Nanotechnology: Advantages and drawbacks in the field of construction and building materials

Pacheco-Torgal, F.; Jalali, Saíd

doi:10.1016/j.conbuildmat.2010.07.009

Cited by 444 publications

(190 citation statements)

References 67 publications

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“…Considered as a passive measure for the removal of air pollutants they have been commercially available for some years. Basic principles and first experiences with their practical application have been reviewed in contributions to journals [9][10][11][12][13][14][15][16] and are summarized in compendia. 17,18 A very important group of air pollutants are the nitrogen oxides (mainly nitrogen(II) oxide, NO, and nitrogen(IV) oxide, NO 2 ).…”

Section: Introductionmentioning

confidence: 99%

Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2

Dillert

Engel

Große

et al. 2013

Phys. Chem. Chem. Phys.

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Air pollution by nitrogen oxides represents a serious environmental problem in urban areas where numerous sources of these pollutants are concentrated. One approach to reduce the concentration of these air pollutants is their light-induced oxidation in the presence of molecular oxygen and a photocatalytically active building material which uses titanium dioxide as the photocatalyst. Herein, results of an investigation concerning the influence of the photon flux and the pollutant concentration on the rate of the photocatalytic oxidation of nitrogen(II) oxide in the presence of molecular oxygen and UV(A) irradiated titanium dioxide powder are presented. A Langmuir-Hinshelwood-type rate law for the photocatalytic NO oxidation inside the photoreactor comprising four kinetic parameters is derived being suitable to describe the influence of the pollutant concentration and the photon flux on the rate of the photocatalytic oxidation of nitrogen(II) oxide.

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Section: Introductionmentioning

confidence: 99%

Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2

Dillert

Engel

Große

et al. 2013

Phys. Chem. Chem. Phys.

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“…The possibility of release of nanomaterials into the environment [16][17][18][19][20] results in the serious concerns about safety issues dealing with: 1) their higher toxicity in A c c e p t e d M a n u s c r i p t comparison with their bulk counterparts; 2) the absence of the legislation normative for permitted levels of various NMs in water and air; and 3) the absence of the adequate analytical techniques for detection of NMs in the environment [21,22].…”

Section: Introductionmentioning

confidence: 99%

Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dots

Bastos-Arrieta

Muñoz

Stenbock-Fermor

et al. 2016

Applied Surface Science

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Multiwall Carbon Nanotubes (MWCNTs) and Nanodiamonds (NDs). The synthetic route takes advantage of the ion exchange functionality of the reactive surfaces for the loading of the QDs precursor and consequent QDs appearance by precipitation. The benefits of such modified nanomaterials were studied using CdS-QDs@MWCNTs hybrid-nanomaterials.CdS-QDs@MWCNTs has been used as conducting filler for the preparation of electrochemical nanocomposite sensors, which present electrocatalytic properties. Finally,

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“…Ultrafine particles, usually under a hundred nanometer a diameter, have unique qualities that larger particles of the same materials do not possess. Little by little, nanoparticles have found their way to various applications and the concrete industry is no exception [3] [4]. In concrete, these ultrafine particles can have an effect in multiple ways.…”

Section: Introductionmentioning

confidence: 99%

Spray-Dry Agglomerated Nanoparticles in Ordinary Portland Cement Matrix

Vehmas¹,

Kanerva²,

Holt³

2014

MSA

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Nano-sized particles have got a focus of great interest for the past decade. These ultrafine particles can have an effect in multiple ways on concrete technology. Although most of the effects of nanoparticles are desired, a huge surface area introduced by nanoparticles also incorporates negative effects, such as loss of workability and safety aspects. Agglomeration of nano-sized particles by spray-drying is one potential method to overcome the negative effects. In this study, ultra-fine material was dispersed and agglomerated successfully. Agglomerate structure was analyzed and performance was evaluated with mortar samples. Agglomerated nano-sized material had micronsized inner porosity, which enabled water penetration into the agglomerates. In water exposure, agglomerates did not dissolve although some of binder glue and dispersing agent leaked out. Water penetration and organic material leaking enabled high reactivity and workability of the agglomerated nanoparticles. In spite of the high reactivity of agglomerated nanoparticles, slightly lower final compression strengths were observed with agglomerated ultrafine particles. The results of this study can be used in concrete technology when further developing admixture technologies and recipe designs. The negative side-effects of the agglomerated nanoparticles can be overcome and accounted for within application areas.

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Nanotechnology: Advantages and drawbacks in the field of construction and building materials

Cited by 444 publications

References 67 publications

Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2

Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2

Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dots

Spray-Dry Agglomerated Nanoparticles in Ordinary Portland Cement Matrix

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