Eosin Y-sensitized graphitic carbon nitride fabricated by heating urea for visible light photocatalytic hydrogen evolution: the effect of the pyrolysis temperature of urea

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	Eosin Y-sensitized graphitic carbon nitride fabricated by heating urea for visible light photocatalytic hydrogen evolution: the effect of the pyrolysis temperature of urea
	Xu JY(徐俊英)1; Li YX(李越湘)1; Peng SQ(彭绍琴)1; Lu GX(吕功煊)2 ; Li SB(李树本)2
刊名	Physical Chemistry Chemical Physics
	2013
卷号	15 期号:20 页码:7657-7665
ISSN号	1463-9076
通讯作者	李越湘
英文摘要	Graphitic carbon nitride (g-C₃N₄) was prepared by pyrolysis of urea at different temperatures (450–650 ℃), and characterized by thermogravimetric and differential thermal analysis (TG-DTA), elemental analysis (C/H/N), X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), Brunauer–Emmett–Teller (BET) analysis, Fourier transform-infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectra. The samples prepared at low temperatures (450 and 500 ℃) are a mixture of g-C₃N₄ and impurities, whereas the samples prepared at high temperatures (550, 600 and 650 ℃) should be g-C₃N₄ (polymeric carbon nitride). The polymerization degree of g-C₃N₄ for the prepared samples increases to a maximum at 600 ℃ with increasing pyrolysis temperature and then decreases, whereas the defect concentration changes conversely, that is, g-C₃N₄ prepared at 600 ℃ has the lowest defect concentration. Using Eosin Y (EY) and the prepared sample as the sensitizer and the matrix, respectively, the photocatalytic activity for hydrogen evolution from aqueous triethanolamine solution was investigated. The g-C₃N₄ prepared at 600 ℃ exhibits the highest sensitization activity. Under optimum conditions (1.25 × 10^_⁵ mol L^_¹ EY and 7.0 wt% Pt), the maximal apparent quantum yield of EY-sensitized g-C₃N₄ prepared at 600 ℃ for hydrogen evolution is 18.8%. The highest activity can be attributed to the pure composition, the higher dye adsorption amount and the lowest defect concentration.
学科主题	物理化学与绿色催化
收录类别	SCI
资助信息	the National Nature Science Foundation of China (21163012);the National Basic Research Program of China (2009CB220003)
语种	英语
WOS记录号	WOS:000318306100030
公开日期	2013-12-30
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/4933]
专题	兰州化学物理研究所_OSSO国家重点实验室兰州化学物理研究所_ERC国家工程研究中心
作者单位	1.Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Xu JY,Li YX,Peng SQ,et al. Eosin Y-sensitized graphitic carbon nitride fabricated by heating urea for visible light photocatalytic hydrogen evolution: the effect of the pyrolysis temperature of urea[J]. Physical Chemistry Chemical Physics,2013,15(20):7657-7665.
APA	Xu JY,Li YX,Peng SQ,Lu GX,&Li SB.(2013).Eosin Y-sensitized graphitic carbon nitride fabricated by heating urea for visible light photocatalytic hydrogen evolution: the effect of the pyrolysis temperature of urea.Physical Chemistry Chemical Physics,15(20),7657-7665.
MLA	Xu JY,et al."Eosin Y-sensitized graphitic carbon nitride fabricated by heating urea for visible light photocatalytic hydrogen evolution: the effect of the pyrolysis temperature of urea".Physical Chemistry Chemical Physics 15.20(2013):7657-7665.