In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting

doi:10.1039/c8cy02318b

	In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting
	Pawar, Rajendra C.1; Kang, Suhee 2; Han, Hyuksu 3; Choi, Heechae 4,5; Lee, Caroline S.2
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2019-02-21
卷号	9 期号:4 页码:1004-1012
ISSN号	2044-4753
DOI	10.1039/c8cy02318b
通讯作者	Lee, Caroline S.(sunyonglee@hanyang.ac.kr)
英文摘要	Poor optical absorbance and charge recombination are the major drawbacks of polymeric graphitic carbon nitride (g-C3N4)-based photocatalysts. In this paper, we show for the first time a single-step in situ technique to control the porosity of two-dimensional g-C3N4 sheets and exfoliate them by introducing ascorbic acid (AA) molecules. The AA simultaneously acts as the carbon (C) source and deposits amorphous C onto g-C3N4 sheets. Nanosized pores are also introduced into the g-C3N4 sheets, leading to a large number of active sites. The as-prepared C-doped porous g-C3N4 nanosheets demonstrate a high visible light-photocatalytic H-2 production activity of 793 mol g(-1) with the optimum structure, which is almost 25 times higher than the value obtained with bulk g-C3N4 (31 mol g(-1)). This exceptional photocatalytic performance arises from the C-doped conjugated system and porous nanosheets. The enhanced photocatalytic H-2 evolution was attributed to the effective separation and transport of charge carriers by the deposition of C onto the nanosheets and an increased number of active sites resulting from the nanopores created inside the g-C3N4 sheets. Moreover, molecular dynamics (MD) simulations confirm that the interaction between AA and melamine molecules at elevated temperatures results in the formation of C-doped porous and exfoliated g-C3N4 structures. Therefore, the present approach is very promising for application to the design of new and efficient photocatalysts for photocatalytic H-2 evolution under visible irradiation.
资助项目	Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy[20174030201830] ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education)[NRF-2016R1D1A1A02936936]
WOS关键词	GRAPHITIC CARBON NITRIDE ; PHOTOCATALYTIC HYDROGEN EVOLUTION ; DOPED G-C3N4 ; CATALYSTS ; FILMS
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000459893900007
资助机构	Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education) ; National Research Foundation of Korea (NRF) - Korean Government (Ministry of Education)
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165844]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Lee, Caroline S.
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Hanyang Univ, Dept Mat & Chem Engn, Ansan 15588, Gyeonggi Do, South Korea 3.Korean Inst Ind Technol KITECH, Gangwon 25440, South Korea 4.Univ Cologne, Inst Inorgan Chem, Greinstr 6, D-50939 Cologne, Germany 5.Mat Data Corp, Jong Ro 25Gil 30, Seoul 02803, South Korea
推荐引用方式 GB/T 7714	Pawar, Rajendra C.,Kang, Suhee,Han, Hyuksu,et al. In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting[J]. CATALYSIS SCIENCE & TECHNOLOGY,2019,9(4):1004-1012.
APA	Pawar, Rajendra C.,Kang, Suhee,Han, Hyuksu,Choi, Heechae,&Lee, Caroline S..(2019).In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting.CATALYSIS SCIENCE & TECHNOLOGY,9(4),1004-1012.
MLA	Pawar, Rajendra C.,et al."In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting".CATALYSIS SCIENCE & TECHNOLOGY 9.4(2019):1004-1012.