Photocatalytic discoloration of organic compounds on outdoor building cement panels modified by photoactive coatings

Yuranova, T.; Sarria, V.; Jardim, Wilson F.; Rengifo, J.; Pulgarín, C.; Trabesinger, G.; Kiwi, J.

doi:10.1016/j.jphotochem.2006.12.032

Cited by 52 publications

(20 citation statements)

References 13 publications

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“…SiO 2 coated cements but reduced into the mortar microstructure by the filling effect of SiO 2 [52][53][54]. The four samples: CG1-Si-Cem, CG7-Si-Cem, CG13-Si-Cem and TEA-Si-Cem showed a markedly lower RhB initial photodegradation rate as can be observed from Fig.…”

Section: Tablementioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

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a b s t r a c tAn increasingly known application of nanomaterials in the construction industry is related to the photoactivity ability of semiconductors, where nano-anatase TiO 2 is perhaps the most well-known photocatalytic semiconductor and one which possesses a strong oxidizing capability. To analyze the photo-efficiency of four TiO 2 coatings and the effect of SiO 2 interlayer on the mechanic and photocatalytic activity in Rhodamine B (RhB) and NO x photodegradation, two photocatalytic cement series have been prepared. First, cement mortar was coated with three commercial TiO 2 suspensions (GG1, GC7 and CG13) and a home-made titania sol-gel (TEA), and secondly an insertion of a SiO 2 layer was applied on cement surface before spraying the TiO 2 layer.All studied TiO 2 -cements exhibited a significant RhB and NO x photodegradation, arising almost total RhB molar conversions, and upper 53% for NO x photo-oxidation respectively. Nevertheless, although SiO 2 layer deposited in between mortar and TiO 2 -cement did not stabilize the commercial TiO 2 coatings, a good adhesion was observed when silica was applied joint to the home-made titania gel (TEA), probably as a consequence of the interactions encountered between SiO 2 and TiO 2 gels. CG7-Si-Cem exhibited high rate at shorter irradiation times, but TEA-Cem and TEA-Si-Cem can be considered as very interesting and potential photocatalytic mortars due to useful mechanical properties, with a very good coatings adhesion that provides promising outdoor use, and good photo-efficiencies in RhB and NO x photo-oxidation.

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Section: Tablementioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

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“…More recently, the addition of nano-TiO 2 into cement-based material has won great attention due to its chemical stability, high catalytic activity and low price [23][24][25]. However, the recognition of its effects on the properties of cement-based materials was far from satisfactory.…”

Section: Introductionmentioning

confidence: 99%

Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage

Zhang

Cheng

Hou

et al. 2015

Construction and Building Materials

295

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“…The metal oxide nanoparticles such as SiO 2 , TiO 2 , ZnO and Fe 2 O 3 are used as UV blocking agents, antimicrobial agents, water repellents etc. [18][19][20] . The thermodynamic affinity of fibres form noncovalent interactions such as dipolar-dipolar and hydrogen bond, should be the key interactions for the adhesion of silica particles.…”

Section: Introductionmentioning

confidence: 99%

Effect of silica nanoparticles and BTCA on physical properties of cotton fabrics

Nallathambi

Ramachandran²,

Rajendran³

et al. 2011

Mat. Res.

107

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Silica nanoparticles particles were synthesized from rice hulls and characterized. The particles were found to be amorphous in nature, ranging in size from 50 to 100 nm. The concentration of silica nanoparticles, pH and curing time were taken as independent variables to design the experiment. Box-Behnken method has been used to derive the experimental plan and fifteen experiments were conducted. Regression equations have been formed with the dependent and independent variables and the results of all possible combinations have been derived. The combination of optimized concentration of BTCA and SHP were used as crosslinking agent and catalyst respectively and silica nano particles were used to enhance the physical properties of the cotton fabric. The effect of pH and curing time on physical properties were analysed by FTIR studies. By ranking method the best combination of process parameters were identified. From this study, it was observed that higher concentration of silica nanoparticles with BTCA improve the crease recovery angle and tensile strength. FTIR studies revealed that the increase of pH and curing time increases the ester carbonyl band intensity ratio.

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Photocatalytic discoloration of organic compounds on outdoor building cement panels modified by photoactive coatings

Cited by 52 publications

References 13 publications

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage

Effect of silica nanoparticles and BTCA on physical properties of cotton fabrics

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