Advancing photocatalytic concrete technologies for design, performance and sustainable futures

Chen, Kailun; Qu, Fulin; Huang, Yuhan; Cai, Jack; Wu, Fan; Li, Wengui

doi:10.1016/j.adna.2024.05.002

Cited by 5 publications

(1 citation statement)

References 142 publications

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“…Knowing that nanomaterials usually exhibit different properties than their macroscopic variants (photocatalytic properties in the case of TiO 2 ), the authors consider that nano-TiO 2 could additionally act as a nucleation core for hydration products. Although such a role is beneficial regarding the mechanical performance of the composite, intensification of binder hydration contributes to TiO 2 grains being covered with hydration products, limiting their exposure to external pollutants [ 44 ]. In the case of photocatalytic cementitious composites, a photocatalyst needs to be exposed to an external source of electromagnetic radiation of specific wavelengths for photocatalytic reactions to occur [ 45 ]—it needs to be located on the outer surface of the element.…”

Section: Resultsmentioning

confidence: 99%

The Potential Risk of Nanoparticulate Release from Photocatalytic Pavement Concrete Surface Due to a Simulated Abrasion Load—An Experimental Study

Witkowski,

Jarosławski,

Szkop

et al. 2024

Materials

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The risk of the releasing of nanometric particles from construction materials with nanometric components might be one of the biggest threats to further development of them. One of the possible ingress routes to human organisms is the respiratory system. Therefore, it is crucial to determine the risk of emission of nanometric particles during material usage. In the presented paper, abrasion of mortar samples with nanometric TiO2 was investigated. A special abrasion test setup was developed to reflect everyday abrasion of the concrete surface of pavements. In the study, three TiO2-modifed mortar series (and respective reference series) underwent the developed test protocol and the grains were mobilized from their surface due to the applied load analyzed (granulation, morphology, and chemical composition). For a comparative analysis, an abrasion parameter was developed. Based on the obtained results, the modification of cementitious composites with nanometric TiO2 contributed to a reduction in the emission of aerosols and, therefore, confirmed the compatibility between TiO2 and cement matrix.

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Section: Resultsmentioning

confidence: 99%