Journal ArticleDOI
New methods of synthesis and varied properties of carbon quantum dots with high nitrogen content
TLDR
In this article, the authors present simple methods to synthesize carbon quantum dots (CQDs) with high nitrogen doping content, involving the reaction of glucose in the presence of urea under hydrothermal conditions or by microwave irradiation.Abstract:
Doping of a heteroatom such as nitrogen in carbon nanomaterials provides a means to tailor their electronic properties and chemical reactivities. In this article, we present simple methods to synthesize carbon quantum dots (CQDs) with high nitrogen doping content (18–22%), involving the reaction of glucose in the presence of urea under hydrothermal conditions or by microwave irradiation. The N-doped carbon quantum dots (N-CQDs) show high aqueous solubility and tunable photoluminescence (PL). Interaction of N-CQDs with exfoliated graphene or dimethylaniline quenches PL. Interaction of N-doped as well as undoped C-dots with electron-donating tetrathiafulvalene and electron-withdrawing tetracyanoethylene has been examined. The intense blue PL of CQDs has been exploited to produce white light by mixing the CQDs with yellow light emitting ZnO nanoparticles or graphene oxide. The N-doped CQDs exhibit superior photocatalytic activity compared to pristine CQDs.read more
Citations
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Journal ArticleDOI
Starch (Tapioca) to carbon dots: an efficient green approach to an on–off–on photoluminescence probe for fluoride ion sensing
Aniruddha Basu,Anil Suryawanshi,Begraj Kumawat,Anshu Dandia,Debanjan Guin,Satishchandra Ogale +5 more
TL;DR: The as-prepared carbon dots used as photoluminescence probes for highly anion selective fluoride ion detection in aqueous solutions and a ready-to-use device is demonstrated.
Journal ArticleDOI
Synthesis and characterization of high efficient photoluminescent sunlight driven photocatalyst of N-Carbon Quantum Dots
TL;DR: In this article, a one-step simple, novel and efficient route for the preparation of N-doped carbon quantum dots (N-CQDs) has been established through the hydrothermal method, using diethylenetriamine (DETA) and citric acid (CA) as the surface passivation agent and carbon source, respectively.
Journal ArticleDOI
Electrochemical Cutting in Weak Aqueous Electrolytes: The Strategy for Efficient and Controllable Preparation of Graphene Quantum Dots.
Haoguang Huang,Siwei Yang,Qingtian Li,Yucheng Yang,Yucheng Yang,Gang Wang,Xiaofei You,Baohua Mao,Wang Huishan,Ma Yu,Peng He,Zhi Liu,Zhi Liu,Guqiao Ding,Xiaoming Xie,Xiaoming Xie +15 more
TL;DR: A weak electrolyte-based electrochemical method is developed to enhance the oxidation and cutting process and therefore achieve a high yield of GQDs and shows excellent crystallinity which is obviously better than the crystallinity obtained via bottom-up approaches.
Journal ArticleDOI
Synthesis of N-doped graphene quantum dots by pulsed laser ablation with diethylenetriamine (DETA) and their photoluminescence.
Svette Reina Merden Santiago,T. N. Lin,C. H. Chang,Y. A. Wong,C. A. J. Lin,Chi-Tsu Yuan,J. L. Shen +6 more
TL;DR: A facile, fast, and one-step approach to prepare N-doped graphene quantum dots (GQDs) using pulsed laser ablation with diethylenetriamine (DETA) is reported, which emits enhanced photoluminescence (PL) with a factor as high as 66.
Journal ArticleDOI
A fluorescence probe based on the nitrogen-doped carbon dots prepared from orange juice for detecting Hg 2+ in water
Zhili Li,Ying Zhang,Ying Zhang,Qianqian Niu,Qianqian Niu,Mingyao Mou,Mingyao Mou,Yi Wu,Yi Wu,Xiaoxuan Liu,Xiaoxuan Liu,Zhengyu Yan,Zhengyu Yan,Shenghua Liao,Shenghua Liao +14 more
TL;DR: In this paper, an excellent biocompatible nitrogen-doped carbon dots (N-CDs) was successfully synthesized from orange juice and ethylenediamine by hydrothermal decomposition method.
References
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Journal ArticleDOI
Carbon Nanotubes--the Route Toward Applications
TL;DR: Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources; hydrogen storage media; and nanometer-sized semiconductor devices, probes, and interconnects.
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Journal ArticleDOI
Luminescent Carbon Nanodots: Emergent Nanolights
Sheila N. Baker,Gary A. Baker +1 more
TL;DR: This Review summarize recent advances in the synthesis and characterization of C-dots and speculate on their future and discuss potential developments for their use in energy conversion/storage, bioimaging, drug delivery, sensors, diagnostics, and composites.