Sustainable synthesis of single crystalline sulphur-doped graphene quantum dots for bioimaging and beyond

2018 ◽  
Vol 20 (18) ◽  
pp. 4245-4259 ◽  
Author(s):  
Sujata Sangam ◽  
Apoorv Gupta ◽  
Adeeba Shakeel ◽  
Rohan Bhattacharya ◽  
Arun Kumar Sharma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Hydrothermal Route ◽  
Single Crystalline ◽  
Doped Graphene

Waste-driven single crystalline sulphur-doped GQDs are synthesized via a green hydrothermal route with the highest quantum yield and excellent biocompatibility for bioimaging.

scholarly journals The Synergistic Effect of Pyridinic Nitrogen and Graphitic Nitrogen of Nitrogen-Doped Graphene Quantum Dots for Enhanced TiO2 Nanocomposites’ Photocatalytic Performance

Catalysts ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 438 ◽  
Author(s):  
Fei Li ◽  
Ming Li ◽  
Yi Luo ◽  
Ming Li ◽  
Xinyu Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Graphene Quantum Dots ◽  
Hydrothermal Route ◽  
Ammonia Water ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Pyridinic N

In this study, nitrogen-doped graphene quantum dots (N-GQDs) and a TiO2 nanocomposite were synthesized using a simple hydrothermal route. Ammonia water was used as a nitrogen source to prepare the N-GQDs. When optically characterized by UV-vis, N-GQDs reveal stronger absorption peaks in the range of ultraviolet (UV) light than graphene quantum dots (GQDs). In comparison with GQDs/TiO2 and pure TiO2, the N-GQDs/TiO2 have significantly improved photocatalytic performance. In particular, it was found that, when the added amount of ammonia water was 50 mL, the content of pyridinic N and graphitic N were as high as 22.47% and 31.44%, respectively. Most important, the photocatalytic activity of N-GQDs/TiO2-50 was about 95% after 12 min. The results illustrated that pyridinic N and graphitic N play a significant role in photocatalytic performance.

Nitrogen-doped graphene quantum dots for 80% photoluminescence quantum yield for inorganic γ-CsPbI3 perovskite solar cells with efficiency beyond 16%

2019 ◽  
Vol 7 (10) ◽  
pp. 5740-5747 ◽  
Author(s):  
Hui Bian ◽  
Qian Wang ◽  
Siwei Yang ◽  
Changjie Yan ◽  
Haoran Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Perovskite Solar Cells ◽  
Nitrogen Doped ◽  
Photoluminescence Quantum Yield ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

N-GQDs with 80% PLQY are used as an EDS layer for γ-CsPbI3 PSCs, and attained a high PCE of 16.02%.

A general quantitative pH sensor developed with dicyandiamide N-doped high quantum yield graphene quantum dots

Nanoscale ◽  
2014 ◽  
Vol 6 (7) ◽  
pp. 3868-3874 ◽  
Author(s):  
Zhu Lian Wu ◽  
Ming Xuan Gao ◽  
Ting Ting Wang ◽  
Xiao Yan Wan ◽  
Lin Ling Zheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Citric Acid ◽  
Hydrothermal Synthesis ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Ph Sensor ◽  
Ph Sensitivity ◽  
High Quantum Yield ◽  
Photoluminescence Properties ◽  
Doped Graphene

Using citric acid and dicyandiamide, through a hydrothermal synthesis, we fabricated N-doped graphene quantum dots (GQDs), which possess excellent photoluminescence properties and pH sensitivity and developed a pH sensor for environmental and intracellular application.

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