Self-cleaning TiO2 coatings for building materials: The influence of morphology and humidity in the stain removal performance

被引：13
作者：
Iveth Cedillo-Gonzalez, Erika [1 ,2 ]
Manuel Hernandez-Lopez, Juan [2 ]
Jacobo Ruiz-Valdes, Juan [2 ]
Barbieri, Virginia [1 ]
Siligardi, Cristina [1 ]
机构：
[1] Univ Modena & Reggio Emilia, Dipartimento Ingn Enzo Ferrari, Via P Vivarelli 10-1, I-41125 Modena, Italy
[2] Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Av Univ S-N,Ciudad Univ, San Nicolas De Los Garza 66455, NL, Mexico
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 237卷
关键词：
Self-cleaning; Humidity; TiO2; coatings; Non-porous; Porous; Hydration; Stain removal; Photocatalytic; Stearic acid; Water competition; PHOTOCATALYTIC OXIDATION; THIN-FILMS; GAS-PHASE; STEARIC-ACID; STONE SURFACES; WATER; TEMPERATURE; DIOXIDE; KINETICS; KETONES;
D O I：
10.1016/j.conbuildmat.2019.117692
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Similar to common building materials, TiO2 self-cleaning construction materials are exposed to the impact of humidity during their life cycle. This factor influences their photocatalytic stain removal, compromising their successful commercialization. The effect of relative humidity (RH) on the stain removal performance of porous and non-porous TiO2 self-cleaning coatings is presented. Results showed that humidity influences the hydration of clean TiO2 coatings and the photocatalytic activity due to this condition, but has less influence when a stain is already covering the coating. The porous and non-porous coatings present the best performance at RH >= 35.1% and RH = 53.4%, respectively. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：8
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