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N-doped carbon quantum dots/TiO2 composite with improved photocatalytic activity

Open access
Martins, Natércia C.T., Ângelo, Joana, Girão, Ana Violeta, Trindade, Tito, Andrade, Luísa, Mendes, Adélio·2016·Applied Catalysis B: Environmental

Abstract

A new composite of TiO2 (P25) and N-doped carbon quantum dots (P25/NCQD) was prepared by a hydrothermal method and was used for the first time as catalyst of the photo- oxidation of NO under UV and visible light irradiation. P25/NCQD composite exhibited a NO conversion (27.0%) more than two times higher of that observed for P25 (10%) under visible light and the selectivity of the process was increased from 37.4% to 49.3%. The composite also showed better photocatalytic performance than P25 in the UV region with increases of 36.3% on NO conversion and 16.8% on selectivity. Moreover, compared with P25, the photodegradation ratio of methylene blue was enhanced from 68% to 91% after UV irradiation for 1 h. NCQD played a crucial role on the photocatalytic activity improvement of P25/NCQD, increasing visible light absorption, slowing the recombination and improving the charge transfer.

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Metadata

Authors
Martins, N. C. T., Ângelo, J., Girão, A. V., Trindade, T., Andrade, L., & Mendes, A.
Venue
Applied Catalysis B: Environmental
Publisher
Elsevier BV
Published
2016-09
Volume
193
Pages
67-74
ISSN
0926-3373 (ISSN-L)
OpenAlex
W2318665537
Cited by
398
References
43
FWCI
9.92
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: N-doped carbon quantum dots/TiO2 composite with improved photocatalytic activity. https://app.cochat.ai/papers/10.1016/j.apcatb.2016.04.016
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Martins, N. C. T., Ângelo, J., Girão, A. V., Trindade, T., Andrade, L., & Mendes, A. (2016). N-doped carbon quantum dots/TiO2 composite with improved photocatalytic activity. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2016.04.016

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