Titanium dioxide coated cementitious materials for air purifying purposes: Preparation, characterization and toluene removal potential

Ramirez, Anibal Maury; Demeestere, Kristof; Belie, Nele De; Mäntylä, T.; Levänen, Erkki

doi:10.1016/j.buildenv.2009.09.003

Cited by 172 publications

(73 citation statements)

References 28 publications

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“…Reduction of cyanide-ions was being examined in irradiated TiO 2 suspension (Górska 2009). Further research of the so-called heterogeneous photocatalysis by TiO 2 relied on the use of this substance for decomposing environmental pollutions (Górska 2009, Ramirez et al 2010. At present, the possibility of applying the heterogeneous photocatalysis using TiO 2 is being used to eliminate organic pollutants from air, water and sewers (Hoffmann et al 1995, Wang et al 1999, Frazer 2001, Ao et al 2003, Devahasdin et al 2003) and in the processes of self-purification of surfaces (Wang et al 1999, Giergiczny & Sokołowski 2009, Langridge et al 2009).…”

Section: Titanium In the Industrymentioning

confidence: 99%

Titanium compounds and their impact on the transformation of air pollutants

Bok¹,

Bożym²

2015

geol

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Titanium, as a transition metal, demonstrates a high mechanical strength. It is light and corrosion resistant. The estimation of the environmental impact of the use of machine parts that grains are freed from and contact the surface of titanium alloys by wear is buffing. Due to its catalytic action, TiO 2 is nowadays added to asphalt, concrete, exterior paints for elevation, self-cleaning glass and protective coatings. It is also present in clothes, food (E171), cosmetics (CI 77891) and textiles. The research on the toxicity of titanium and its compounds points towards their neutral character, however an adverse impact is also observed in nature. TiO 2 may affect air quality. It promotes free radicals and ozone origination. The properties and direction of the use of titanium compounds and their influence on the circulation of pollutants are described below.

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Section: Titanium In the Industrymentioning

confidence: 99%

Titanium compounds and their impact on the transformation of air pollutants

Bok¹,

Bożym²

2015

geol

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“…This is why the observations were completed with profilometry of the surface. Mechanical and optical profilometry are sometimes used on concrete to assess its roughness and evaluate its behavior regarding adhesion problems [3][4][5].…”

Section: Microtopographymentioning

confidence: 99%

Multi-technique investigation of calcium hydroxide crystals at the concrete surface

Gueit

Darque-Ceretti

Tintillier

et al. 2011

Materials Characterisation V

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The durability and aesthetic qualities of high-performance concrete, which makes it particularly suitable for architectural applications, are constantly compromised by environmental aggressions. In this study, an innovative solution was developed to protect the concrete from these aggressions, which consists of growing a mineral coating on the concrete surface. The coating is composed of layered calcium hydroxide crystals, whose nucleation and growth are triggered byvarious non-ionic surfactants (the details of the process will not be presented). This paper describes the procedure used to investigate the structure of the formed crystals. Scanning Electron Microscopy and optical microtopography were used to determine the morphology of the crystals. Image analysis allowed the quantification of their amount, size and shape. The contribution and limits of each technique are discussed.

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“…Titanium-dioxide (TiO 2 ) has been extensively studied recently in the field of environmental protection due to its high photocatalytic efficiency in the processes of water and air purification (1)(2)(3)(4). Among many candidates for photocatalysts, TiO 2 is almost the only material suitable for this application because it has presented the most efficient photoactivity, the highest stability, and the lowest cost and nontoxicity (5)(6)(7).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanocomposite coating based on TiO<sub>2</sub>/ZnAl layer double hydroxides

et al. 2017

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ABSTRACT:The aim of this investigation was the synthesis of nanocomposite coatings based on Zn-Al layered double hydroxides (Zn-Al LDH) and TiO 2 . The Zn-Al LDH material, which acted as the catalyst support of the active TiO 2 component (in the content of 3 and 10 wt. %), was synthesized by a low super saturation co-precipitation method. The interaction between the Zn-Al LDH and the active TiO 2 component was accomplished by using vacuum evaporation prior to the mechanical activation and only by mechanical activation. The final suspension based on Zn-Al LDH and 10wt. % TiO 2 , impregnated only by mechanical activation, showed the optimal characteristics from the aspect of particle size distribution and XRD analysis. These properties had a positive effect on the functional properties of the coatings (photocatalytic activity and self-cleaning efficiency) after the water rinsing procedure. KEYWORDS: RESUMEN: Síntesis de un revestimiento nanocompuesto basado en TiO 2 / ZnAl hidróxidos dobles en capas.El objetivo de esta investigación fue la preparación de recubrimientos de nanocompuestos basados en Zn-Al hidróxidos dobles en capas (Zn-Al LDH) y TiO 2 . El material de LDH Zn-Al, que actuaba como catalizador del componente activo TiO 2 (en el contenido de 3 y 10 en peso.%), se sintetizó por un método de co-precipitación con baja sobresaturación. La interacción entre el Zn-Al LDH y el componente activo TiO 2 se llevó a cabo mediante el uso de la evaporación al vacío antes de la activación mecánica y sólo por activación mecánica. La suspensión final basada en Zn-Al LDH y 10wt. % TiO 2 , impregnada solamente por la activación mecánica, mostró las características óptimas desde el aspecto de la distribución de tamaño de partícula y análisis de XRD. Estas propiedades tenían un efecto positivo sobre las propiedades funcionales de los revestimientos (actividad fotocatalítica y eficiencia de auto-limpieza) después del procedimiento de aclarado de agua.ORCID ID: V. Jovanov

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Titanium dioxide coated cementitious materials for air purifying purposes: Preparation, characterization and toluene removal potential

Cited by 172 publications

References 28 publications

Titanium compounds and their impact on the transformation of air pollutants

Titanium compounds and their impact on the transformation of air pollutants

Multi-technique investigation of calcium hydroxide crystals at the concrete surface

Synthesis of nanocomposite coating based on TiO<sub>2</sub>/ZnAl layer double hydroxides

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