Journal ArticleDOI
Upconversion and downconversion fluorescent graphene quantum dots: ultrasonic preparation and photocatalysis.
TLDR
A facile ultrasonic route for the fabrication of graphene quantum dots (GQDs) with upconverted emission is presented, and it is interesting that the photocatalytic rate of the rutile TiO(2)/GQD complex system is ca.Abstract:
A facile ultrasonic route for the fabrication of graphene quantum dots (GQDs) with upconverted emission is presented. The as-prepared GQDs exhibit an excitation-independent downconversion and upconversion photoluminescent (PL) behavior, and the complex photocatalysts (rutile TiO(2)/GQD and anatase TiO(2)/GQD systems) were designed to harness the visible spectrum of sunlight. It is interesting that the photocatalytic rate of the rutile TiO(2)/GQD complex system is ca. 9 times larger than that of the anatase TiO(2)/GQD complex under visible light (λ > 420 nm) irradiation in the degradation of methylene blue.read more
Citations
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Journal ArticleDOI
Highly Photoluminescent Carbon Dots for Multicolor Patterning, Sensors, and Bioimaging
Shoujun Zhu,Qingnan Meng,Lei Wang,Junhu Zhang,Yubin Song,Han Jin,Kai Zhang,Hongchen Sun,Hai-Yu Wang,Bai Yang +9 more
TL;DR: A facile and highoutput strategy for the fabrication of CDs, which is suitable for industrial-scale production and is almost equal to fluorescent dyes, is discussed.
Journal ArticleDOI
Carbon nanodots: synthesis, properties and applications
TL;DR: In this article, a review of the photo and electron properties of carbon nanodots is presented to provide further insight into their controversial emission origin and to stimulate further research into their potential applications, especially in photocatalysis, energy conversion, optoelectronics, and sensing.
Journal ArticleDOI
Glowing Graphene Quantum Dots and Carbon Dots: Properties, Syntheses, and Biological Applications
TL;DR: The properties and synthesis methods of these carbon nanodots are reviewed and emphasis is placed on their biological (both fundamental and theranostic) applications.
Journal ArticleDOI
Broad family of carbon nanoallotropes: classification, chemistry, and applications of fullerenes, carbon dots, nanotubes, graphene, nanodiamonds, and combined superstructures.
TL;DR: Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined Superstructures.
Journal ArticleDOI
Focusing on luminescent graphene quantum dots: current status and future perspectives
TL;DR: In this review, the state-of-the-art knowledge of GQDs is presented, with emphasis on the top-down routes which possess the advantages of abundant raw materials, large scale production and simple operation.
References
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Journal ArticleDOI
Graphene: Status and Prospects
TL;DR: This review analyzes recent trends in graphene research and applications, and attempts to identify future directions in which the field is likely to develop.
Journal ArticleDOI
Hydrothermal route for cutting graphene sheets into blue-luminescent graphene quantum dots
TL;DR: This work reports on a novel and simple hydrothermal approach for the cutting of GSs into surface-functionalized GQDs, which were found to exhibit bright blue photoluminescence (PL), which has never been observed in GSs and GNRs owing to their large lateral sizes.
Journal ArticleDOI
Photocatalytic degradation pathway of methylene blue in water
Ammar Houas,Hinda Lachheb,Hinda Lachheb,Mohamed Ksibi,Elimame Elaloui,Chantal Guillard,Jean-Marie Herrmann +6 more
TL;DR: In this article, the TiO2/UV photocatalytic degradation of methylene blue (MB) has been investigated in aqueous heterogeneous suspensions, and it has been shown that the degradation pathway can be determined by a careful identification of intermediate products, in particular aromatics, whose successive hydroxylations lead to the aromatic ring opening.
Journal ArticleDOI
Water‐Soluble Fluorescent Carbon Quantum Dots and Photocatalyst Design
Haitao Li,Xiaodie He,Zhenhui Kang,Zhenhui Kang,Hui Huang,Yang Liu,Yang Liu,Jinglin Liu,Suoyuan Lian,Chi Him A. Tsang,Xiao-Bao Yang,Shuit-Tong Lee +11 more
TL;DR: The facile one-step alkali-assisted electrochemical fabrication of CQDs with sizes of 1.2– 3.8 nm which possess size-dependent photoluminescence (PL) and excellent upconversion luminescence properties are reported and the design of photocatalysts is demonstrated to harness the use of the full spectrum of sunlight.
Journal ArticleDOI
Chaotic Dirac billiard in graphene quantum dots.
Leonid Ponomarenko,Fred Schedin,Mikhail I. Katsnelson,R. Yang,Ernie W. Hill,Kostya S. Novoselov,A. K. Geim +6 more
TL;DR: This work reports on electron transport in quantum dot devices carved entirely from graphene, demonstrating the possibility of molecular-scale electronics based on graphene.
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