Self-cleaning and air purification performance of Portland cement paste with low dosages of nanodispersed TiO2 coatings

Zixiao Wang; Florent Gauvin; Pan Feng; H.J.H. (Jos) Brouwers; Q.L. (Qingliang) Yu

doi:10.1016/j.conbuildmat.2020.120558

Self-cleaning and air purification performance of Portland cement paste with low dosages of nanodispersed TiO2 coatings

Zixiao Wang (Corresponding author)
, Florent Gauvin
, Pan Feng
, H.J.H. (Jos) Brouwers
, Q.L. (Qingliang) Yu

Building Materials

Research output: Contribution to journal › Article › Academic › peer-review

44 Citations (Scopus)

167 Downloads (Pure)

Abstract

The strong agglomeration potential and poor re-dispersibility of nano TiO2 particles in powder form seriously affect the depollution and self-cleaning performances. The nano TiO2 particles in hydrosol form can be stably dispersed in aqueous solution, but the synthetic temperature influences the crystal pattern, stability, and hydrodynamic diameter of nano TiO2 particles. In this study, a stable and nano dispersed anatase TiO2 hydrosol is synthesized by hydrolysis of titanium isopropoxide, and the effects of synthetic temperature on physicochemical properties and stability of TiO2 hydrosol are discussed. The photocatalytic and self-cleaning performances of synthetic TiO2 hydrosol coating are characterized by the colour change rate of Rhodamine B and NOx conversion UV irradiation. Compared with a commercial nano TiO2 powder (Degussa P-25), the TiO2 hydrosol coating with very low dosages shows better photocatalytic and self-cleaning performances under the same experimental conditions.

Original language	English
Article number	120558
Number of pages	8
Journal	Construction and Building Materials
Volume	263
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.120558
Publication status	Published - 10 Dec 2020

Funding

The authors appreciate the financial supports from the National Natural Science Foundation of China (No. 1706222 , No. 51708108 ), the China Scholarship Council (No. 201806090146 ), and Eindhoven University of Technology (TU/e). The authors gratefully acknowledge M.Sc. Bin Meng (Building Performance group of TU/e) for his help in processing self-cleaning performance characterization data, and Prof. Albert Schenning and M.Sc. Xinglong Pan (Stimuli-responsive Functional Materials & Devices group of TU/e) for their support and suggestions in the spectrum analysis discussion.

Funders	Funder number
National Natural Science Foundation of China	51708108, 1706222
Eindhoven University of Technology
China Scholarship Council	201806090146

Keywords

Air purification performance
Portland cementitious materials
Self-cleaning coatings
Synthetic temperature
TiO hydrosol

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10.1016/j.conbuildmat.2020.120558

1-s2.0-S0950061820325630-mainFinal published version, 0.99 MBLicence: CC BY-NC-ND

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title = "Self-cleaning and air purification performance of Portland cement paste with low dosages of nanodispersed TiO2 coatings",

abstract = "The strong agglomeration potential and poor re-dispersibility of nano TiO2 particles in powder form seriously affect the depollution and self-cleaning performances. The nano TiO2 particles in hydrosol form can be stably dispersed in aqueous solution, but the synthetic temperature influences the crystal pattern, stability, and hydrodynamic diameter of nano TiO2 particles. In this study, a stable and nano dispersed anatase TiO2 hydrosol is synthesized by hydrolysis of titanium isopropoxide, and the effects of synthetic temperature on physicochemical properties and stability of TiO2 hydrosol are discussed. The photocatalytic and self-cleaning performances of synthetic TiO2 hydrosol coating are characterized by the colour change rate of Rhodamine B and NOx conversion UV irradiation. Compared with a commercial nano TiO2 powder (Degussa P-25), the TiO2 hydrosol coating with very low dosages shows better photocatalytic and self-cleaning performances under the same experimental conditions.",

keywords = "Air purification performance, Portland cementitious materials, Self-cleaning coatings, Synthetic temperature, TiO hydrosol",

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T1 - Self-cleaning and air purification performance of Portland cement paste with low dosages of nanodispersed TiO2 coatings

AU - Wang, Zixiao

AU - Gauvin, Florent

AU - Feng, Pan

AU - Brouwers, H.J.H. (Jos)

AU - Yu, Q.L. (Qingliang)

PY - 2020/12/10

Y1 - 2020/12/10

N2 - The strong agglomeration potential and poor re-dispersibility of nano TiO2 particles in powder form seriously affect the depollution and self-cleaning performances. The nano TiO2 particles in hydrosol form can be stably dispersed in aqueous solution, but the synthetic temperature influences the crystal pattern, stability, and hydrodynamic diameter of nano TiO2 particles. In this study, a stable and nano dispersed anatase TiO2 hydrosol is synthesized by hydrolysis of titanium isopropoxide, and the effects of synthetic temperature on physicochemical properties and stability of TiO2 hydrosol are discussed. The photocatalytic and self-cleaning performances of synthetic TiO2 hydrosol coating are characterized by the colour change rate of Rhodamine B and NOx conversion UV irradiation. Compared with a commercial nano TiO2 powder (Degussa P-25), the TiO2 hydrosol coating with very low dosages shows better photocatalytic and self-cleaning performances under the same experimental conditions.

AB - The strong agglomeration potential and poor re-dispersibility of nano TiO2 particles in powder form seriously affect the depollution and self-cleaning performances. The nano TiO2 particles in hydrosol form can be stably dispersed in aqueous solution, but the synthetic temperature influences the crystal pattern, stability, and hydrodynamic diameter of nano TiO2 particles. In this study, a stable and nano dispersed anatase TiO2 hydrosol is synthesized by hydrolysis of titanium isopropoxide, and the effects of synthetic temperature on physicochemical properties and stability of TiO2 hydrosol are discussed. The photocatalytic and self-cleaning performances of synthetic TiO2 hydrosol coating are characterized by the colour change rate of Rhodamine B and NOx conversion UV irradiation. Compared with a commercial nano TiO2 powder (Degussa P-25), the TiO2 hydrosol coating with very low dosages shows better photocatalytic and self-cleaning performances under the same experimental conditions.

KW - Air purification performance

KW - Portland cementitious materials

KW - Self-cleaning coatings

KW - Synthetic temperature

KW - TiO hydrosol

UR - https://www.scopus.com/pages/publications/85090213025

U2 - 10.1016/j.conbuildmat.2020.120558

DO - 10.1016/j.conbuildmat.2020.120558

M3 - Article

AN - SCOPUS:85090213025

SN - 0950-0618

VL - 263

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 120558

ER -

Self-cleaning and air purification performance of Portland cement paste with low dosages of nanodispersed TiO2 coatings

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