Admicellar polymerization of a co-fluoropolymer ultrathin film on TiO2 nanoparticles for use as a photocatalytic cement

Yuenyongsuwan, Jirayu; O’Rear, Edgar A.; Pongprayoon, Thirawudh

doi:10.1016/j.surfin.2021.101172

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…The application of TiO 2 films as hydrophilic and self-cleaning coatings has been extensively investigated, especially when deposited on glass surfaces [22][23][24], ceramic surfaces [25][26][27][28], and others. However, with regard to cement surfaces (fiber cement) studies in the scientific literature are scarce to date [29][30][31][32]. In this scenario, this study aimed to evaluate the photocatalytic activity of TiO 2 films deposited on cementitious surfaces (fiber cement) and their ability to inhibit the growth of various pathogens causing hospital infections and losses in the food industry.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and Antimicrobial Activity of TiO2 Films Deposited on Fiber-Cement Surfaces

et al. 2023

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In this study, TiO2 films were deposited via the doctor blade technique on fiber-cement surfaces. Two types of nanoparticles (TiO2-P25 from Degussa and TiO2-PC105 from Tronox) were used to produce films. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) images revealed films with homogeneous and nanoparticulated morphology. The TiO2 PC105 film presented a lower roughness parameter (RMS) in relation to that of the TiO2 P25-based film. Both films exhibited high hydrophilicity when exposed to UV-A radiation (contact angle θ < 6°). The photocatalytic activity of the films was evaluated by standardized methylene blue dye degradation assays under UV-A irradiation (1.0 mW/cm2). The TiO2-PC105 film showed a photonic efficiency of ξ = 0.1%, while for the films obtained with TiO2-P25, ξ = 0.08%. The cement surface modified with the PC105 film was evaluated for antimicrobial activity through the use of multiple pathogens commonly found in hospitals. A considerably high efficiency was measured with visible light. Growth inhibition rates of 99.0% ± 0.2, 99.1% ± 0.2, 99.1% ± 0.2, 97.5% ± 0.5, 98.0% ± 0.5 and 98.0% ± 0.5 were found for Staphylococcus aureus, Klebsiella sp., Escherichia coli, Rhizobium sp., Fusarium sp. and Penicillium sp., respectively. The results show the self-cleaning ability and their potential use for protection, by preventing contamination of the fiber-cement surface and opening new possibilities for the use of this building material.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic and Antimicrobial Activity of TiO2 Films Deposited on Fiber-Cement Surfaces

et al. 2023

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The preparation of dodecyl trimethyl ammonium bromide modified titanium dioxide for the removal of uranium

Wang

Jiang

2022

Environ Sci Pollut Res

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Radioactive contamination, especially the pollution of uranium, is threatening the ecological environment.How to e cient and quickly remove the uranium from the environment is a problem to be solved. In this study, the dodecyl trimethyl ammonium bromide embellished titanium dioxide composite (DTAB/TiO 2 ) was synthesized as an adsorbent to adsorb uranium from water. The DTAB/TiO 2 composite was composed of nanoparticles and presented a spherical morphology of rough surface. The removal of U(VI) on DTAB/TiO 2 was a monolayer adsorption process and the removal process was dependent on solution pH. The capture of U(VI) enhanced with the increase of temperature, indicating an endothermic process.According to the Langmuir model, the removal capacity of DTAB/TiO 2 for U(VI) reached 108.4 mg/g. The surface oxygen-containing functional groups, especially hydroxyl groups, played a crucial role in the capture of U(VI). This work can provide useful information for the cleanup of uranium and expand the application of surfactants.

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Toxicity aspects, disposal, recycling, environmental, safety, and health issues of fluoropolymer nanocomposites

Ghasem

2023

Advanced Fluoropolymer Nanocomposites

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Admicellar polymerization of a co-fluoropolymer ultrathin film on TiO2 nanoparticles for use as a photocatalytic cement

Cited by 4 publications

References 36 publications

Photocatalytic and Antimicrobial Activity of TiO2 Films Deposited on Fiber-Cement Surfaces

Photocatalytic and Antimicrobial Activity of TiO2 Films Deposited on Fiber-Cement Surfaces

The preparation of dodecyl trimethyl ammonium bromide modified titanium dioxide for the removal of uranium

Toxicity aspects, disposal, recycling, environmental, safety, and health issues of fluoropolymer nanocomposites

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