Hierarchically Porous Cu-, Co-, and Mn-Doped Platelet-Like ZnO Nanostructures and Their Photocatalytic Performance for Indoor Air Quality Control.

Autor: Papadaki D; Physics Department, National and Kapodistrian University of Athens, Panepistimioupoli, Zografoy, Athens 10679, Greece.; INRS-Centre Énergie Matériaux Télécommunications, 1650, Boulevard Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada.; DSI-CSIR National Centre for Nanostructured Materials and National Laser Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa., Mhlongo GH; DSI-CSIR National Centre for Nanostructured Materials and National Laser Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.; Department of Physics, University of the Free State, P.O. Box, 339, Bloemfontein ZA9300, South Africa., Motaung DE; DSI-CSIR National Centre for Nanostructured Materials and National Laser Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.; Department of Physics, University of the Free State, P.O. Box, 339, Bloemfontein ZA9300, South Africa., Nkosi SS; DSI-CSIR National Centre for Nanostructured Materials and National Laser Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa., Panagiotaki K; Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece., Christaki E; Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece., Assimakopoulos MN; Physics Department, National and Kapodistrian University of Athens, Panepistimioupoli, Zografoy, Athens 10679, Greece., Papadimitriou VC; Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece., Rosei F; INRS-Centre Énergie Matériaux Télécommunications, 1650, Boulevard Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada., Kiriakidis G; Institute of Electronic Structure and Laser (IESL) Foundation for Research and Technology (FORTH), 100N. Plastirastr, VassilikaVouton, Heraklion GR-70013, Crete, Greece.; Physics Department, University of Crete, VassilikaVouton, Heraklion GR-71110, Crete, Greece., Ray SS; DSI-CSIR National Centre for Nanostructured Materials and National Laser Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.; Department of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2019 Sep 27; Vol. 4 (15), pp. 16429-16440. Date of Electronic Publication: 2019 Sep 27 (Print Publication: 2019).
DOI: 10.1021/acsomega.9b02016
Abstrakt: Several parameters, including specific surface area, morphology, crystal size, and dopant concentration, play a significant role in improving the photocatalytic performance of ZnO. However, it is still unclear which of these parameters play a significant role in enhancing the photocatalytic activity. Herein, undoped and Mn-, Co-, and Cu-doped platelet-like zinc oxide (ZnO) nanostructures were synthesized via a facile microwave synthetic route, and their ultraviolet (UV) and visible-light-induced photocatalytic activities, by monitoring the gaseous acetaldehyde (CH 3 CHO) degradation, were systematically investigated. Both the pure and doped ZnO nanostructures were found to be UV-active, as the CH 3 CHO oxidation photocatalysts with the Cu-doped ZnO one being the most UV-efficient photocatalyst. However, upon visible light exposure, all ZnO-nanostructured samples displayed no photocatalytic activity except the Co-doped ZnO, which showed a measurable photocatalytic activity. The latter suggests that Co-doped ZnO nanostructures are potent candidates for several indoor photocatalytic applications. Various complementary techniques were utilized to improve the understanding of the influence of Mn-/Co-/Cu-doping on the photocatalytic performance of the ZnO nanostructures. Results showed that the synergetic effects of variation in morphology, surface defects, that is, V O , high specific surface areas, and porosity played a significant role in modulating the photocatalytic activity of ZnO nanostructures.
Competing Interests: The authors declare no competing financial interest.
(Copyright © 2019 American Chemical Society.)
Databáze: MEDLINE
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