The activity of acrylic-silicon/nano-TiO2 films for the visible-light degradation of formaldehyde and NO2

被引：31
作者：
Xiao, Gang [1 ]
Huang, Anna [1 ]
Su, Haijia [1 ]
Tan, Tianwei [1 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
来源：
BUILDING AND ENVIRONMENT | 2013年 / 65卷
关键词：
Acrylic-silicon/nano-TiO2; films; Formaldehyde; Nitrogen oxides; Visible light; Photodegradation; VOLATILE ORGANIC-COMPOUNDS; INDOOR AIR PURIFICATION; PHOTOCATALYTIC DEGRADATION; NITROGEN-OXIDES; TIO2; PHOTODEGRADATION; CATALYSTS; WATER; POLLUTANTS; OXIDATION;
D O I：
10.1016/j.buildenv.2013.04.014
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Through a novel green and low-cost emulsion blend method, acrylic-silicon/nano-TiO2 films (ASTF) were prepared showing a broad absorption band in the visible light region and could be used for the photodegradation of indoor gaseous pollutants under visible light irradiation. Compared with acrylic-silicon films, the photodegradation rate of ASTF with TiO2 content of 1% (w/v) increased by almost twice for both gaseous formaldehyde (from 28% to 76.7% at the initial concentration of 0.8 mg/m(3)) and NO2 (from 20% to 68% at the initial concentration of 3.7 mg/m(3)) under visible light irradiation for 24 h and 50 h, respectively. The binary gas degradation confirmed the higher affinity of NO2 for ASTF. In addition, ASTF with Fe-III ion doping (<100 mg/L) showed even higher photocatalytic activity with maximum degradation rate of 83.4% for formaldehyde under visible light irradiation for 24 h. ASTF, as a kind of eco-friendly coating material, could be used easily in domestic buildings for our daily life. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：215 / 221
页数：7
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