N-doped carbon quantum dots/TiO2 composite with improved photocatalytic activity
authors Martins, NCT; Angelo, J; Girao, AV; Trindade, T; Andrade, L; Mendes, A
nationality International
journal APPLIED CATALYSIS B-ENVIRONMENTAL
author keywords N-doped carbon quantum dots; P25; Photocatalyst; NO photo-oxidation; Methylene blue degradation
keywords MICROWAVE-ASSISTED PYROLYSIS; ONE-STEP SYNTHESIS; VISIBLE-LIGHT; NOX ABATEMENT; TIO2 PHOTOCATALYSIS; METHYLENE-BLUE; NITRIC-OXIDE; DOTS; DEGRADATION; REMOVAL
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.
publisher ELSEVIER SCIENCE BV
issn 0926-3373
year published 2016
volume 193
beginning page 67
ending page 74
digital object identifier (doi) 10.1016/j.apcatb.2016.04.016
web of science category Chemistry, Physical; Engineering, Environmental; Engineering, Chemical
subject category Chemistry; Engineering
unique article identifier WOS:000377234800008
  ciceco authors
  impact metrics
times cited (wos core): 15
journal impact factor (jcr 2016): 9.446
5 year journal impact factor (jcr 2016): 8.870
category normalized journal impact factor percentile (jcr 2016): 96.169
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