Selective and high-sensitive label-free detection of ascorbic acid by carbon nitride quantum dots with intense fluorescence from lone pair states

Talanta ◽  
2019 ◽  
Vol 196 ◽  
pp. 530-536 ◽  
Author(s):  
Hangqing Xie ◽  
Yao Fu ◽  
Qizhen Zhang ◽  
Kun Yan ◽  
Run Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Carbon Nitride ◽  
Lone Pair ◽  
Label Free ◽  
Intense Fluorescence ◽  
Label Free Detection

scholarly journals Biomass-derived Carbon Quantum Dots for Visible-Light-Induced Photocatalysis and Label-Free Detection of Fe(III) and Ascorbic acid

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Gouri Sankar Das ◽  
Jong Pil Shim ◽  
Amit Bhatnagar ◽  
Kumud Malika Tripathi ◽  
TaeYoung Kim
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Visible Light ◽  
Fluorescence Emission ◽  
Carbon Quantum Dots ◽  
Active Species ◽  
Label Free ◽  
One Pot ◽  
Label Free Detection ◽  
Visible Light Driven

Abstract Visible-light-driven photocatalysts prepared using renewable resources are crucial but challenging to develop for the efficient degradation of organic pollutants, which is required to solve ever-increasing water deterioration issues. In this study, we report a visible-light-responsive photocatalyst for the efficient degradation of methylene blue (MB) as a model pollutant dye. Green-emissive carbon quantum dots (CQDs) were synthesized from pear juice via a facile, scalable, one-pot solvothermal process. The as-synthesized CQDs exhibit superior photocatalytic activity under visible-light irradiation owing to their efficient light absorption, electron transfer, and separation of photogenerated charge carriers, facilitating ~99.5% degradation of MB within 130 min. A possible mechanism for the photocatalysis is proposed on the basis of comprehensive active species trapping experiments. Furthermore, the CQDs were used in a specific sensitive assay for Fe(III) and ascorbic acid (AA), even with interference from other metal ions. The fluorescence emission of CQDs was “turned off” specifically upon binding of Fe(III) and “turned on” with AA. The prepared CQDs represent efficient photocatalysts and fluorescent probes that are not restricted by toxicity, cost, or lack of scalability.

H2O2-sensitive quantum dots for the label-free detection of glucose

Talanta ◽  
2010 ◽  
Vol 82 (3) ◽  
pp. 997-1002 ◽  
Author(s):  
Mei Hu ◽  
Jing Tian ◽  
Hao-Ting Lu ◽  
Li-Xing Weng ◽  
Lian-Hui Wang
Keyword(s):  
Quantum Dots ◽  
Label Free ◽  
Label Free Detection

One-step hydrothermal synthesis of down/up-conversion luminescence F-doped carbon quantum dots for label-free detection of Fe3+

2019 ◽  
Vol 151 ◽  
pp. 104217 ◽  
Author(s):  
Dan Hong ◽  
Xiaoyan Deng ◽  
Jiaman Liang ◽  
Jiayu Li ◽  
Yi Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrothermal Synthesis ◽  
Carbon Quantum Dots ◽  
Label Free ◽  
Label Free Detection ◽  
One Step

Biogenic Quantum Dots for Sensitive, Label-Free Detection of Mercury Ions

2019 ◽  
Vol 2 (6) ◽  
pp. 2661-2667 ◽  
Author(s):  
Li-Jiao Tian ◽  
Yuan Min ◽  
Xue-Meng Wang ◽  
Jie-Jie Chen ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Label Free ◽  
Mercury Ions ◽  
Label Free Detection

Bio-friendly Maillard reaction fluorescent products from glutathione and ascorbic acid for the rapid and label-free detection of Fe3+in living cells

2017 ◽  
Vol 5 (4) ◽  
pp. 707-713 ◽  
Author(s):  
Jiang Xue Dong ◽  
Zi Li Wang ◽  
Yue Yang ◽  
Zhong Feng Gao ◽  
Bang Lin Li ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Maillard Reaction ◽  
Living Cells ◽  
Label Free ◽  
Imaging Probe ◽  
Label Free Detection ◽  
Fluorescent Products

Non-cytotoxic Maillard reaction fluorescent products were used as an imaging probe for Fe3+detection in living cells.

High sensitivity label-free detection of Fe3+ ion in aqueous solution using fluorescent MoS2 quantum dots

2019 ◽  
Vol 281 ◽  
pp. 989-997 ◽  
Author(s):  
Jian Ma ◽  
Haihu Yu ◽  
Xin Jiang ◽  
Zhuozhao Luo ◽  
Yu Zheng
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
High Sensitivity ◽  
Label Free ◽  
Label Free Detection

Selective, Sensitive and Label-Free Detection of Fe3+ Ion in Tap Water Using Highly Fluorescent Graphene Quantum Dots

2019 ◽  
Vol 29 (3) ◽  
pp. 541-548 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Xiangyue Yang ◽  
Yunxun Pu ◽  
Wei Cheng ◽  
Song Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Tap Water ◽  
Graphene Quantum Dots ◽  
Label Free ◽  
Label Free Detection

scholarly journals Nanospace-confined preparation of uniform nitrogen-doped graphene quantum dots for highly selective fluorescence dual-function determination of Fe3+ and ascorbic acid

RSC Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 5500-5508 ◽  
Author(s):  
Hongbo Xu ◽  
Shenghai Zhou ◽  
Jinyu Liu ◽  
Yajun Wei
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Mesoporous Silica ◽  
Graphene Quantum Dots ◽  
Dual Function ◽  
Label Free ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nanospace-confined synthesis of N-GQDs was successfully achieved via a mesoporous silica recycling and vapor cutting route for label-free fluorescence dual-function detection of Fe3+ and AA.

Boron nitride quantum dots as electrochemiluminescence coreactants of rGO@Au@Ru–SiO2 for label-free detection of AFP in human serum

2020 ◽  
Vol 335 ◽  
pp. 135621 ◽  
Author(s):  
Dongmiao Qin ◽  
Xiaohua Jiang ◽  
Guichun Mo ◽  
Jinsu Feng ◽  
Biyang Deng
Keyword(s):  
Quantum Dots ◽  
Boron Nitride ◽  
Human Serum ◽  
Label Free ◽  
Label Free Detection
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