Bright and tunable photoluminescence from the assembly of red g-C3N4 nanosheets

被引:35
作者
Zhang, Xiao [1 ]
Jiang, San Ping [1 ]
Yang, Ping [2 ]
机构
[1] Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn, Perth, WA 6845, Australia
[2] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
Photoluminescence; Nanosheets; Assembly; GRAPHITIC CARBON NITRIDE; QUANTUM DOTS; GRAPHENE; NANOCRYSTALS; MELEM; IONS;
D O I
10.1016/j.jlumin.2021.118055
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
It is challenging to construct g-C3N4 (normally as a photocatalyst) with tunable and stable photoluminescence (PL) in solution or in powder form. In this paper, a molten-salt-assisted route has been developed to create red superior thin carbon nitride (g-C3N4) nanosheets with redshifted absorption spectrum and narrowed bandgap of 1.91 eV. Interestingly, these g-C3N4 nanosheets exhibit excellent water soluble nature. The colloidal solution of the nanosheets reveals bright, stable, and tunable PL from blue to yellow. The PL of samples depends on the concentration of g-C3N4 nanosheets. At lower concentration, a blue-emitting band is observed, while a green to yellow emitting band is recorded at higher concentration. Namely, the powder sample reveals a broad green to yellow emitting band. A reversible PL phenomenon is observed by precipitation of g-C3N4 colloidal solution. This phenomenon is ascribed to the assembly of these g-C3N4 nanosheets. The PL efficiency of red-coloured g-C3N4 nanosheets powder is 75%. Both powder and colloidal solution g-C3N4 samples reveal excellent PL stability. The PL intensity and efficiency of the powder samples remain almost unchanged after half year. These water-soluble red g-C3N4 nanosheets thus can be effectively utilized for light emitting diodes and bioimages.
引用
收藏
页数:8
相关论文
共 37 条
[31]   Construction of 2D g-C3N4 lateral-like homostructures and their photo- and electro-catalytic activities [J].
Zhang, Xiao ;
Veder, Jean-Pierre ;
He, Shuai ;
Jiang, San Ping .
CHEMICAL COMMUNICATIONS, 2019, 55 (09) :1233-1236
[32]   Single-Layered Graphitic-C3N4 Quantum Dots for Two-Photon Fluorescence Imaging of Cellular Nucleus [J].
Zhang, Xiaodong ;
Wang, Hongxia ;
Wang, Hui ;
Zhang, Qiong ;
Xie, Junfeng ;
Tian, Yupeng ;
Wang, Jun ;
Xie, Yi .
ADVANCED MATERIALS, 2014, 26 (26) :4438-+
[33]   Enhanced Photoresponsive Ultrathin Graphitic-Phase C3N4 Nanosheets for Bioimaging [J].
Zhang, Xiaodong ;
Xie, Xiao ;
Wang, Hui ;
Zhang, Jiajia ;
Pan, Bicai ;
Xie, Yi .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2013, 135 (01) :18-21
[34]   Activation of Carbon Nitride Solids by Protonation: Morphology Changes, Enhanced Ionic Conductivity, and Photoconduction Experiments [J].
Zhang, Yuanjian ;
Thomas, Arne ;
Antonietti, Markus ;
Wang, Xinchen .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (01) :50-+
[35]   Emission of Mn2+ ions in Mn:CsPbX3 (x = Cl, Br, I) nanocrystals adjusted with halogen ion ratios [J].
Zhao, Yubin ;
Xie, Cong ;
Song, Yuxiang ;
Yang, Ping .
JOURNAL OF NANOPARTICLE RESEARCH, 2020, 22 (06)
[36]   Melem: an efficient metal-free luminescent material [J].
Zheng, H. B. ;
Chen, W. ;
Gao, H. ;
Wang, Y. Y. ;
Guo, H. Y. ;
Guo, S. Q. ;
Tang, Z. L. ;
Zhang, J. Y. .
JOURNAL OF MATERIALS CHEMISTRY C, 2017, 5 (41) :10746-10753
[37]   Surface Chemistry Routes to Modulate the Photoluminescence of Graphene Quantum Dots: From Fluorescence Mechanism to Up-Conversion Bioimaging Applications [J].
Zhu, Shoujun ;
Zhang, Junhu ;
Tang, Shijia ;
Qiao, Chunyan ;
Wang, Lei ;
Wang, Haiyu ;
Liu, Xue ;
Li, Bo ;
Li, Yunfeng ;
Yu, Weili ;
Wang, Xingfeng ;
Sun, Hongchen ;
Yang, Bai .
ADVANCED FUNCTIONAL MATERIALS, 2012, 22 (22) :4732-4740