Smart protection of surfaces during day-night by a novel composite self-cleaning coating with catalytic memory

Mokhtarifar, Maryam; Nguyen, Duc Trung; Sakar, M.; Lucotti, Andrea; Asa, Marco; Kaveh, Reyhaneh; Diamanti, Maria Vittoria; Pedeferri, MariaPia; Do, Trong‐On

doi:10.1016/j.jece.2021.106891

Cited by 8 publications

(2 citation statements)

References 91 publications

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“…The RCPs act as photo-induced charge traps, enabling the enhancement of light absorption and the increase in active sites of photocatalysis, while also increasing the storage capacity of electricity to achieve higher photocatalytic activity. Mokhtarifar et al 68 successfully improved the performance of TiO 2 /WO 3 photocatalyst by using soft templates and hydrogen treatment methods, as well as incorporating Pt plasma nanoparticles as a cocatalyst. The composite catalyst demonstrated efficient self-cleaning performance under both sunlight and low-light conditions, by expanding the visible light absorption through the synergy of the composite system (TiO 2 , WO 3 and Pt).…”

Section: Strategies Of Modifying Tio 2 To Improve ...mentioning

confidence: 99%

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Wei

Meng

et al. 2023

RSC Adv.

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Section: Strategies Of Modifying Tio 2 To Improve ...mentioning

confidence: 99%

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Wei

Meng

et al. 2023

RSC Adv.

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“…11 Similarly, it is proposed that the fundamental process of dark photocatalysis is mainly due to the release of stored electrons (that are stored during light irradiation) back into the reaction medium when the light irradiation is stopped. 12 It is claimed that this electron storage often happens at the defect sites of the materials that possibly form an energy band underneath the conduction band with appropriate energy capable of involving the reduction reaction to facilitate or continue the catalytic process under the given dark condition. Therefore, it can be realized that dark photocatalysis can be possible and efficient only if the electrons are stored in an appropriate energy level rather than merely storing it in a random energy level.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Photocatalytic Memory Effect of Magneto-Plasmonic Ag–Fe₃O₄@TiO₂ Ternary Nanocomposites for Dye Degradation and H₂ Production under Light and Dark Conditions

et al. 2022

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This study explores the preparation of Ag plasmons-sensitized magnetic-Fe 3 O 4 integrated TiO 2 (Ag−Fe 3 O 4 @TiO 2 ) ternary nanocomposites and their defectinduced electron storage properties to exploit their photocatalytic memory effect toward dye degradation and H 2 generation under light and dark conditions. The crystalline phase formation and elemental states of the individual materials and elements in the nanocomposite are analyzed using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The existence of Ti and Fe ions with dual oxidation states of Ti 4+/3+ and Fe 3+/2+ , respectively, is observed by XPS, which revealed the presence of defects in the system. The observed red shift along with a distinct plasmonic band (corresponding to metallic Ag nanoparticles) in the UV−visible absorption spectrum and the observed modified radiative recombination emission in the PL spectrum confirmed the plasmon-driven visible light activity along with the improved carrier separation and transfer characteristics in the synthesized ternary composite. Accordingly, the Ag− Fe 3 O 4 @TiO 2 photocatalyst degraded almost 100% of MB (methylene blue) and RhB (rhodamine B) dyes under simulated solar light in 90 min, while it is found to be around 42% and 36% in 60 min under dark conditions, respectively (which is preirradiated for 60 min). Further, it produced H 2 at the rate of 911 μmol g −1 h −1 under light conditions and is decreased to ∼96 μmol g −1 h −1 under dark conditions which is preirradiated for 1 h. However, when the composite is preirradiated for 3 h, it showed a maximum H 2 evolution of 144 μmol g −1 h −1 under dark. Further, the photocurrent and electrochemical impedance under light and dark conditions suggested the mechanism of photocatalytic charge storage and transfer process in the composite. Although the photocatalytic memory effect of the composite is meager toward H 2 production due to the insufficient potential of the stored−released electrons to reduce the protons (2H + ) to H 2 under dark conditions, their degradation efficiency is considerably good.

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Epoxy‐based coatings containing bentonite and ZnO obtained by modified solution blow spinning

Zárate,

Veras,

Nascimento

et al. 2024

J of Applied Polymer Sci

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Active coatings have been extensively studied due to their ability to contain active substances that can promote ab/adsorption and/or catalysis of compounds of interest. In this work, solution blow spraying (SBSp), which is a modification of the solution blow spinning (SBS), was used to produce active coatings via a multistep process: The first stage consisted in applying a cross‐linkable polymer layer (epoxy) to a metallic substrate, followed by heating at 50°C to promote partial cross‐linking; in the second step, particle suspensions containing zinc oxide (ZnO) and/or bentonite/ZnO were sprayed over the resin layer so that particles adhered to the surface rather than embedded in, what would reduce surface activity. Primarily, rheology of the suspensions and resin cure were characterized by rheometry and differential scanning calorimetry (DSC), respectively. Infrared spectroscopy and scanning electron microscopy of the ZnO synthesized by the Pechini method was performed. Coatings were analyzed by optical microscopy (OM), scanning electron microscopy (SEM), and x‐ray diffraction (XRD). Based on the suspension studies, the optimized particle concentration was found to be 10 wt% in water. Thermal analysis of resin showed the ideal time and temperature of 16 min or 33 min at 50°C. Using these variables, active coatings with ZnO and bentonite/ZnO particles exposed to the surface were successful produced by SBSp.

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Smart protection of surfaces during day-night by a novel composite self-cleaning coating with catalytic memory

Cited by 8 publications

References 91 publications

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Insights into the Photocatalytic Memory Effect of Magneto-Plasmonic Ag–Fe₃O₄@TiO₂ Ternary Nanocomposites for Dye Degradation and H₂ Production under Light and Dark Conditions

Epoxy‐based coatings containing bentonite and ZnO obtained by modified solution blow spinning

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Smart protection of surfaces during day-night by a novel composite self-cleaning coating with catalytic memory

Cited by 8 publications

References 91 publications

Recent advances in photocatalytic self-cleaning performances of TiO2-based building materials

Recent advances in photocatalytic self-cleaning performances of TiO2-based building materials

Insights into the Photocatalytic Memory Effect of Magneto-Plasmonic Ag–Fe3O4@TiO2 Ternary Nanocomposites for Dye Degradation and H2 Production under Light and Dark Conditions

Epoxy‐based coatings containing bentonite and ZnO obtained by modified solution blow spinning

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Product

Resources

About

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Recent advances in photocatalytic self-cleaning performances of TiO₂-based building materials

Insights into the Photocatalytic Memory Effect of Magneto-Plasmonic Ag–Fe₃O₄@TiO₂ Ternary Nanocomposites for Dye Degradation and H₂ Production under Light and Dark Conditions