationSMALL
ISSN1613-6810
Volume9Issue:19Pages:3336-3344
AbstractCross-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.
KeywordGraphitic Carbon Nitrides Reduced Graphene Oxides Nanocomposites Covalent Bonds Photocatalysis
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1002/smll.201203135
Indexed BySCI
Language英语
WOS KeywordAMORPHOUS-CARBON NITRIDE ; REDUCED GRAPHENE OXIDE ; ELECTRONIC-STRUCTURE ; METHYL-ORANGE ; TIO2 ; COMPOSITES ; FILMS ; C3N4 ; NANOPARTICLES ; IRRADIATION
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000327899900022
Citation statistics
Cited Times:395[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13369
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
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