Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 22, Pages 6540-6544Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501912
Keywords
carbon dots; doping; electron transfer; luminescence; photooxidation
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Funding
- National Basic Research Program of China [2014CB931700]
- NSFC [61222403, 21302224, 20876176, 51303212, 51372277, 51172285, 51303202]
- China Postdoctoral Science Foundation [2014M560590]
- Shandong Provincial Natural Science Foundation [ZR2013BQ028, ZR2013EMQ013]
- Project of Science and Technology Program for Basic Research of Qingdao [14-2-4-47-jch]
- State Key Laboratory of Fine Chemicals [KF1203]
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The broadband light-absorption ability of carbon dots (CDs) has inspired their application in photocatalysis, however this has been impeded by poor electron transfer inside the CDs. Herein, we report the preparation of Cu-N-doped CDs (Cu-CDs) and investigate both the doping-promoted electron transfer and the performance of the CDs in photooxidation reactions. The Cu-N doping was achieved through a one-step pyrolytic synthesis of CDs with Na-2[Cu(EDTA)] as precursor. As confirmed by ESR, FTIR, and X-ray photoelectron spectroscopies, the Cuspecies chelates with the carbon matrix through Cu-N complexes. As a result of the Cu-N doping, the electron-accepting and -donating abilities were enhanced 2.5 and 1.5times, and the electric conductivity was also increased to 171.8scm(-1). As a result of these enhanced properties, the photocatalytic efficiency of CDs in the photooxidation reaction of 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate is improved 3.5-fold after CD doping.
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