High and reversible oxygen uptake in carbon dot solutions generated from polyethylene facilitating reactant-enhanced solar light harvesting

Nanoscale ◽  
2020 ◽  
Vol 12 (19) ◽  
pp. 10480-10490
Author(s):  
Sanjit Mondal ◽  
Pitchiah E. Karthik ◽  
Lipipuspa Sahoo ◽  
Kaustav Chatterjee ◽  
M. Sathish ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Uptake ◽  
Light Harvesting ◽  
Carbon Quantum Dots ◽  
Oxygen Enrichment ◽  
Solar Light ◽  
Oxidation Reactions ◽  
Carbon Dot ◽  
Photo Oxidation

Carbon quantum dots obtained from polyethylene exhibit large oxygen enrichment properties in solution enabling catalytic photo-oxidation reactions without artificial oxygen enrichment.

scholarly journals PMMA Thin Film with Embedded Carbon Quantum Dots for Post-Fabrication Improvement of Light Harvesting in Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 291 ◽  
Author(s):  
Askar A. Maxim ◽  
Shynggys N. Sadyk ◽  
Damir Aidarkhanov ◽  
Charles Surya ◽  
Annie Ng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Fill Factor ◽  
Light Harvesting ◽  
Incident Light ◽  
Perovskite Solar Cells ◽  
Carbon Quantum Dots ◽  
Active Layers ◽  
Before And After ◽  
Down Conversion

Perovskite solar cells (PSCs) with a standard sandwich structure suffer from optical transmission losses due to the substrate and its active layers. Developing strategies for compensating for the losses in light harvesting is of significant importance to achieving a further enhancement in device efficiencies. In this work, the down-conversion effect of carbon quantum dots (CQDs) was employed to convert the UV fraction of the incident light into visible light. For this, thin films of poly(methyl methacrylate) with embedded carbon quantum dots (CQD@PMMA) were deposited on the illumination side of PSCs. Analysis of the device performances before and after application of CQD@PMMA photoactive functional film on PSCs revealed that the devices with the coating showed an improved photocurrent and fill factor, resulting in higher device efficiency.

scholarly journals Solar Light Harvesting N-Graphene Quantum Dots Decorated TiO2 for Enhanced Photocatalytic Activity

2018 ◽  
Vol 65 ◽  
pp. 05014
Author(s):  
Ping Feng Lim ◽  
Chen Hong Hak ◽  
Kah Hon Leong ◽  
Lan Ching Sim ◽  
Pichiah Saravanan
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Light Harvesting ◽  
Graphene Quantum Dots ◽  
Solar Light ◽  
Facile Hydrothermal Method ◽  
Sunlight Irradiation ◽  
Visible Light Range ◽  
Doped Graphene ◽  
Co Doped

N co-doped graphene quantum dots (N-GQDs) incorporated with nanocubic likes titanium dioxide (TiO2) are synthesized via facile hydrothermal method. The morphology features of the synthesized N-GQDs/TiO2 nanocomposites are seen to exhibited in cubic shape. The average lateral size of the synthesized nanocomposites is found to be ~5.1 nm. UV-Vis absorption spectra show vastly improvement in the visible light range when N-GQDs is introduced to TiO2. The photocatalytic activity clearly demonstrated its solar light harvesting capability of prepared nanocomposites by photodegrading 4-chlorophenol (4-CP) under sunlight irradiation.

scholarly journals Carbon Dots for Sensing and Killing Microorganisms

2019 ◽  
Vol 5 (2) ◽  
pp. 33 ◽  
Author(s):  
Fengming Lin ◽  
Yan-Wen Bao ◽  
Fu-Gen Wu
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Carbon Nanoparticles ◽  
Surface Passivation ◽  
Electronic Devices ◽  
Carbon Quantum Dots ◽  
Toxicity Profile ◽  
Carbon Dot ◽  
Underlying Mechanisms

Carbon dots (or carbon quantum dots) are small (less than 10 nm) and luminescent carbon nanoparticles with some form of surface passivation. As an emerging class of nanomaterials, carbon dots have found wide applications in medicine, bioimaging, sensing, electronic devices, and catalysis. In this review, we focus on the recent advancements of carbon dots for sensing and killing microorganisms, including bacteria, fungi, and viruses. Synthesis, functionalization, and a toxicity profile of these carbon dots are presented. We also discuss the underlying mechanisms of carbon dot-based sensing and killing of microorganisms.

Carbon Quantum Dots/Cu2O Heterostructures for Solar-Light-Driven Conversion of CO2to Methanol

2014 ◽  
Vol 5 (5) ◽  
pp. 1401077 ◽  
Author(s):  
Haitao Li ◽  
Xinyi Zhang ◽  
Douglas R. MacFarlane
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Solar Light

scholarly journals Single Atomically Anchored Cobalt on Carbon Quantum Dots as Efficient Photocatalysts for Visible Light-Promoted Oxidation Reactions

2019 ◽  
Vol 32 (2) ◽  
pp. 734-743 ◽  
Author(s):  
Qin Wang ◽  
Jin Li ◽  
Xianjun Tu ◽  
Hongbo Liu ◽  
Miao Shu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Carbon Quantum Dots ◽  
Oxidation Reactions

Generation of graphene quantum dots by the oxidative cleavage of graphene oxide using the oxone oxidant

2015 ◽  
Vol 39 (4) ◽  
pp. 2425-2428 ◽  
Author(s):  
Yonghun Shin ◽  
Jintaek Park ◽  
Daesun Hyun ◽  
Junghee Yang ◽  
Hyoyoung Lee
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Oxidative Cleavage ◽  
Oxidation Reactions ◽  
Facile Synthesis ◽  
Photo Oxidation

Facile synthesis of graphene quantum dots using an acid-free oxone oxidant and graphene oxide was successfully developed by sono- and photo-oxidation reactions.

Solar light driven photocatalytic degradation of levofloxacin using TiO2/carbon-dot nanocomposites

2018 ◽  
Vol 42 (9) ◽  
pp. 7445-7456 ◽  
Author(s):  
Shelja Sharma ◽  
Ahmad Umar ◽  
Surinder Kumar Mehta ◽  
Alex O. Ibhadon ◽  
Sushil Kumar Kansal
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Degradation ◽  
Carbon Dots ◽  
Sol Gel ◽  
Solar Light ◽  
Carbon Dot ◽  
Hydrothermal Methods

This paper reports the synthesis of TiO2 quantum dots, carbon dots (C-dots), and TiO2/C-dots using facile sol–gel and hydrothermal methods.

scholarly journals Fast, energy-efficient synthesis of luminescent carbon quantum dots

2014 ◽  
Vol 16 (5) ◽  
pp. 2566-2570 ◽  
Author(s):  
Yongsheng Li ◽  
Xiaoxia Zhong ◽  
Amanda E. Rider ◽  
Scott A. Furman ◽  
Kostya (Ken) Ostrikov
Keyword(s):  
Quantum Dots ◽  
Energy Efficient ◽  
Synthesis Method ◽  
Carbon Quantum Dots ◽  
Efficient Synthesis ◽  
Carbon Dot

A simple, fast, energy and labour efficient, carbon dot synthesis method involving only the mixing of a saccharide and base is presented.

Sign in / Sign up

Export Citation Format

Share Document