scholarly journals Spectrophotofluorometric Study of Amaranth with Fluorescent Carbon Dots and its Analytical Application

2021 ◽  
Vol 33 (9) ◽  
pp. 2015-2020
Author(s):  
Amandeep Kaur ◽  
Usha Gupta
Keyword(s):  
Aqueous Solution ◽  
Carbon Source ◽  
Carbon Dots ◽  
Present Method ◽  
Hydrothermal Carbonization ◽  
Time Period ◽  
Fluorescent Carbon Dots ◽  
Effect Time ◽  
Fluorescent Carbon

Hydrothermal carbonization of bottle gourd as the carbon source has been performed to synthesize fluorescent carbon dots . The carbon dots were formed in the form of yellow brown aqueous solution, soluble in water and stable towards light. Characterization of fluorescent carbon dots was done using TEM, UV-vis and fluorescence spectroscopy. Spectrophotofluorometric method has been followed for the study of common food colorant Amaranth present in foodstuffs using fluorescent carbon dots. Conditions optimized during analysis were reaction pH, concentration of Amaranth, concentration of C-dots, thermal effect, time period, etc. Results showed that Amaranth could result in fluorescence quenching of carbon dots due to interaction of surface –COOH, –SO3H group with Amaranth dye. The present method offers good linear range of 0.20-25.0 μM with LOD 0.019 μM and highly selective and therefore, method have been applied successfully for the detection of Amaranth in foodstuffs.

Nitrogen-doped carbon dots from Hutai-8 grape skin and their application in Hg2+ detection

2020 ◽  
Vol 16 ◽  
Author(s):  
Pan Zhang ◽  
Shun-Sheng Zhao ◽  
JiaJia Wang ◽  
Xiang Rong Liu
Keyword(s):  
Heavy Metal ◽  
Carbon Source ◽  
Fluorescence Quenching ◽  
Hydrothermal Method ◽  
Water Samples ◽  
Carbon Dots ◽  
Mercury Ions ◽  
Grape Skin ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Background: In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+ . Objective: Using grape skin as a green and environmental friendly carbon source, to synthesize fluorescent carbon dots, and try to apply them to the detect the concentration of Hg2+ in water. Method: Using "Hutai No. 8" grape skin as carbon source, fluorescent carbon dots were synthesized by one-step hydrothermal method. Structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD and other characterization instruments, and their utilization on detection of mercury ions in the actual water samples was explored. Results: The CDs had a particle size of about 4.8 nm and a spherical shape. There are N-H, C-N, C=O and other functional groups on the surface. It was found that Hg2+ has obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+ was established, and the detection limit is 3.7 μM, which could be applied to test the concentration of Hg2+ in water samples. Conclusion: Using grape skin as carbon source, fluorescent carbon dots were successfully synthesized by hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.

Facile synthesis of fluorescent carbon dots using watermelon peel as a carbon source

2012 ◽  
Vol 66 (1) ◽  
pp. 222-224 ◽  
Author(s):  
Jiaojiao Zhou ◽  
Zonghai Sheng ◽  
Heyou Han ◽  
Mingqiang Zou ◽  
Chenxu Li
Keyword(s):  
Carbon Source ◽  
Carbon Dots ◽  
Facile Synthesis ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

scholarly journals Reed-derived fluorescent carbon dots as highly selective probes for detecting Fe3+ and excellent cell-imaging agents

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21715-21723 ◽  
Author(s):  
Guili Wei ◽  
Ziqiang Zhao ◽  
Jie Du ◽  
Pan Li ◽  
Zhuxing Sun ◽  
...  
Keyword(s):  
Carbon Source ◽  
Fluorescent Probe ◽  
Carbon Dots ◽  
Cell Imaging ◽  
Hydrothermal Process ◽  
Imaging Agents ◽  
Fluorescent Carbon Dots ◽  
Simple Hydrothermal Process ◽  
Fluorescent Carbon

A highly selective and sensitive fluorescent probe for detecting Fe3+, carbon dots (CDs), was prepared with renewable reed naturally containing C, N, O, and S elements as a green and eco-friendly carbon source by a simple hydrothermal process.

scholarly journals High fluorescent carbon dots/Ag as a sensitive sensor for tetracycline waste in aqueous solution

2021 ◽  
Vol 1943 (1) ◽  
pp. 012012
Author(s):  
I Alkian ◽  
H Sutanto ◽  
H Hadiyanto ◽  
E Hidayanto ◽  
H P Hapsari ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Carbon Dots ◽  
Sensitive Sensor ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

scholarly journals Acid-assisted hydrothermal synthesis of red fluorescent carbon dots for sensitive detection of Fe(iii)

RSC Advances ◽  
2017 ◽  
Vol 7 (65) ◽  
pp. 40952-40956 ◽  
Author(s):  
Chunlin Tan ◽  
Xiuya Su ◽  
Chao Zhou ◽  
Baoju Wang ◽  
Qiuqiang Zhan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Hydrothermal Synthesis ◽  
Carbon Dots ◽  
Hydrothermal Reaction ◽  
Sensitive Detection ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Red-emitting carbon dots (C-dots) were synthesized from p-phenylenediamine (p-PD) aqueous solution with nitric acid (HNO3) assistance by hydrothermal reaction at 200 °C for 2 h.

scholarly journals Highly fluorescent carbon dots as an efficient nanoprobe for detection of clomifene citrate

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 6084-6093 ◽  
Author(s):  
Yi Zhang ◽  
Zhiyong Gao ◽  
Xue Yang ◽  
Genqing Yang ◽  
Jiuli Chang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Hydrothermal Carbonization ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Highly fluorescent carbon dots (CDs) were synthesized through facile hydrothermal carbonization and ethylenediamine passivation of an easily available prawn shell precursor.

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