A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of core/shell TiO2@SiO2 nanoparticles on cement hydration
https://orcid.org/0000-0001-8570-8566
HighlightsA Stöber method was used to synthesize core/shell TiO2@SiO2 nanoparticles.Core/shell TiO2@SiO2 nanoparticles with a uniform coating layer were successfully prepared.Core/shell TiO2@SiO2 nanoparticles accelerated hydration and lowered porosity of cement paste.Core/shell TiO2@SiO2 nanoparticles can better modify cement hydration than nano-TiO2 did.
AbstractTiO2@SiO2 nanoparticles with a core/shell structure widely used in photocatalytic fields were used in this paper to improve the hydration properties of the Portland cement. To this end, the core/shell TiO2@SiO2 nanoparticles were synthesized first and then characterized by a series of techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectra (XPS). Second, the influence of the core/shell TiO2@SiO2 nanoparticles on cement hydration was investigated and compared with nano-TiO2 through isothermal calorimetry, XRD, thermo gravimetric/derivative thermo-gravimetric (TG/DTG) and mercury intrusion porosimetry (MIP) analyses. The results showed that an amorphous SiO2 layer can be deposited uniformly on nano-TiO2 particles by forming new SiOTi chemical bonds at the interface between the SiO2 coating layer and nano-TiO2 particle surface. This uniform layer was conducive to decrease the aggregation of nano-TiO2 effectively. Compared with nano-TiO2, the core/shell TiO2@SiO2 nanoparticles exhibited better hydration properties in terms of accelerated cement hydration, higher degree of hydration and lower porosity, even though both particles modified cement hydration.
Influence of core/shell TiO2@SiO2 nanoparticles on cement hydration
https://orcid.org/0000-0001-8570-8566
HighlightsA Stöber method was used to synthesize core/shell TiO2@SiO2 nanoparticles.Core/shell TiO2@SiO2 nanoparticles with a uniform coating layer were successfully prepared.Core/shell TiO2@SiO2 nanoparticles accelerated hydration and lowered porosity of cement paste.Core/shell TiO2@SiO2 nanoparticles can better modify cement hydration than nano-TiO2 did.
AbstractTiO2@SiO2 nanoparticles with a core/shell structure widely used in photocatalytic fields were used in this paper to improve the hydration properties of the Portland cement. To this end, the core/shell TiO2@SiO2 nanoparticles were synthesized first and then characterized by a series of techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectra (XPS). Second, the influence of the core/shell TiO2@SiO2 nanoparticles on cement hydration was investigated and compared with nano-TiO2 through isothermal calorimetry, XRD, thermo gravimetric/derivative thermo-gravimetric (TG/DTG) and mercury intrusion porosimetry (MIP) analyses. The results showed that an amorphous SiO2 layer can be deposited uniformly on nano-TiO2 particles by forming new SiOTi chemical bonds at the interface between the SiO2 coating layer and nano-TiO2 particle surface. This uniform layer was conducive to decrease the aggregation of nano-TiO2 effectively. Compared with nano-TiO2, the core/shell TiO2@SiO2 nanoparticles exhibited better hydration properties in terms of accelerated cement hydration, higher degree of hydration and lower porosity, even though both particles modified cement hydration.
Influence of core/shell TiO2@SiO2 nanoparticles on cement hydration
https://orcid.org/0000-0001-8570-8566
HighlightsA Stöber method was used to synthesize core/shell TiO2@SiO2 nanoparticles.Core/shell TiO2@SiO2 nanoparticles with a uniform coating layer were successfully prepared.Core/shell TiO2@SiO2 nanoparticles accelerated hydration and lowered porosity of cement paste.Core/shell TiO2@SiO2 nanoparticles can better modify cement hydration than nano-TiO2 did.
AbstractTiO2@SiO2 nanoparticles with a core/shell structure widely used in photocatalytic fields were used in this paper to improve the hydration properties of the Portland cement. To this end, the core/shell TiO2@SiO2 nanoparticles were synthesized first and then characterized by a series of techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectra (XPS). Second, the influence of the core/shell TiO2@SiO2 nanoparticles on cement hydration was investigated and compared with nano-TiO2 through isothermal calorimetry, XRD, thermo gravimetric/derivative thermo-gravimetric (TG/DTG) and mercury intrusion porosimetry (MIP) analyses. The results showed that an amorphous SiO2 layer can be deposited uniformly on nano-TiO2 particles by forming new SiOTi chemical bonds at the interface between the SiO2 coating layer and nano-TiO2 particle surface. This uniform layer was conducive to decrease the aggregation of nano-TiO2 effectively. Compared with nano-TiO2, the core/shell TiO2@SiO2 nanoparticles exhibited better hydration properties in terms of accelerated cement hydration, higher degree of hydration and lower porosity, even though both particles modified cement hydration.
Influence of core/shell TiO2@SiO2 nanoparticles on cement hydration
Sun, Jinfeng (author) / Xu, Kai (author) / Shi, Chaoqi (author) / Ma, Jian (author) / Li, Weifeng (author) / Shen, Xiaodong (author)
Construction and Building Materials ; 156 ; 114-122
2017-08-15
9 pages
Article (Journal)
Electronic Resource
English
Influence of core/shell TiO2@SiO2 nanoparticles on cement hydration
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