Journal
NANOSCALE
Volume 7, Issue 5, Pages 2003-2008Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr06484d
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Funding
- National Natural Science Foundation of China [21136006, 21206043, 21236003, 21322607, 21406072]
- Shangai Shuguang Scholars Program [13SG31]
- Shanghai Rising-Star Program [13QA1401100]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- China Postdoctoral Science Foundation [2014M560307, 2014M561497]
- Fundamental Research Funds for the Central Universities
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Here, we demonstrate novel carbon-nitrogen quantum dots (CNQDs) by the hydrothermal method using melamine and glutaraldehyde. CNQDs are uniformly dispersed with particle diameters of 3-8 nm. These prepared CNQDs show excellent luminescence properties and the photoluminescent quantum yields of CNQDs with 365 nm emission are up to 31%. Interestingly, CNQDs possess the co-existence of both p-and n-type conductivities from the Mott-Schottky relationship. Furthermore, the electrochemical measurements reveal that CNQDs exhibit catalytic activity for the oxygen reduction reaction (ORR). However, the low electrical conductivity affects the ORR electrocatalytic activity. So the catalysis is conducted by chemical coupling of CNQDs on Ag nanoparticles (NPs), the resulting CNQD/Ag NP catalyst is demonstrated to possess superior electrocatalytic ability for the ORR in an alkaline medium.
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