SURFACTANT-FREE SYNTHESIS OF CARBON QUANTUM DOTS ADORNED COPPER OXIDE NANOCOMPOSITES AND THEIR PHOTOCATALYTIC ACTIVITY OF COMMERCIAL DYES BENEATH SUNLIGHT AND UV LIGHT SOURCES

2021 ◽  
Vol 15 ◽  
pp. 100427
Author(s):  
Muthulingam S. ◽  
Greeshma K.P. ◽  
Uthirakumar A.P. ◽  
Thamizselvi R.
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Copper Oxide ◽  
Uv Light ◽  
Carbon Quantum Dots ◽  
Light Sources

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.

Design and Fabrication of Carbon Quantum Dots/TiO2 Photonic Crystal Complex with Enhanced Photocatalytic Activity

2014 ◽  
Vol 14 (6) ◽  
pp. 4156-4163 ◽  
Author(s):  
Zhong Huang ◽  
Liang Fang ◽  
Wen Dong ◽  
Yang Liu ◽  
Zhenhui Kang
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Photonic Crystal ◽  
Carbon Quantum Dots ◽  
Crystal Complex

scholarly journals Researching CdZnS/ZnS (GT) Quantum Dots in Cathodoluminescent Mode

2019 ◽  
Vol 8 (9S2) ◽  
pp. 841-843
Keyword(s):  
Quantum Dots ◽  
Research And Development ◽  
Uv Light ◽  
Spectral Characteristics ◽  
Light Sources ◽  
Application Field ◽  
Medium Pressure

Application field of UV light sources is getting larger at the last decades. Among the most widespread are high and medium pressure vacuum lamps. But there currently is a trend of moving away from using mercury both in household applications and manufacturing. This creates a necessity to conduct research and development for UV sources made and operating without Hg. Cathodoluminescent UV sources are in this category. One of the possible ways to create a viable UV anode phosphor is using quantum dots with needed spectral characteristics.

Carbon quantum dots/Zn2+ ions doped-CdS nanowires with enhanced photocatalytic activity for reduction of 4-nitroaniline to p-phenylenediamine

2018 ◽  
Vol 450 ◽  
pp. 1-8 ◽  
Author(s):  
Yuan-Yuan Chai ◽  
De-Peng Qu ◽  
De-Kun Ma ◽  
Wei Chen ◽  
Shaoming Huang
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Carbon Quantum Dots ◽  
Cds Nanowires

Dandelion-like ZnS/carbon quantum dots hybrid materials with enhanced photocatalytic activity toward organic pollutants

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31551-31558 ◽  
Author(s):  
Fangwang Ming ◽  
Jinqing Hong ◽  
Xun Xu ◽  
Zhoucheng Wang
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Hybrid Materials ◽  
Carbon Quantum Dots

Facile one-step synthesis of cerium oxide-carbon quantum dots/RGO nanohybrid catalyst and its enhanced photocatalytic activity

2017 ◽  
Vol 43 (3) ◽  
pp. 3072-3079 ◽  
Author(s):  
Ramanujam Kannan ◽  
Ae Rhan Kim ◽  
Seong Kug Eo ◽  
Seong Ho Kang ◽  
Dong Jin Yoo
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Cerium Oxide ◽  
Carbon Quantum Dots ◽  
One Step

Bamboo prepared carbon quantum dots (CQDs) for enhancing Bi3Ti4O12 nanosheets photocatalytic activity

2018 ◽  
Vol 752 ◽  
pp. 106-114 ◽  
Author(s):  
Tao Wang ◽  
Xiqing Liu ◽  
Changchang Ma ◽  
Zhi Zhu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Carbon Quantum Dots

Bi2O3/Carbon quantum dots heterostructured photocatalysts with enhanced photocatalytic activity

2017 ◽  
Vol 209 ◽  
pp. 220-223 ◽  
Author(s):  
Qinghe Que ◽  
Yonglei Xing ◽  
Zuoli He ◽  
Yawei Yang ◽  
Xingtian Yin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Carbon Quantum Dots
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