Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents

doi:10.1039/c8qi00419f

	Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents
	Wang, Nan 1,2,3; Li, Xinjun 1,2,3
刊名	INORGANIC CHEMISTRY FRONTIERS
	2018-09-01
卷号	5 期号:9 页码:2268-2275
ISSN号	2052-1553
DOI	10.1039/c8qi00419f
通讯作者	Li, Xinjun(lixj@ms.giec.ac.cn)
英文摘要	A novel photocatalyst with protonated carbon nitride (p-C3N4) loaded with IrO2 quantum dots (QDs) was fabricated via a facile hydrothermal method. Structure characterization studies (XRD, STEM, XPS, UV-vis spectra and PL spectra) revealed that the IrO2 QDs with an average diameter of ca. 2 nm were highly dispersed and anchored to the surfaces of p-C3N4. The introduced IrO2 QDs promoted the electron-hole separation efficiency of p-C3N4 and increased the absorbance capacity within the visible light range. The photocatalytic activity was evaluated using hydrogen and oxygen evolution from water splitting under visible light illumination. The optimum IrO2/C3N4-0.6 wt% photocatalyst exhibits the highest hydrogen evolution rate of 45 mol h(-1) and oxygen production rate of 20 mol h(-1). Under visible light irradiation, the composite photocatalyst shows higher photocurrents, more negative onset potential and lower photoluminescence intensity compared with those of p-C3N4, which demonstrated that the modification of IrO2 QDs accelerated the transformation, separation, and utilization of photoelectrons and thereby significantly improved the photocatalytic performance.
资助项目	Science and Technology Program of Guangzhou, China[201803030019] ; Key Laboratory of Renewable Energy, Chinese Academy Sciences Foundation[Y707j71001] ; Analysis and Testing Center of Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences
WOS关键词	PHOTOCATALYTIC H-2 EVOLUTION ; VISIBLE-LIGHT IRRADIATION ; HYDROGEN EVOLUTION ; G-C3N4 NANOSHEETS ; OXYGEN EVOLUTION ; COCATALYST ; OXIDATION ; FABRICATION ; COMPOSITES ; CATALYSTS
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000445217200023
资助机构	Science and Technology Program of Guangzhou, China ; Key Laboratory of Renewable Energy, Chinese Academy Sciences Foundation ; Analysis and Testing Center of Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/24058]
专题	中国科学院广州能源研究所
通讯作者	Li, Xinjun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Wang, Nan,Li, Xinjun. Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents[J]. INORGANIC CHEMISTRY FRONTIERS,2018,5(9):2268-2275.
APA	Wang, Nan,&Li, Xinjun.(2018).Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents.INORGANIC CHEMISTRY FRONTIERS,5(9),2268-2275.
MLA	Wang, Nan,et al."Protonated carbon nitride nanosheet supported IrO2 quantum dots for pure water splitting without sacrificial reagents".INORGANIC CHEMISTRY FRONTIERS 5.9(2018):2268-2275.