Nanodispersed TiO2 hydrosol modified Portland cement paste: The underlying role of hydration on self-cleaning mechanisms
Source abstract
Abstract
The self-cleaning performance of photocatalytic cement paste is related to the dispersion of nano-TiO2 in the hardened matrix. This work aims to study the influences of Portland cement hydration on the self-cleaning behaviour of acidic anatase TiO2 hydrosol modified hardened Portland cement paste (HPCP), and the working mechanisms. The presence of TiO2 hydrosol results in the retardation of hydration at early age and better self-cleaning performance of HPCP. The additional surface defects of TiO2 in HPCP are the main reason of self-cleaning performance enhancement. The morphology and the pore size distribution of hydration products also contribute to the enhancement of self-cleaning performance by the surface electron capture effect, which are supported by the analyses of Confocal Raman Microscopy and Scanning Electron Microscope. A new mechanism is suggested to explain the role of photocatalytic property and cement hydration on the enhancement of self-cleaning performance of HPCP with different concentration of TiO2 hydrosol.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · TiO2 Photocatalysis and Solar Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (100+)
Show source-provided references
1. Aging of reflective roofs: soot deposition10.1364/AO.41.002355 ↗
2. Soiling of building envelope surfaces and its effect on solar reflectance - part II: development of an accelerated aging method for roofing materials10.1016/j.solmat.2013.11.028 ↗
3. Field study of NOx degradation by a mineral-based air purifying paint10.1016/j.buildenv.2018.06.014 ↗
4. NOx photocatalytic degradation employing concrete pavement containing titanium dioxide10.1016/j.apcatb.2010.01.002 ↗
5. Photocatalytic construction and building materials: from fundamentals to applications10.1016/j.buildenv.2009.01.002 ↗
6. Synthesis, characterization and particle size distribution of TiO2 colloidal nanoparticles10.1016/j.colsurfa.2011.03.064 ↗
7. TiO2 hydrosols with high activity for photocatalytic degradation of formaldehyde in a gaseous phase10.1016/j.jhazmat.2007.07.003 ↗
8. Production of stable hydrosols of crystalline TiO2 nanoparticles synthesized at relatively low temperatures in diverse media10.1016/j.apsusc.2012.11.003 ↗
9. Stable hydrosols for TiO2 coatings10.1007/s10971-010-2301-y ↗
10. Desorption behavior of methylene blue on pyromellitic dianhydride modified biosorbent by a novel eluent: acid TiO2 hydrosol10.1016/j.jhazmat.2009.12.021 ↗
11. Influence of pH on the formulation of TiO2 nano-crystalline powders with high photocatalytic activity10.1016/j.powtec.2013.10.040 ↗
12. The role of poly(methacrylic acid) conformation on dispersion behavior of nano TiO2 powder10.1016/j.apsusc.2011.11.107 ↗
13. Dispersion properties of TiO2 nano-powder synthesized by homogeneous precipitation process at low temperatures10.1016/S0927-7757(03)00077-3 ↗
14. Adsorption of acid Orange 7 on the surface of titanium dioxide10.1021/la051434g ↗
15. Stability of TiO2 hydrosols synthesized by hydrolysis of titanium tetraethoxide10.1016/S0927-7757(96)03958-1 ↗
16. Coagulation peculiarities and fractionation of nanodispersed titanium dioxide hydrosol
17. Study of the stable nanocrystalline TiO2 hydrosol and its fractions10.1007/s10971-005-1311-7 ↗
18. Kinetics of titanium dioxide precipitation by thermal hydrolysis10.1016/0021-9797(86)90005-6 ↗
19. Z. Wang, P. Feng, H. Chen, Q. Yu, Photocatalytic performance and dispersion stability of nanodispersed TiO2 hydrosol in electrolyte solutions with different cations, J. Environ. Sci.. (n.d.). doi:https://doi.org/10.1016/j.jes.2019.07.013.10.1016/j.jes.2019.07.013 ↗
20. Colloidal stability of nanosized titania aqueous suspensions10.1016/j.jeurceramsoc.2008.02.017 ↗
21. Influence of surface conductivity on the apparent zeta potential of TiO2 nanoparticles10.1016/j.jcis.2011.01.016 ↗
22. Electrolyte-induced destabilization of hydrosols containing uniform TiO2 nanoparticles10.1134/S1061933X07040114 ↗
23. Characterization and surface-reactivity of nanocrystalline anatase in aqueous solutions10.1021/la061774h ↗
24. Role of ammonium ions on the stability of TiO 2 sol
25. Mechanisms of cement hydration
26. Influence of additions of anatase TiO2 nanoparticles on early-age properties of cement-based materials10.3141/2141-08 ↗
27. Influence of TiO2 nanoparticles on early C3S hydration10.1111/j.1551-2916.2010.03868.x ↗
28. Hydration and properties of nano-TiO2 blended cement composites10.1016/j.cemconcomp.2012.02.009 ↗
29. Nanoparticles and apparent activation energy of Portland cement10.1111/jace.12878 ↗
30. Influences of nano-TiO2 on the properties of cement-based materials: hydration and drying shrinkage10.1016/j.conbuildmat.2015.02.003 ↗
31. The performance of a self-cleaning cool cementitious surface10.1016/j.enbuild.2015.06.025 ↗
32. Self-cleaning properties of cement plates loaded with N,C-modified TiO2 photocatalysts10.1016/j.apsusc.2014.12.113 ↗
33. Self-cleaning engineered cementitious composites10.1016/j.cemconcomp.2015.09.007 ↗
34. Photocatalytic and self-cleaning activity of colored mortars containing TiO210.1016/j.conbuildmat.2013.04.038 ↗
35. Long term self-cleaning and photocatalytic performance of anatase added mortars exposed to the urban environment10.1016/j.conbuildmat.2015.08.028 ↗
36. Self-cleaning and mechanical properties of modified white cement with nanostructured TiO210.1166/jnn.2013.7586 ↗
37. TiO2 photocatalysis in cementitious systems: insights into self-cleaning and depollution chemistry10.1016/j.cemconres.2011.12.001 ↗
38. Hydrophobic photocatalytic composite coatings based on nano-TiO2 hydrosol and aminopropyl terminated polydimethylsiloxane prepared by a facile approach10.1016/j.matlet.2018.05.103 ↗
39. TiO2 cement-based materials: understanding optical properties and electronic band structure of complex matrices10.1016/j.cattod.2016.11.015 ↗
40. Characteristics and efficiency of photocatalytic cementitious materials: type of binder, roughness and microstructure10.1016/j.cemconres.2015.02.003 ↗
41. Microstructural and photocatalytic characterization of cement-paste sol-gel synthesized titanium dioxide10.1007/s11709-015-0326-6 ↗
42. Photocatalyst efficiencies in concrete technology: the effect of photocatalyst placement10.1016/j.apcatb.2017.10.013 ↗
43. Photocatalytic performance and dispersion stability of nanodispersed TiO2 hydrosol in electrolyte solutions with different cations10.1016/j.jes.2019.07.013 ↗
44. TiO2-assisted photodegradation of dyes: a study of two competitive primary processes in the degradation of RB in an aqueous TiO2 colloidal solution10.1016/S1381-1169(97)00185-4 ↗
45. Photocatalysis through excitation of adsorbates. 1. Highly efficient N-deethylation of rhodamine B adsorbed to CdS10.1021/j100534a012 ↗
46. Characteristics and efficiency of photocatalytic cementitious materials: type of binder, roughness and microstructure10.1016/j.cemconres.2015.02.003 ↗
47. Characterization of bioactive RGD peptide immobilized onto poly (acrylic acid) thin films by plasma polymerization10.1016/j.apsusc.2010.07.040 ↗
48. Tracking areal lithium densities from neutron activation – quantitative Li determination in self-organized TiO2 nanotube anode materials for Li-ion batteries10.1039/C7CP00180K ↗
49. Titanium oxide aerogels prepared from titanium metal and hydrogen peroxide10.1016/S0167-577X(97)00181-X ↗
50. Oxygen rich Titania: a dopant free, high temperature stable, and visible-light active anatase photocatalyst10.1002/adfm.201100301 ↗
51. Surface ionization and complexation at the oxide/water interface I. computation of electrical double layer properties in simple electrolytes10.1016/S0021-9797(78)80009-5 ↗
52. Adsorption of poly(acrylic acid) onto the surface of titanium dioxide and the colloidal stability of aqueous suspension10.1016/j.jcis.2004.08.075 ↗
53. Effects of the charge characteristics of polycarboxylate superplasticizers on the adsorption and the retardation in cement pastes10.1016/j.cemconres.2014.10.004 ↗
54. Hydration of Portland cement compounds10.1021/ie50296a007 ↗
55. Advances in understanding hydration of Portland cement10.1016/j.cemconres.2015.05.025 ↗
56. Hydration of cementitious materials, present and future10.1016/j.cemconres.2011.03.026 ↗
57. Impact of admixtures on the hydration kinetics of Portland cement10.1016/j.cemconres.2011.03.005 ↗
58. Surface charge and interfacial potential of titanium dioxide nanoparticles: experimental and theoretical investigations10.1016/j.jcis.2013.06.015 ↗
59. Effect of highly carboxylated colloidal polymers on cement hydration and interactions with calcium ions10.1016/j.cemconres.2018.08.010 ↗
60. Effects of polycarboxylate superplasticizers with different molecular structure on the hydration behavior of cement paste10.1016/j.conbuildmat.2015.12.178 ↗
61. A study on the hydration of Portland limestone cement by means of TG10.1023/A:1010139312958 ↗
62. Hydration of ordinary Portland cements made from raw mix containing transition element oxides10.1016/S0008-8846(97)00250-0 ↗
63. Investigation of blended cement hydration by isothermal calorimetry and thermal analysis10.1016/j.cemconres.2004.10.027 ↗
64. Influence of pozzolans and slag on the microstructure of partially carbonated cement paste by means of water vapour and nitrogen sorption experiments and BET calculations10.1016/j.cemconres.2010.08.014 ↗
65. The use of DTA/TGA to study the effects of ground quartz with different surface areas in autoclaved cement: quartz pastes. Part 1: a method for evaluating DTA/TGA results10.1016/S0040-6031(96)03033-X ↗
66. Characterization of the hydrothermally synthesized nano-TiO2 crystallite and the photocatalytic degradation of Rhodamine B10.1016/j.jhazmat.2005.08.027 ↗
67. Photocatalytic degradation of rhodamine dyes with nano-TiO210.1021/ie060948n ↗
68. Rhodamine B discolouration on TiO2 in the cement environment: a look at fundamental aspects of the self-cleaning effect in concretes
69. Correlations for photocatalytic activity and spectral features of the absorption band edge of TiO2 modified by thiourea10.1016/j.apcatb.2009.06.015 ↗
70. Band-gap energy estimation from diffuse reflectance measurements on sol-gel and commercial TiO2: a comparative study10.1007/s10971-011-2582-9 ↗
71. Importance of the band gap energy and flat band potential for application of modified TiO2 photoanodes in water photolysis10.1016/j.jpowsour.2007.10.082 ↗
72. TiO2 functionalization for efficient NOx removal in photoactive cement10.1016/j.apsusc.2014.07.162 ↗
73. Urbach tail and bandgap analysis in near stoichiometric LiNbO3 crystals
74. Electrical and optical properties of rutile single crystals10.1103/PhysRev.87.876 ↗
75. The long-wavelength edge of photographic sensitivity and of the electronic absorption of solids10.1103/PhysRev.92.1324 ↗
76. Mehta · 2006
77. NOx degradation by photocatalytic mortars: the underlying role of the CH and C-S-H carbonation10.1016/j.cemconres.2019.105805 ↗
78. Mineralogical characteristics of Ettringites synthesized from solutions and suspensions10.1016/j.cemconres.2004.04.037 ↗
79. Ettringite formation and microstructure of rapid hardening cement10.1016/j.cemconres.2004.04.021 ↗
80. Morphological development of hydrating tricalcium silicate as examined by electron microscopy techniques10.1111/j.1151-2916.1981.tb10219.x ↗
81. Mechanism of sulfate attack on Portland cement concrete- another look10.1016/0008-8846(83)90040-6 ↗
82. Agglomeration and sedimentation of titanium dioxide nanoparticles (n-TiO2) in synthetic and real waters10.1007/s11051-013-1684-4 ↗
83. An evaluation of the incorporation of a titanium dioxide producer’s waste material in Portland cement clinker10.1016/S0167-577X(02)00723-1 ↗
84. Incorporation mechanism of titanium in Portland cement clinker and its effects on hydration properties10.1016/j.conbuildmat.2017.03.129 ↗
85. In situ characterization of main reaction products in alkali-activated slag materials by Confocal Raman Microscopy10.1016/j.cemconcomp.2019.02.004 ↗
86. New insights in weathering analysis of anhydrous cements by using high spectral and spatial resolution Confocal Raman Microscopy10.1016/j.cemconres.2017.06.003 ↗
87. Confocal Raman microscopy as a non-destructive tool to study microstructure of hydrating cementitious materials10.1016/j.cemconres.2016.07.005 ↗
88. Chemical mapping of cement pastes by using confocal Raman spectroscopy10.1007/s11709-015-0323-9 ↗
89. Single crystal laser Raman spectroscopy
90. Raman spectrum of anatase, TiO210.1002/jrs.1250070606 ↗
91. Hydration of tricalcium aluminate (C3A) in the presence and absence of gypsum - studied by Raman spectroscopy and X-ray diffraction10.1039/b509904h ↗
92. A Raman study of the sulfated cement hydrates: ettringite and monosulfoaluminate10.3151/jact.5.299 ↗
93. Raman and infrared spectra of carbonates of calcite structure10.1002/jrs.1518 ↗
94. In situ Raman studies on cement paste prepared with natural pozzolanic volcanic ash and ordinary Portland cement10.1016/j.conbuildmat.2017.05.016 ↗
95. Raman spectroscopy study on the hydration behaviors of Portland cement pastes during setting
96. Shedding light onto the spectra of lime: Raman and luminescence bands of CaO, Ca(OH)2 and CaCO310.1002/jrs.4622 ↗
97. Raman spectroscopy of cementitious materials
98. TiO2 based nano-photocatalysis immobilized on cellulose substrates10.1016/j.jphotochem.2013.11.013 ↗
99. Photoassisted degradation of dye pollutants. V. Self-photosensitized oxidative transformation of Rhodamine B under visible light irradiation in aqueous TiO2 dispersions10.1021/jp980922c ↗
100. Photogeneration of highly amphiphilic TiO2 surfaces10.1002/(SICI)1521-4095(199801)10:2<135::AID-ADMA135>3.0.CO;2-M ↗