Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/20658
Title: | N-doped carbon quantum dots/TiO2 composite with improved photocatalytic activity |
Author: | Martins, Natercia C. T. Angelo, Joana Girao, Ana Violeta Trindade, Tito Andrade, Luisa Mendes, Adelio |
Keywords: | MICROWAVE-ASSISTED PYROLYSIS ONE-STEP SYNTHESIS VISIBLE-LIGHT NOX ABATEMENT TIO2 PHOTOCATALYSIS METHYLENE-BLUE NITRIC-OXIDE DOTS DEGRADATION REMOVAL |
Issue Date: | 2016 |
Publisher: | ELSEVIER SCIENCE BV |
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. (C) 2016 The Authors. Published by Elsevier B.V. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20658 |
DOI: | 10.1016/j.apcatb.2016.04.016 |
ISSN: | 0926-3373 |
Publisher Version: | 10.1016/j.apcatb.2016.04.016 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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N-doped carbon quantum dotsTiO2 composite with improved photocatalytic activity_10.1016j.apcatb.2016.04.016.pdf | 1.82 MB | Adobe PDF |
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