Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance
Although photocatalytic concrete can significantly contribute to the degradation of air pollutants and improving the sustainability levels, the complexity of ordinary cement system often caused the uncertain performance of mixed photocatalysts, which limited the real application of photocatalysts. S...
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doaj-74b68ca5a00c43a98b9d38df80e302742020-11-25T04:03:18ZengMDPI AGCatalysts2073-43442020-11-01101336133610.3390/catal10111336Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic PerformanceHeyang Si0Yongle Fang1Lu Yang2State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, ChinaSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, ChinaAlthough photocatalytic concrete can significantly contribute to the degradation of air pollutants and improving the sustainability levels, the complexity of ordinary cement system often caused the uncertain performance of mixed photocatalysts, which limited the real application of photocatalysts. Since the rapid carbonization hardening and relatively simple composition, γ-C<sub>2</sub>S carbonated binding material has gained considerable attention for its application in construction material. In this work, quartz sand-supported TiO<sub>2</sub>-C<sub>2</sub>S(γ) composites (TQSC) were prepared by mixing photocatalytic quartz sand with γ-C<sub>2</sub>S and mounting in γ-C<sub>2</sub>S matrix surface methods. The TiO<sub>2</sub>-coated quartz sand (TQS) was characterized by X-ray diffraction (XRD), quantitative X-ray fluorescence (XRF) and scanning electron microscopy (SEM). The photocatalytic performance and durability (washing resistance) of TQSC were also investigated by the degradation ability of NOx and rhodamine B (RhB). The results show that a uniform TiO<sub>2</sub> layer on quartz sand was prepared, and the photocatalytic De-NOx (degradation of NOx) performance increased with increasing the mounted amounts of TiO<sub>2</sub>/quartz sand in γ-C<sub>2</sub>S carbonated matrix surface, but would decrease the photocatalytic durability. After water-washing, the De-NOx efficiencies of TQSC specimens decreased quickly at the beginning, which were adhering to the mounted amounts of TiO<sub>2</sub>/quartz sand, but would become stable after water-washing for 3600 s for all samples. The relatively high De-NOx stability and good self-cleaning effect of the water-washed TQSC-60% specimen can be considered a promising photocatalytic product for real applications.https://www.mdpi.com/2073-4344/10/11/1336photocatalytic concreteγ-C<sub>2</sub>S carbonated binding materialsupported TiO<sub>2</sub>NOxphotocatalytic durability |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Heyang Si Yongle Fang Lu Yang |
spellingShingle |
Heyang Si Yongle Fang Lu Yang Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance Catalysts photocatalytic concrete γ-C<sub>2</sub>S carbonated binding material supported TiO<sub>2</sub> NOx photocatalytic durability |
author_facet |
Heyang Si Yongle Fang Lu Yang |
author_sort |
Heyang Si |
title |
Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance |
title_short |
Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance |
title_full |
Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance |
title_fullStr |
Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance |
title_full_unstemmed |
Application of Supported TiO<sub>2</sub> in Carbonated Binding Material and Its Photocatalytic Performance |
title_sort |
application of supported tio<sub>2</sub> in carbonated binding material and its photocatalytic performance |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2020-11-01 |
description |
Although photocatalytic concrete can significantly contribute to the degradation of air pollutants and improving the sustainability levels, the complexity of ordinary cement system often caused the uncertain performance of mixed photocatalysts, which limited the real application of photocatalysts. Since the rapid carbonization hardening and relatively simple composition, γ-C<sub>2</sub>S carbonated binding material has gained considerable attention for its application in construction material. In this work, quartz sand-supported TiO<sub>2</sub>-C<sub>2</sub>S(γ) composites (TQSC) were prepared by mixing photocatalytic quartz sand with γ-C<sub>2</sub>S and mounting in γ-C<sub>2</sub>S matrix surface methods. The TiO<sub>2</sub>-coated quartz sand (TQS) was characterized by X-ray diffraction (XRD), quantitative X-ray fluorescence (XRF) and scanning electron microscopy (SEM). The photocatalytic performance and durability (washing resistance) of TQSC were also investigated by the degradation ability of NOx and rhodamine B (RhB). The results show that a uniform TiO<sub>2</sub> layer on quartz sand was prepared, and the photocatalytic De-NOx (degradation of NOx) performance increased with increasing the mounted amounts of TiO<sub>2</sub>/quartz sand in γ-C<sub>2</sub>S carbonated matrix surface, but would decrease the photocatalytic durability. After water-washing, the De-NOx efficiencies of TQSC specimens decreased quickly at the beginning, which were adhering to the mounted amounts of TiO<sub>2</sub>/quartz sand, but would become stable after water-washing for 3600 s for all samples. The relatively high De-NOx stability and good self-cleaning effect of the water-washed TQSC-60% specimen can be considered a promising photocatalytic product for real applications. |
topic |
photocatalytic concrete γ-C<sub>2</sub>S carbonated binding material supported TiO<sub>2</sub> NOx photocatalytic durability |
url |
https://www.mdpi.com/2073-4344/10/11/1336 |
work_keys_str_mv |
AT heyangsi applicationofsupportedtiosub2subincarbonatedbindingmaterialanditsphotocatalyticperformance AT yonglefang applicationofsupportedtiosub2subincarbonatedbindingmaterialanditsphotocatalyticperformance AT luyang applicationofsupportedtiosub2subincarbonatedbindingmaterialanditsphotocatalyticperformance |
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