Hydration accelerator and photocatalyst of nanotitanium dioxide synthesized via surfactant-assisted method in cement mortar

Yuenyongsuwan, Jirayu; Sinthupinyo, Sakprayut; O’Rear, Edgar A.; Pongprayoon, Thirawudh

doi:10.1016/j.cemconcomp.2018.11.024

Cited by 22 publications

(19 citation statements)

References 22 publications

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“…When TiO 2 is incorporated into concrete or mortar it can convert dangerous pollutants into less harmful products [4]. In addition to the air purification capacity, TiO 2loaded materials can develop self-cleaning and antimicrobial properties [5,6]. Therefore, the use of this semiconductor in building materials has not only the potential to improve air quality and mitigate global warming, but also to allow savings in maintenance (costs and operational time) by generating self-cleaning surfaces with great potential to reduce the presence of microorganisms [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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

2022

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Since the early seventies with the work of Akira Fujishima on photocatalytic and superhydrophilic properties of titanium dioxide (TiO2), also known as the Honda–Fujishima effect, photocatalysis has been investigated and progressively implemented in cement-based materials towards the development of self-cleaning, air-purifying and antiseptic materials, buildings and infrastructure. Although important achievements have been obtained at the laboratory scale, their real scale application has had some limitations mainly due to the low efficiencies obtained during adverse environmental conditions. Therefore, this article presents the challenges and opportunities of using of titanium dioxide in cement-based materials towards the development of truly efficient sustainable building materials. First, TiO2 photocatalysis and its incorporation in cementitious materials are presented. Second, self-cleaning, air-purifying and antimicrobial properties are discussed in terms of the lab and pilot project results. Third, conclusions regarding the different multifunctional properties are given towards the real application of TiO2 photocatalysis. Particularly, complementary technologies and strategies are presented in order to increase the above-mentioned multifunctional properties.

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Section: Introductionmentioning

confidence: 99%

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

2022

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“…The behavior of cement hydration can generally be divided into five stages ( Supplementary Figure S1 ). In line with previous work from Yuenyongsuwan et al [ 12 ] and Kim et al [ 27 ], this study concentrated on the acceleration period (stage 3) and the deceleration period (stage 4) of the hydration behavior curve. The effect of the nanofiller on hydration can be observed at the maximum heat flow values which occur in these stages [ 14 , 27 ].…”

Section: Methodsmentioning

confidence: 67%

“…The hardening of cement materials is the result of hydration reactions of OPC with water. Basically, hydration can be separated into five stages ( Supplementary Figure S1 ) [ 4 , 10 , 11 , 12 , 13 ]. The first stage, very soon after mixing, involves C 3 A reacting with water to form an aluminate-rich gel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Morphologically Controlled Hematite Nanoparticles on the Properties of Fly Ash Blended Cement

et al. 2021

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Several types of hematite nanoparticles (α-Fe2O3) have been investigated for their effects on the structure and properties of fly ash (FA) blended cement. All synthesized nanoparticles were found to be of spherical shape, but of different particle sizes ranging from 10 to 195 nm depending on the surfactant used in their preparation. The cement hydration with time showed 1.0% α-Fe2O3 nanoparticles are effective accelerators for FA blended cement. Moreover, adding α-Fe2O3 nanoparticles in FA blended cement enhanced the compressive strength and workability of cement. Nanoparticle size and size distribution were important for optimal filling of various size of pores within the cement structure.

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“…According to other research, the concentration of MB solution decreased when cement paste was placed in MB solution; this may be attributed to the self-decomposition of MB and absorption by the cement paste [12,50,51]. Therefore, the change in concentration of MB solution with OPC and without OPC in dark conditions was measured, as shown in Figure 9.…”

Section: Photocatalytic Performancementioning

confidence: 82%

“…Nano-reinforcement technology plays a critical role in a novel research direction in the field of construction and building materials [12]. Among the materials used in civil and architectural fields, cementitious materials, such as concrete, are considered to be one of the most popular materials used and consumed.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Performance Evaluation of Titanium Dioxide Nanotube-Reinforced Cement Paste

et al. 2020

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Considering the increase in research regarding environmental pollution reduction, the utilization of cementitious material, a commonly used construction material, in photocatalysts has become a desirable research field for the widespread application of photocatalytic degradation technology. Nano-reinforcement technology for cementitious materials has been extensively researched and developed. In this work, as a new and promising reinforcing agent for cementitious materials, the photocatalytic performance of titanium dioxide nanotube (TNT) was investigated. The degradation of methylene blue was used to evaluate the photocatalytic performance of the TNT-reinforced cement paste. In addition, cement paste containing micro-TiO2 (m-TiO2) and nano-TiO2 (n-TiO2) particles were used for comparison. Moreover, the effect of these TiO2-based photocatalytic materials on the cement hydration products was monitored via X-ray diffraction (XRD) and thermogravimetric analysis (TG). The results indicated that all the TiO2 based materials promoted the formation of hydration products. After 28 days of curing, the TNT-reinforced cement paste contained the maximum amount of hydration products (Ca(OH)2). Furthermore, the cement paste containing TNT exhibited better photocatalytic effects than that containing n-TiO2, but worse than that containing m-TiO2.

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Hydration accelerator and photocatalyst of nanotitanium dioxide synthesized via surfactant-assisted method in cement mortar

Cited by 22 publications

References 22 publications

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

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

Effect of Morphologically Controlled Hematite Nanoparticles on the Properties of Fly Ash Blended Cement

Photocatalytic Performance Evaluation of Titanium Dioxide Nanotube-Reinforced Cement Paste

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