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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[1]   Photocatalytic systems as an advanced environmental remediation: Recent developments, limitations and new avenues for applications [J].
Ahmad, Rizwan ;
Ahmad, Zaki ;
Khan, Asad Ullah ;
Mastoi, Naila Riaz ;
Aslam, Muhammad ;
Kim, Jeonghwan .
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2016, 4 (04) :4143-4164
[2]   Mesoporous anatase TiO2 films:: Use of TiK XANES for the quantification of the nanocrystalline character and substrate effects in the photocatalysis behavior [J].
Angelome, Paula C. ;
Andrini, Leandro ;
Calvo, Mauricio E. ;
Requejo, Felix Gregorio ;
Bilmes, Sara A. ;
Soler-Illia, Galo J. A. A. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (29) :10886-10893
[3]  
[Anonymous], NAN COL CONS
[4]  
[Anonymous], ACT CER ANT ANT TIL
[5]  
[Anonymous], MARK SELF CLEAN COAT
[6]  
[Anonymous], SELF CLEAN BACT DEC
[7]  
[Anonymous], IAQVEC 2007 P 6 INT
[8]  
[Anonymous], SELF CLEAN GLASS
[9]   Synthesis and photocatalytic properties of dense and porous TiO2-anatase thin films prepared by sol-gel [J].
Arconada, N. ;
Duran, A. ;
Suarez, S. ;
Portela, R. ;
Coronado, J. M. ;
Sanchez, B. ;
Castro, Y. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 86 (1-2) :1-7
[10]   Self-cleaning applications of TiO2 by photo-induced hydrophilicity and photocatalysis [J].
Banerjee, Swagata ;
Dionysiou, Dionysios D. ;
Pillai, Suresh C. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2015, 176 :396-428
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