Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts

被引:1087
作者
Qu, Dan [1 ,2 ]
Zheng, Min [1 ]
Du, Peng [1 ,2 ]
Zhou, Yue [3 ]
Zhang, Ligong [1 ]
Li, Di [1 ]
Tan, Huaqiao [1 ]
Zhao, Zhao [1 ,2 ]
Xie, Zhigang [4 ]
Sun, Zaicheng [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Jilin, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100000, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Jilin, Peoples R China
[4] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
ONE-STEP SYNTHESIS; CARBON DOTS; NITROGEN; NANODOTS; SULFUR; PHOTOLUMINESCENCE; FLUORESCENCE; SHEETS; ROUTE; RICH;
D O I
10.1039/c3nr04402e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A facile hydrothermal synthesis route to N and S, N co-doped graphene quantum dots (GQDs) was developed by using citric acid as the C source and urea or thiourea as N and S sources. Both N and S, N doped GQDs showed high quantum yield (78% and 71%), excitation independent under excitation of 340-400 nm and single exponential decay under UV excitation. A broad absorption band in the visible region appeared in S, N co-doped GQDs due to doping with sulfur, which alters the surface state of GQDs. However, S, N co-doped GQDs show different color emission under excitation of 420-520 nm due to their absorption in the visible region. The excellent photocatalytic performance of the S, N co-doped GQD/TiO2 composites was demonstrated by degradation of rhodamine B under visible light. The apparent rate of S, N: GQD/TiO2 is 3 and 10 times higher than that of N: GQD/TiO2 and P25 TiO2 under visible light irradiation, respectively.
引用
收藏
页码:12272 / 12277
页数:6
相关论文
共 32 条
[1]   Luminescent Carbon Nanodots: Emergent Nanolights [J].
Baker, Sheila N. ;
Baker, Gary A. .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2010, 49 (38) :6726-6744
[2]   Carbon dots for multiphoton bioimaging [J].
Cao, Li ;
Wang, Xin ;
Meziani, Mohammed J. ;
Lu, Fushen ;
Wang, Haifang ;
Luo, Pengju G. ;
Lin, Yi ;
Harruff, Barbara A. ;
Veca, L. Monica ;
Murray, Davoy ;
Xie, Su-Yuan ;
Sun, Ya-Ping .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (37) :11318-+
[3]   Photoluminescence Properties of Graphene versus Other Carbon Nanomaterials [J].
Cao, Li ;
Meziani, Mohammed J. ;
Sahu, Sushant ;
Sun, Ya-Ping .
ACCOUNTS OF CHEMICAL RESEARCH, 2013, 46 (01) :171-180
[4]   Is It Possible to Dope Single-Walled Carbon Nanotubes and Graphene with Sulfur? [J].
Denis, Pablo A. ;
Faccio, Ricardo ;
Mombru, Alvaro W. .
CHEMPHYSCHEM, 2009, 10 (04) :715-722
[5]   Carbon-Based Dots Co-doped with Nitrogen and Sulfur for High Quantum Yield and Excitation-Independent Emission [J].
Dong, Yongqiang ;
Pang, Hongchang ;
Yang, Hong Bin ;
Guo, Chunxian ;
Shao, Jingwei ;
Chi, Yuwu ;
Li, Chang Ming ;
Yu, Ting .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2013, 52 (30) :7800-7804
[6]   Blue luminescent graphene quantum dots and graphene oxide prepared by tuning the carbonization degree of citric acid [J].
Dong, Yongqiang ;
Shao, Jingwei ;
Chen, Congqiang ;
Li, Hao ;
Wang, Ruixue ;
Chi, Yuwu ;
Lin, Xiaomei ;
Chen, Guonan .
CARBON, 2012, 50 (12) :4738-4743
[7]   Luminscent Graphene Quantum Dots for Organic Photovoltaic Devices [J].
Gupta, Vinay ;
Chaudhary, Neeraj ;
Srivastava, Ritu ;
Sharma, Gauri Datt ;
Bhardwaj, Ramil ;
Chand, Suresh .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (26) :9960-9963
[8]   Formation Mechanism of Carbogenic Nanoparticles with Dual Photoluminescence Emission [J].
Krysmann, Marta J. ;
Kelarakis, Antonios ;
Dallas, Panagiotis ;
Giannelis, Emmanuel P. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (02) :747-750
[9]   Carbon nanodots: synthesis, properties and applications [J].
Li, Haitao ;
Kang, Zhenhui ;
Liu, Yang ;
Lee, Shuit-Tong .
JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (46) :24230-24253
[10]   Water-Soluble Fluorescent Carbon Quantum Dots and Photocatalyst Design [J].
Li, Haitao ;
He, Xiaodie ;
Kang, Zhenhui ;
Huang, Hui ;
Liu, Yang ;
Liu, Jinglin ;
Lian, Suoyuan ;
Tsang, Chi Him A. ;
Yang, Xiaobao ;
Lee, Shuit-Tong .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2010, 49 (26) :4430-4434