Graphene quantum dots as novel and green nano-materials for the visible-light-driven photocatalytic degradation of cationic dye

2015 ◽  
Vol 409 ◽  
pp. 102-109 ◽  
Author(s):  
Mahmoud Roushani ◽  
Maryamosadat Mavaei ◽  
Hamid Reza Rajabi
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Graphene Quantum Dots ◽  
Cationic Dye ◽  
Nano Materials ◽  
Visible Light Driven

Synthesis of carbon quantum dot-surface modified P25 nanocomposites for photocatalytic degradation of p-nitrophenol and acid violet 43

RSC Advances ◽  
2014 ◽  
Vol 4 (58) ◽  
pp. 30605-30609 ◽  
Author(s):  
Fengying Zheng ◽  
Zhenhua Wang ◽  
Jie Chen ◽  
ShunXing Li
Keyword(s):  
Quantum Dots ◽  
Water Treatment ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Carbon Quantum Dots ◽  
Chemical Adsorption ◽  
Carbon Quantum Dot ◽  
Visible Light Driven ◽  
Surface Modified ◽  
Acid Violet

A new efficient and stable visible light driven photocatalyst, carbon quantum dots (CQDs)-surface modified P25 nanocomposite, was successfully prepared by chemical adsorption of CQDs onto the surface of TiO2 nanoparticles and then used for water treatment.

Visible-light-driven photocatalytic degradation of RhB by carbon-quantum-dot-modified g-C3N4 on carbon cloth

CrystEngComm ◽  
2021 ◽  
Author(s):  
Bolin Zhu ◽  
Xuefei Li ◽  
Yue Wang ◽  
Na Liu ◽  
Ye Tian ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Water Purification ◽  
Carbon Nitride ◽  
Carbon Quantum Dots ◽  
Carbon Cloth ◽  
Carbon Quantum Dot ◽  
Visible Light Driven

Highly efficient semiconductor photocatalysis technology is widely used for water purification. Herein, we prepared carbon quantum dots (CQDs)/graphitic carbon nitride (g-C3N4) on carbon cloth (CC). After the addition of CQDs,...

Visible light driven photocatalytic degradation of fluoroquinolone levofloxacin drug using Ag2O/TiO2 quantum dots: a mechanistic study and degradation pathway

2017 ◽  
Vol 41 (20) ◽  
pp. 12079-12090 ◽  
Author(s):  
Amandeep Kaur ◽  
Deepak B. Salunke ◽  
Ahmad Umar ◽  
Surinder Kumar Mehta ◽  
A. S. K. Sinha ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Degradation Pathway ◽  
Mechanistic Study ◽  
Visible Light Driven

Ag2O/TiO2 QDs exhibited a photocatalytic activity of 81% for the degradation of levofloxacin under visible light, which is higher than those of commercially available catalysts.

scholarly journals Visible-Light Driven TiO2 Photocatalyst Coated with Graphene Quantum Dots of Tunable Nitrogen Doping

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 344 ◽  
Author(s):  
Xiong Sun ◽  
Hui-Jun Li ◽  
Nanquan Ou ◽  
Bowen Lyu ◽  
Bojie Gui ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Light Emission ◽  
Graphene Quantum Dots ◽  
Visible Light Absorption ◽  
Visible Light Driven ◽  
Nitrogen Doped Graphene

Nitrogen doped graphene quantum dots (NGQDs) were successfully prepared via a hydrothermal method using citric acid and urea as the carbon and nitrogen precursors, respectively. Due to different post-treatment processes, the obtained NGQDs with different surface modifications exhibited blue light emission, while their visible-light absorption was obviously different. To further understand the roles of nitrogen dopants and N-containing surface groups of NGQDs in the photocatalytic performance, their corresponding composites with TiO2 were utilized to degrade RhB solutions under visible-light irradiation. A series of characterization and photocatalytic performance tests were carried out, which demonstrated that NGQDs play a significant role in enhancing visible-light driven photocatalytic activity and the carrier separation process. The enhanced photocatalytic activity of the NGQDs/TiO2 composites can possibly be attributed to an enhanced visible light absorption ability, and an improved separation and transfer rate of photogenerated carriers.

Construction of nitrogen-doped graphene quantum dots-BiVO4/g-C3N4Z-scheme photocatalyst and enhanced photocatalytic degradation of antibiotics under visible light

RSC Advances ◽  
2016 ◽  
Vol 6 (66) ◽  
pp. 61162-61174 ◽  
Author(s):  
Ming Yan ◽  
Fangfang Zhu ◽  
Wei Gu ◽  
Lin Sun ◽  
Weidong Shi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Environmental Remediation ◽  
Graphene Quantum Dots ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

In this study, an effective nitrogen-doped graphene quantum dots (NGQDs)-BiVO4/g-C3N4Z-scheme heterojunction has been successfully prepared for environmental remediation.

Visible light driven photocatalytic degradation of organic pollutants via carbon quantum dots/TiO2

2021 ◽  
Author(s):  
Kunjie Wang ◽  
lei liang ◽  
Yi Zheng ◽  
Hongxia Li ◽  
Xiaohui Niu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Source ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Hydrothermal Treatment ◽  
Organic Pollutants ◽  
Carbon Quantum Dots ◽  
Olive Leaf ◽  
Visible Light Driven

Using olive leaf as the carbon source, carbon quantum dots (CQDs) with up-conversion luminescence were prepared via reflux method. Through a hydrothermal treatment, CQDs were loaded up on the surface...

Quantum-confined bandgap narrowing of TiO2 nanoparticles by graphene quantum dots for visible-light-driven applications

2016 ◽  
Vol 52 (59) ◽  
pp. 9208-9211 ◽  
Author(s):  
Shujun Wang ◽  
Ivan S. Cole ◽  
Qin Li
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Graphene Quantum Dots ◽  
Visible Light Range ◽  
Bandgap Narrowing ◽  
Uv Absorbers ◽  
Visible Light Driven ◽  
Quantum Confined ◽  
First Time

We for the first time report a quantum-confined bandgap narrowing mechanism through which the absorption of two UV absorbers, namely the graphene quantum dots (GQDs) and TiO2 nanoparticles, can be easily extended into the visible light range in a controllable manner.

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