Impregnation of Graphene Quantum Dots into a Metal–Organic Framework to Render Increased Electrical Conductivity and Activity for Electrochemical Sensing

2019 ◽  
Vol 11 (38) ◽  
pp. 35319-35326 ◽  
Author(s):  
Yu-Chuan Chen ◽  
Wei-Hung Chiang ◽  
Darwin Kurniawan ◽  
Pei-Chun Yeh ◽  
Ken-ichi Otake ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Quantum Dots ◽  
Metal Organic Framework ◽  
Graphene Quantum Dots ◽  
Electrochemical Sensing ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Porous carbon derived from metal–organic framework@graphene quantum dots as electrode materials for supercapacitors and lithium-ion batteries

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9577-9583 ◽  
Author(s):  
Hui Yu ◽  
Wenjian Zhu ◽  
Hu Zhou ◽  
Jianfeng Liu ◽  
Zhen Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lithium Ion Batteries ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Metal Organic Framework ◽  
Graphene Quantum Dots ◽  
Lithium Ion ◽  
Simple Method ◽  
Metal Organic ◽  
Organic Framework

The C@GQD composite was prepared by the combination of metal–organic framework (ZIF-8)-derived porous carbon and graphene quantum dots (GQDs) by a simple method.

Synthesis of graphene quantum dot/metal–organic framework nanocomposites as yellow phosphors for white light-emitting diodes

2018 ◽  
Vol 42 (7) ◽  
pp. 5083-5089 ◽  
Author(s):  
Dengyu Pan ◽  
Lijun Wang ◽  
Zhen Li ◽  
Bijiang Geng ◽  
Chen Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
White Light ◽  
Metal Organic Framework ◽  
Graphene Quantum Dots ◽  
Light Emitting ◽  
Graphene Quantum Dot ◽  
Metal Organic ◽  
White Light Emitting Diodes ◽  
Organic Framework

Graphene quantum dots (GQDs) and a metal–organic framework were assembled to form a nanocomposite for solving the GQDs’ fluorescence quenching problem in WLEDs.

Boosting the energy storage densities of supercapacitors by incorporating N-doped graphene quantum dots into cubic porous carbon

Nanoscale ◽  
2018 ◽  
Vol 10 (48) ◽  
pp. 22871-22883 ◽  
Author(s):  
Zhen Li ◽  
Fan Bu ◽  
Junjie Wei ◽  
Weiwei Yao ◽  
Liang Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Storage ◽  
Electrode Material ◽  
Porous Carbon ◽  
Metal Organic Framework ◽  
Graphene Quantum Dots ◽  
Doped Graphene ◽  
Metal Organic ◽  
Organic Framework

Hierarchical N-doped porous carbon has been prepared by assembling N-doped graphene quantum dots (N-GQDs) onto a carbonized metal–organic framework (cMOF-5) and used as an electrode material for supercapacitors.

scholarly journals Construction of Silver Quantum Dot Immobilized Zn-MOF-8 Composite for Electrochemical Sensing of 2,4-Dinitrotoluene

2019 ◽  
Vol 9 (22) ◽  
pp. 4952 ◽  
Author(s):  
Sushma Rani ◽  
Bharti Sharma ◽  
Shivani Kapoor ◽  
Rajesh Malhotra ◽  
Rajender S. Varma ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Limit Of Detection ◽  
Metal Organic Framework ◽  
Linear Sweep Voltammetry ◽  
Electrochemical Sensing ◽  
Amperometric Determination ◽  
Transmission Electron ◽  
Electro Catalysis ◽  
Metal Organic ◽  
Organic Framework

In the present study, we report a highly effective electrochemical sensor for detecting 2,4-dinitrotoluene (2,4-DNT). The amperometric determination of 2,4-DNT was carried out using a gold electrode modified with zinc–metal organic framework-8 and silver quantum dot (Zn-MOF-8@AgQDs) composite. The synthesized nanomaterials were characterized by using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The synthesized nanocomposite proved to be efficient in electro-catalysis thereby reducing the 2,4-DNT. The unique combination present in Zn-MOF-8@AgQDs composite offered an excellent conductivity and large surface area enabling the fabrication of a highly sensitive (−0.238 µA µM−1 cm−2), selective, rapid and stable 2,4-DNT sensor. The dynamic linear range and limit of detection (LOD) was about 0.0002 µM to 0.9 µM and 0.041 µM, respectively. A 2,4-DNT reduction was also observed during the linear sweep voltammetry (LSV) experiments with reduction peaks at −0.49 V and −0.68 V. This is an unprecedented report with metal organic framework (MOF) composite for sensing 2,4-DNT. In addition, the presence of other species such as thiourea, urea, ammonia, glucose, and ascorbic acid displayed no interference in the modified electrode suggesting its practicability in various environmental applications.

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