Challenges and Opportunities of Using Titanium Dioxide Photocatalysis on Cement-Based Materials

Castro-Hoyos, Angélica María; Manzano, Manuel A.; Maury-Ramírez, Aníbal

doi:10.3390/coatings12070968

Cited by 19 publications

(16 citation statements)

References 65 publications

(130 reference statements)

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“…The crystalline structure of titanium dioxide, TiO 2 , is found in three main different forms: anatase, rutile and brookite. Both anatase and rutile have a tetragonal crystal structure, while brookite has an orthorhombic crystal structure [63,65,66]. From these three crystal structures, the most commonly used in civil engineering are anatase and rutile.…”

Section: Chemical Structure and Properties-types Of Tio 2 Used In Cem...mentioning

confidence: 99%

“…During the process, the pollutants are mineralized, but the quantity of TiO 2 is not consumed. However, between 550 • C and 1000 • C anatase transforms into rutile, the transformation temperature depending on the existent impurities and the morphology of the sample [65,66,68].…”

Section: Chemical Structure and Properties-types Of Tio 2 Used In Cem...mentioning

confidence: 99%

“…Several general chemical properties of TiO 2 are listed in [66], with some of them making it adequate for use in mortar and concrete, such as its chemical stability, biocompatibility, low toxicity, and low cost compared with other nanomaterials.…”

Section: Chemical Structure and Properties-types Of Tio 2 Used In Cem...mentioning

confidence: 99%

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Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

et al. 2023

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In the past decades, nanomaterials have become one of the focal points in civil engineering research. When added to cement-based construction materials (e.g., concrete), it results in significant improvements in their strength and other important properties. However, the final mix characteristics depend on many variables that must be taken into account. As such, there is no general consensus regarding the influence upon the original material of certain nano-sized additives, the optimum dosage or the synergistic effect of two or more nano-materials. This is also the case for titanium dioxide (TiO2) and nanoclay (NC). The paper focuses on reporting the existing research data on the use of the above-mentioned materials when added to mortar and concrete. The collected data is summarized and presented in terms of strength and durability properties of cement mortar and concrete containing either TiO2 or NC. Both nano-materials have been proven, by various studies, to increase the strength of the composite, at both room and elevated temperature, when added by themselves in 0.5%~12% for TiO2 and 0.25%~6% for NC. It can be inferred that a combination of the two with the cementitious matrix can be beneficial and may lead to obtaining a new material with improved strength, elastic and durability properties that can be applied in the construction industry, with implications at the economic, social and environmental levels.

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Section: Chemical Structure and Properties-types Of Tio 2 Used In Cem...mentioning

confidence: 99%

Section: Chemical Structure and Properties-types Of Tio 2 Used In Cem...mentioning

confidence: 99%

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Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

et al. 2023

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“…According to some estimates, the most produced metal-based nanomaterials worldwide are made of silver, titanium, zinc, or gold [ 7 , 8 ]. In particular, TiO 2 NPs are widely used in commercially available products or pilot applications, including cosmetics and sunscreens, paints, food products and active packaging, photoactive cement, or innovative textiles [ 9 , 10 , 11 , 12 ], due to their special optical and photocatalytic characteristics.…”

Section: Introductionmentioning

confidence: 99%

MRC-5 Human Lung Fibroblasts Alleviate the Genotoxic Effect of Fe-N Co-Doped Titanium Dioxide Nanoparticles through an OGG1/2-Dependent Reparatory Mechanism

Miu

Nica

Diamandescu

et al. 2023

IJMS

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The current study was focused on the potential of pure P25 TiO2 nanoparticles (NPs) and Fe(1%)-N co-doped P25 TiO2 NPs to induce cyto- and genotoxic effects in MRC-5 human pulmonary fibroblasts. The oxidative lesions of P25 NPs were reflected in the amount of 8-hydroxydeoxyguanosine accumulated in DNA and the lysosomal damage produced, but iron-doping partially suppressed these effects. However, neither P25 nor Fe(1%)-N co-doped P25 NPs had such a serious effect of inducing DNA fragmentation or activating apoptosis signaling. Moreover, oxo-guanine glycosylase 1/2, a key enzyme of the base excision repair mechanism, was overexpressed in response to the oxidative DNA deterioration induced by P25 and P25-Fe(1%)-N NPs.

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“…In recent years, interest in SiO 2 , ZnO 2 , Al 2 O 3 , CuO, CaCo 3 , Fe 2 O 3 , and TiO 2 nanotechnological products, processes, and applications has raised for their advantages in many aspects of material science, among which improvement of the antimycotic behavior of the materials and airpurifying purposes (10,11). Furthermore, they provide greater durability of concrete by modifying the micro-structural, mechanical, and durability properties of concrete and mortar, (12,13).…”

Section: Introductionmentioning

confidence: 99%

Combined effect of nano-silica and silica fume to improve concrete workability and compressive strength: a case study and an overview of the literature.

Saba¹,

García-Díaz²,

Ortega³

et al. 2022

inycomp

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Several types of amorphous silica generate pozzolanic reactions at micro- and nano-scale, which can improve concrete macro-structural characteristic. However, their addition can raise the viscosity of the mixture, thus decreasing its workability. In the present work is proposed an experimental setup to determine concrete compression and manageability performance adding Silica Fume (SF), 0.0, 6.5, 8.5, 10.0% w/b, colloidal silica (nSi), 0.0, 0.5, 1.0, 1.5, 2.0, 2.5% w/b and SF-nSi combined, 0.0-0.0, 0.2-8.5, 0.2-10% w/b, and an extensive overview of the literature for concrete mixtures with SF, nSi and SF-nSi combined. The results show that the addition of SF can increase compressive strength by 12%, nevertheless, can also lead to decreases in manageability of the sample (e.g., a decrease by 67% for a dosage of 10.0% w/b). On the other hand, nSi can increase compressive strength by up to 25% with a dosage of 2.5% and can increase the manageability by 78% for dosages greater than 0.5% w/b. When combining the two materials, an increase in compressive strength was observed, along with a loss of workability. A statistical analysis of the data found in literature is proposed, highlighting interesting trends of behavior between SF and nSi with workability and compressive strength, as well as a lack of research for slump outcomes and for the effects of combined additives in concrete.

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Challenges and Opportunities of Using Titanium Dioxide Photocatalysis on Cement-Based Materials

Cited by 19 publications

References 65 publications

Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

MRC-5 Human Lung Fibroblasts Alleviate the Genotoxic Effect of Fe-N Co-Doped Titanium Dioxide Nanoparticles through an OGG1/2-Dependent Reparatory Mechanism

Combined effect of nano-silica and silica fume to improve concrete workability and compressive strength: a case study and an overview of the literature.

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