TY - JOUR
T1 - Self-cleaning and depollution of fiber reinforced cement materials modified by neutral TiO 2 /SiO 2 hydrosol photoactive coatings
AU - Wang, Jian
AU - Lu, Chunhua
AU - Xiong, Jiru
PY - 2014/4/15
Y1 - 2014/4/15
N2 - Environmental pollution has an evidently adverse impact on the buildings that are constructed by the glass fiber reinforced cement (GRC) materials. In the present work, the stable, neutral TiO 2 /SiO 2 hydrosols were prepared by using the Ti(SO 4 ) 2 as titanium source, HNO 3 as peptizing agent, and SiO 2 as stabilizer through a simple and low cost process. The morphologies and structures of TiO 2 /SiO 2 hydrosol were further characterized by the TEM, SEM, XRD, and FTIR measurement. In the synthetic hydrosol, lots of nanoparticles with the diameters in the range of 10-20 nm can be observed. TiOSi band were formed, as observed from the FTIR spectrum. The Na 2 O·SiO 2 was detected from the SEM. After drying the TiO 2 / SiO 2 hydrosol, the XRD shown that the TiO 2 has an anatase structure and the SiO 2 is amorphous. The TiO 2 /SiO 2 hydrosol can be compactly coated on the GRC surface due to the existence of Na 2 O·SiO 2 binder and exhibited high photocatalytic activity and stability in the degradation of Rhodamine B.
AB - Environmental pollution has an evidently adverse impact on the buildings that are constructed by the glass fiber reinforced cement (GRC) materials. In the present work, the stable, neutral TiO 2 /SiO 2 hydrosols were prepared by using the Ti(SO 4 ) 2 as titanium source, HNO 3 as peptizing agent, and SiO 2 as stabilizer through a simple and low cost process. The morphologies and structures of TiO 2 /SiO 2 hydrosol were further characterized by the TEM, SEM, XRD, and FTIR measurement. In the synthetic hydrosol, lots of nanoparticles with the diameters in the range of 10-20 nm can be observed. TiOSi band were formed, as observed from the FTIR spectrum. The Na 2 O·SiO 2 was detected from the SEM. After drying the TiO 2 / SiO 2 hydrosol, the XRD shown that the TiO 2 has an anatase structure and the SiO 2 is amorphous. The TiO 2 /SiO 2 hydrosol can be compactly coated on the GRC surface due to the existence of Na 2 O·SiO 2 binder and exhibited high photocatalytic activity and stability in the degradation of Rhodamine B.
KW - Glass fiber reinforced cement materials
KW - Hydrosol
KW - Photocatalytic
KW - Self-cleaning
UR - http://www.scopus.com/inward/record.url?scp=84896701781&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2013.12.171
DO - 10.1016/j.apsusc.2013.12.171
M3 - 文章
AN - SCOPUS:84896701781
SN - 0169-4332
VL - 298
SP - 19
EP - 25
JO - Applied Surface Science
JF - Applied Surface Science
ER -
