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Article

Development of Photocatalytic 3D-Printed Cementitious Mortars: Influence of the Curing, Spraying Time Gaps and TiO2 Coating Rates

1
ISISE, Institute of Science and Innovation for Bio-Sustainability (IB-S), Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
2
CTAC, Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
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Centre of Physics of Minho and Porto Universities (CF-UM-UP), Azurém Campus, University of Minho, 4800-058 Guimarães, Portugal
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Innovation Point, Rua de Pitancinhos—Palmeira, 4700-727 Braga, Portugal
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ISISE, Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
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Centre of Physics of Minho and Porto Universities (CF-UM-UP), Gualtar Campus, University of Minho, 4704-553 Braga, Portugal
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Łukasz Sadowski
Buildings 2021, 11(9), 381; https://doi.org/10.3390/buildings11090381
Received: 16 July 2021 / Revised: 22 August 2021 / Accepted: 24 August 2021 / Published: 27 August 2021
(This article belongs to the Section Building Materials, and Repair & Renovation)
This work evaluated the photocatalytic activity of 3D-printed cementitious mortar specimens functionalized with TiO2 nanoparticles to obtain a multifunctional and smart concrete. This research aims to assess the influence of different parameters related to the functionalization process such as adsorption, coating time gaps, and coating rates on the degradation efficiency of the functionalized cementitious specimens. Each specimen was evaluated under the degradation of Rhodamine B (RhB) in an aqueous solution using a sun-light simulation. The obtained results showed a decrease in adsorption (under dark condition) with increasing the sample curing age. The highest photocatalytic efficiency was observed for coated samples aged 7 days. By increasing the coating rates, the photocatalytic efficiency is enhanced. Nonetheless, regardless of the coating rates, all the specimens showed an increase in photocatalytic efficiency for longer time periods of light exposition, i.e., after 8 h of irradiation. View Full-Text
Keywords: 3D concrete printing; TiO2 nanoparticles; surface coating; functionalized cementitious materials; smart mortar; photocatalytic mortar 3D concrete printing; TiO2 nanoparticles; surface coating; functionalized cementitious materials; smart mortar; photocatalytic mortar
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MDPI and ACS Style

Zahabizadeh, B.; Segundo, I.R.; Pereira, J.; Freitas, E.; Camões, A.; Tavares, C.J.; Teixeira, V.; Cunha, V.M.C.F.; Costa, M.F.M.; Carneiro, J.O. Development of Photocatalytic 3D-Printed Cementitious Mortars: Influence of the Curing, Spraying Time Gaps and TiO2 Coating Rates. Buildings 2021, 11, 381. https://doi.org/10.3390/buildings11090381

AMA Style

Zahabizadeh B, Segundo IR, Pereira J, Freitas E, Camões A, Tavares CJ, Teixeira V, Cunha VMCF, Costa MFM, Carneiro JO. Development of Photocatalytic 3D-Printed Cementitious Mortars: Influence of the Curing, Spraying Time Gaps and TiO2 Coating Rates. Buildings. 2021; 11(9):381. https://doi.org/10.3390/buildings11090381

Chicago/Turabian Style

Zahabizadeh, Behzad, Iran R. Segundo, João Pereira, Elisabete Freitas, Aires Camões, Carlos J. Tavares, Vasco Teixeira, Vítor M.C.F. Cunha, Manuel F.M. Costa, and Joaquim O. Carneiro 2021. "Development of Photocatalytic 3D-Printed Cementitious Mortars: Influence of the Curing, Spraying Time Gaps and TiO2 Coating Rates" Buildings 11, no. 9: 381. https://doi.org/10.3390/buildings11090381

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