scholarly journals Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1655 ◽  
Author(s):  
Libing Wang ◽  
Chongning Li ◽  
Yanghe Luo ◽  
Zhiliang Jiang
Keyword(s):  
Catalytic Activity ◽  
Detection Limit ◽  
Gold Nanoparticle ◽  
Carbon Dots ◽  
Fluorescence Methods ◽  
Doped Carbon Dots ◽  
Sers Intensity ◽  
Excellent Stability

Carbon dots (CD) have excellent stability and fluorescence activity, and have been widely used in fluorescence methods. However, there are no reports about using CD as catalysts to amplify SERS signals to detect trace sulfate. Thus, preparing CD catalysts and their application in SERS sulfate-sensing are significant. In this article, highly catalytic N-doped carbon dots (CDN) were prepared by a hydrothermal procedure. CDN exhibited strong catalysis of the gold nanoparticle (AuNP) reaction between HAuCl4 and H2O2. Vitoria blue 4R (VB4R) has a strong SERS peak at 1614 cm−1 in the formed AuNP sol substrate. When Ba2+ ions were added, they were adsorbed on a CDN surface to inhibit the CDN catalytic activity that caused the SERS peak decreasing. Upon addition of analyte SO42−, a reaction with Ba2+ produced stable BaSO4 precipitate and CDN, and its catalysis recovered to cause SERS intensity increasing linearly. Thus, an SERS method was developed for the detection of 0.02–1.7 μmol/L SO42−, with a detection limit of 0.007 μmol/L.

scholarly journals Using N-doped Carbon Dots Prepared Rapidly by Microwave Digestion as Nanoprobes and Nanocatalysts for Fluorescence Determination of Ultratrace Isocarbophos with Label-Free Aptamers

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 223 ◽  
Author(s):  
Xin Li ◽  
Xin Jiang ◽  
Qingye Liu ◽  
Aihui Liang ◽  
Zhiliang Jiang
Keyword(s):  
Catalytic Activity ◽  
Detection Limit ◽  
Fluorescent Probe ◽  
Carbon Dots ◽  
Rapid Determination ◽  
Microwave Digestion ◽  
Label Free ◽  
Laser Scattering ◽  
Doped Carbon Dots

The strongly fluorescent and highly catalytic N-doped carbon dots (CDN) were rapidly prepared by a microwave irradiation procedure and were characterized by electron microscopy (EM), laser scattering, infrared spectroscopy (IR), and by their fluorescence spectrum. It was found that the CDN had a strong catalytic effect on the fluorescence reaction of 3,3′,5,5′-tetramethylbenzidine hydroxide ((TMB)–H2O2) which produced the oxidation product of TMB (TMBOX) with strong fluorescence at 406 nm. The aptamer (Apt) was adsorbed on the CDN surfaces which weakened the fluorescence intensity due to the inhibition of catalytic activity. When the target molecule isocarbophos (IPS) was added, it reacted with the Apt to form a stable conjugate and free CDN which restored the catalytic activity to enhance the fluorescence. Using TMBOX as a fluorescent probe, a highly sensitive nanocatalytic method for determination of 0.025–1.5 μg/L IPS was established with a detection limit of 0.015 μg/L. Coupling the CDN fluorescent probe with the Apt–IPS reaction, a new CD fluorescence method was established for the simple and rapid determination of 0.25–1.5 μg/L IPS with a detection limit of 0.11 μg/L.

scholarly journals A novel fluorescent sensor based on sulfur and nitrogen co-doped carbon dots with excellent stability for selective detection of doxycycline in raw milk

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12827-12834 ◽  
Author(s):  
Jinping Song ◽  
Jing Li ◽  
Ziying Guo ◽  
Wen Liu ◽  
Qi Ma ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Raw Milk ◽  
Selective Detection ◽  
Sensitivity And Selectivity ◽  
Doped Carbon Dots ◽  
Co Doped ◽  
Excellent Stability

Sulfur and nitrogen co-doped carbon dots obtained from casein exhibited excellent sensitivity and selectivity for the detection of doxycycline.

Highly efficient synthesis of N-doped carbon dots with excellent stability through pyrolysis method

2019 ◽  
Vol 54 (13) ◽  
pp. 9372-9384 ◽  
Author(s):  
Chen’ao Ma ◽  
Chaoshun Yin ◽  
Yujuan Fan ◽  
Xingfa Yang ◽  
Xingping Zhou
Keyword(s):  
Carbon Dots ◽  
Efficient Synthesis ◽  
Highly Efficient ◽  
Pyrolysis Method ◽  
Doped Carbon Dots ◽  
Excellent Stability

scholarly journals Difunctional Cu-doped carbon dots: catalytic activity and fluorescence indication for the reduction reaction of p-nitrophenol

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 33929-33936 ◽  
Author(s):  
Jinyan Du ◽  
Yun Zhao ◽  
Juan Chen ◽  
Ping Zhang ◽  
Lingling Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Dots ◽  
Reduction Reaction ◽  
Doped Carbon Dots

The reduction reaction ofp-nitrophenol was catalyzed and monitored using the fluorescence of Cu-doped CDs.

Functionalized nitrogen-doped carbon dot-modified yolk–shell ZnFe2O4 nanospheres with highly efficient light harvesting and superior catalytic activity

Nanoscale ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 3877-3887 ◽  
Author(s):  
Jianan Li ◽  
Xinyong Li ◽  
Libin Zeng ◽  
Shiying Fan ◽  
Mingmei Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Dots ◽  
Light Harvesting ◽  
Carbon Dot ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon ◽  
First Time

In this work, novel nitrogen-doped carbon dots (NCDs) modified ZnFe2O4 yolk–shell nanostructure photocatalysts have been fabricated for the first time.

Nitrogen-doped carbon dots encapsulated in the mesoporous channels of SBA-15 with solid-state fluorescence and excellent stability

Nanoscale ◽  
2019 ◽  
Vol 11 (15) ◽  
pp. 7247-7255 ◽  
Author(s):  
Qing Chang ◽  
Shanshan Yang ◽  
Chaorui Xue ◽  
Ning Li ◽  
Yanzhong Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Carbon Dots ◽  
Nitrogen Doped ◽  
Solid State Fluorescence ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon ◽  
Excellent Stability

Nitrogen-doped carbon dots encapsulated in the mesoporous channels of SBA-15 (NCDs-in-SBA-15), with excellent structural, thermal and photostability, are successfully achieved.

Boron and nitrogen co-doped carbon dots as a metal-free catalyst for hydrogen generation from sodium borohydride

2016 ◽  
Vol 40 (10) ◽  
pp. 8823-8828 ◽  
Author(s):  
Mohammad Reza Nabid ◽  
Yasamin Bide ◽  
Nazanin Fereidouni
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Sodium Borohydride ◽  
Carbon Dots ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Intrinsic Properties ◽  
Metal Free ◽  
Doped Carbon Dots ◽  
Co Doped

The high catalytic activity of B,N co-doped CDs is due to the synergistic effect of nitrogen and boron dopants and the intrinsic properties of carbon dots.

Heteroatom Doped Carbon Dots with Nanoenzyme Like Properties as Theranostic Platforms for Free Radical Scavenging, Imaging, and Chemotherapy

2020 ◽  
Author(s):  
Khalilalrahman Dehvari ◽  
Sheng-Hui Chiu ◽  
Jin-Sheng Lin ◽  
Wubshet Mekonnen Girm ◽  
Yong-Chien Ling ◽  
...  
Keyword(s):  
Free Radical ◽  
Carbon Dots ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Doped Carbon Dots
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