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

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Natércia C. T. Martins (Author) FEUP; Joana Ângelo (Author) FEUP; Ana Violeta Girão (Author) Other; Luísa Andrade (Author) FEUP; Adélio Mendes (Author) FEUP; Tito Trindade (Author) Other

Journal

Title: Applied Catalysis B: Environmental

Vol. 193

Pages: 67-74

ISSN: 0926-3373

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 83 Citations

ISI Web of Science

Scopus - 171 Citations

Scientific classification

CORDIS: Technological sciences

Associated Projects

BI-DSC - Building Integrated Dye Sensitized Solar Cells

SolarConcept - Novas abordagens para aumento de eficiência das DSCs e sua melhor compreensão

Other information

Authenticus ID: P-00K-CHX

DOI: 10.1016/j.apcatb.2016.04.016

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8