scholarly journals Green synthesis of carbon quantum dots embedded onto titanium dioxide nanowires for enhancing photocurrent

2017 ◽  
Vol 4 (5) ◽  
pp. 161051 ◽  
Author(s):  
Yin-Cheng Yen ◽  
Chia-Chi Lin ◽  
Ping-Yu Chen ◽  
Wen-Yin Ko ◽  
Tzu-Rung Tien ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Uv Light ◽  
Pure Water ◽  
Reduction Process ◽  
Photocurrent Density ◽  
Carbon Quantum Dots ◽  
Light Illumination ◽  
Paramagnetic Resonance ◽  
One Step

The green synthesis of nanowired photocatalyst composed of carbon quantum dots-titanium hybrid-semiconductors, CQDs/TiO 2 , are reported. Where graphite-based CQDs with a size less than 5 nm are directly synthesized in pure water electrolyte by a one-step electrochemistry approach and subsequently electrodeposited onto as-prepared TiO 2 nanowires through a voltage-driven reduction process. Electron paramagnetic resonance studies show that the CQDs can generate singlet oxygen and/or oxygen radicals to decompose the kinetic H 2 O 2 intermediate species upon UV light illumination. With the effect of peroxidase-like CQDs, photocurrent density of CQDs/TiO 2 is remarkably enhanced by a 6.4 factor when compared with that of as-prepared TiO 2 .

scholarly journals One-step and green synthesis of nitrogen-doped carbon quantum dots for multifunctional electronics

RSC Advances ◽  
2017 ◽  
Vol 7 (35) ◽  
pp. 21969-21973 ◽  
Author(s):  
Zhan Wang ◽  
Lijun Cao ◽  
Yamei Ding ◽  
Rui Shi ◽  
Xiangjing Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Carbon Quantum Dots ◽  
Limiting Behavior ◽  
Nitrogen Doped ◽  
Current Limiting ◽  
One Step ◽  
Nitrogen Doped Carbon

A facile one-step and green synthesis of nitrogen-doped CQDs has been developed, the N-doped CQD-based device exhibits multifunctional memory and current limiting behavior.

scholarly journals A simple and green synthesis of carbon quantum dots from coke for white light-emitting devices

RSC Advances ◽  
2019 ◽  
Vol 9 (58) ◽  
pp. 33789-33793 ◽  
Author(s):  
Xiaoting Feng ◽  
Yi Zhang
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
White Light ◽  
Carbon Quantum Dots ◽  
Light Illumination ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
White Light Illumination

CQDs are prepared from coke. The coke-based CQDs as a converter are applied to the white light illumination field.

ONE STEP GREEN SYNTHESIS OF CARBON QUANTUM DOTS AND ITS APPLICATION TOWARDS THE BIOELECTROANALYTICAL AND BIOLABELING STUDIES

2015 ◽  
Vol 182 ◽  
pp. 588-595 ◽  
Author(s):  
Rayammarakkar M. Shereema ◽  
Vandana Sankar ◽  
K.G Raghu ◽  
Talasila P. Rao ◽  
S.Sharath Shankar
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Carbon Quantum Dots ◽  
One Step

A sustainable green synthesis of functionalized biocompatible carbon quantum dots from Aloe barbadensis miller and its multifunctional applications

2021 ◽  
pp. 111414
Author(s):  
Jalaja Prasad Malavika ◽  
Chellappan Shobana ◽  
Murugesan Ragupathi ◽  
Ponnuchamy Kumar ◽  
Yun Sung Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Carbon Quantum Dots ◽  
Aloe Barbadensis

scholarly journals Formation of Carbon Quantum Dots via Hydrothermal Carbonization: Investigate the Effect of Precursors

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 986
Author(s):  
Md Rifat Hasan ◽  
Nepu Saha ◽  
Thomas Quaid ◽  
M. Toufiq Reza
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Microcrystalline Cellulose ◽  
Uv Light ◽  
Synthesis Method ◽  
Hydrothermal Carbonization ◽  
Carbon Quantum Dots ◽  
Medical Diagnostics ◽  
Particle Size Range ◽  
Wide Range

Carbon quantum dots (CQDs) are nanomaterials with a particle size range of 2 to 10 nm. CQDs have a wide range of applications such as medical diagnostics, bio-imaging, biosensors, coatings, solar cells, and photocatalysis. Although the effect of various experimental parameters, such as the synthesis method, reaction time, etc., have been investigated, the effect of different feedstocks on CQDs has not been studied yet. In this study, CQDs were synthesized from hydroxymethylfurfural, furfural, and microcrystalline cellulose via hydrothermal carbonization at 220 °C for 30 min of residence time. The produced CQDs showed green luminescence behavior under the short-wavelength UV light. Furthermore, the optical properties of CQDs were investigated using ultraviolet-visible spectroscopy and emission spectrophotometer, while the morphology and chemical bonds of CQDs were investigated using transmission electron microscopy and Fourier-transform infrared spectroscopy, respectively. Results showed that all CQDs produced from various precursors have absorption and emission properties but these optical properties are highly dependent on the type of precursor. For instance, the mean particle sizes were 6.36 ± 0.54, 5.35 ± 0.56, and 3.94 ± 0.60 nm for the synthesized CQDs from microcrystalline cellulose, hydroxymethylfurfural, and furfural, respectively, which appeared to have similar trends in emission intensities. In addition, the synthesized CQDs experienced different functionality (e.g., C=O, O-H, C-O) resulting in different absorption behavior.

Good's buffer derived highly emissive carbon quantum dots: excellent biocompatible anticancer drug carrier

2016 ◽  
Vol 4 (14) ◽  
pp. 2412-2420 ◽  
Author(s):  
Aneeya K. Samantara ◽  
Santanu Maji ◽  
Arnab Ghosh ◽  
Bamaprasad Bag ◽  
Rupesh Dash ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Anticancer Drug ◽  
Drug Carrier ◽  
Carbon Quantum Dots ◽  
One Step

A facile one-step approach has been developed for the synthesis of carbon quantum dots (CQDs) from Good’s buffer.

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