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Nitrogen self-doped g-C3N4 nanosheets with tunable band structures for enhanced photocatalytic tetracycline degradation

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成果类型:
期刊论文
作者:
Jiang, Longbo;Yuan, Xingzhong*;Zeng, Guangming;Liang, Jie*;Wu, Zhibin;Yu, Hanbo;Mo, Dan;Wang, Hou;Xiao, Zhihua;Zhou, Chengyun
通讯作者:
Liang, Jie;Yuan, Xingzhong
作者机构:
[Zeng, Guangming; Yuan, Xingzhong; Yu, Hanbo; Wang, Hou; Liang, Jie; Zhou, Chengyun; Jiang, Longbo; Mo, Dan] College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China
[Zeng, Guangming; Yu, Hanbo; Wang, Hou; Liang, Jie; Zhou, Chengyun; Jiang, Longbo; Mo, Dan] Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
[Xiao, Zhihua; Wu, Zhibin] College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China
[Yuan, Xingzhong] Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic address: yxz@hnu.edu.cn
通讯机构:
[Liang, Jie; Yuan, Xingzhong] Hunan Univ, Coll Environm Sci & Engn, Changsha 910082, Hunan, Peoples R China.
[Liang, Jie; Yuan, Xingzhong] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
g-C3N4 nanosheets;Nitrogen self-doping;Visible light photocatalysis;Midgap state;Tetracycline degradation
期刊:
JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN:
0021-9797
年:
2019
卷:
536
页码:
17-29
文献类别:
WOS:Article
所属学科:
WOS学科类别:Chemistry, Physical
入藏号:
WOS:000452937800003;PMID:30342408
基金类别:
National Natural Science Foundation of China, China [51739004, 21776066, 51521006, 71431006]; Key Programs of Research and Development Program of Hunan Province, China [2016SK2015, 2017SK2401]
机构署名:
本校为其他机构
院系归属:
生物科学技术学院
摘要:
Metal-free g-C3N4 is always limited by low surface area, rapid charge recombination and limited visible light absorption. In this study, novel porous nitrogen self-doped g-C3N4 nanosheets were prepared by a combination of N self-doping and thermal exfoliation process. Compared to the bulk g-C3N4, N self-doped g-C3N4 nanosheets possessed a high specific surface area of 74.79 m(2) g(-1), enhanced visible light absorption, improved photogenerated electron-holes separation, and prolonged lifetime of photogenerated charge carriers. As a consequence, N self-doped g-C3N4 nanosheets exhibited higher photocatalytic activity for tetracycline (TC) degradation than that of bulk g-C3N4, N self-doped g-C3N4 and g-C3N4 nanosheets. It also exhibited remarkable stability and repeatability. The detailed photocatalytic mechanism was proposed. The midgap states created by N doping can significantly enlarge the visible light absorption, reduce the recombination and prolong the lifetime of photogenerated charge carries. The nanosheet construction can provide increased surface area, abundant active sites, short charge diffusion distance, fast separation and promoted redox abilities of photoexcited charge carries. (C) 2018 Elsevier Inc. All rights reserved.
参考文献:
Bhunia MK, 2014, ANGEW CHEM INT EDIT, V53, P11001, DOI 10.1002/anie.201405161
Cao SW, 2015, ADV MATER, V27, P2150, DOI 10.1002/adma.201500033
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