Preparation and activity evaluation of B4C/ZnO composite photocatalyst

Köysüren, Özcan; Köysüren, Hafize Nagehan

doi:10.1007/s10971-022-05797-x

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…Simultaneously, photothermal ablation may also occur when the laser radiation in the visible to infrared spectral range (400 nm to 1 μm) is absorbed and causes rapid heating of a material above the boiling point such that vapor is formed 23,31,32 . Although the literature suggested that B 4 C and MoAlB may have strong absorption within the ultraviolet spectrum, the infrared wavelength has been successfully used in laser ablation of ceramic materials 33,34 . Nedialkov et al.…”

Section: Resultsmentioning

confidence: 99%

“…23,31,32 Although the literature suggested that B 4 C and MoAlB may have strong absorption within the ultraviolet spectrum, the infrared wavelength has been successfully used in laser ablation of ceramic materials. 33,34 for Al 2 O 3 . 25 There are two dominant mechanisms of laser absorption: (a) inverse bremsstrahlung where photons are absorbed by free electrons, and (b) photoionization that causes dissociation into electrically charged particles.…”

Section: Surface Characterizationmentioning

confidence: 99%

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Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces

Ruiz,

Yoo,

Wadle

et al. 2023

J Am Ceram Soc.

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Through a novel laser ablative patterning (LAP) process, the present work reported the increase in wetting contact angle of two ceramic materials, boron carbide (B4C) and molybdenum aluminum boride (MoAlB). The LAP technique employed picosecond laser pulses to form a crosshatch pattern with micropillars on ceramic surfaces. The wetting behavior of both ceramic surfaces was successfully transitioned from hydrophilic (θ < 90°) to hydrophobic (θ > 90°), which was related to Wenzel and Cassie–Baxter mechanisms. Parameters such as laser fluence and number of laser scans were varied to study their effects on ceramic surface characteristics. Lunar dust adhesion experiments were performed on these hydrophobic ceramic surfaces, which showed that the adhesion of lunar soil simulant dust particles was significantly reduced in the patterned B4C and MoAlB surfaces.

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Section: Resultsmentioning

confidence: 99%

Section: Surface Characterizationmentioning

confidence: 99%

Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces

Ruiz,

Yoo,

Wadle

et al. 2023

J Am Ceram Soc.

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Photoreduction of Cr(VI) on B4C/AgFe2O4 composite

Köysüren

Köysüren²

2022

J Sol-Gel Sci Technol

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Transparent self-cleaning coating prepared from SiO2/B4C and SiO2/B4C/TiO2 for the solar cell

Koysuren,

Koysuren

2024

J Sol-Gel Sci Technol

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Transparent self-cleaning coatings based on photocatalytic activity have attracted great attention in recent years owing to their promising applications in many fields, such as solar cell cover glass. This study reports a simple method to prepare transparent self-cleaning silicon dioxide (SiO2) coatings filled by boron carbide (B4C) and titanium dioxide (TiO2) nanoparticles. A sol-gel technique was used to synthesize a SiO2 solution containing B4C and TiO2 nanoparticles, and a dip-coating technique was followed to coat the composite solution on glass slides. The SiO2 coating was successfully obtained in the presence of both semiconductor nanoparticles as confirmed by FTIR and XRD measurements. Both the photocatalytic activity and self-cleaning property of the composite coatings were evaluated by photocatalytic degradation of a model dye, methylene blue, under visible light irradiation. The SiO2 coating containing both B4C and TiO2 nanoparticles exhibited an improved photocatalytic activity compared to the SiO2 coating including only B4C. In particular, a 46% degradation rate of the model dye methylene blue was achieved for the SiO2 coating containing 15 wt% B4C and 5 wt% TiO2 nanoparticles. Highly transparent composite coatings on glass slides were prepared. The SiO2 coating containing both B4C and TiO2 nanoparticles was found to exhibit ~8% reduction in the optical transmission of the glass slide and ~1% reduction in the efficiency of a solar cell containing the coated glass slide. These findings demonstrated that the SiO2 composite coatings have potential for self-cleaning applications in removing contaminants from the glass cover of the solar cell under visible light irradiation. Graphical Abstract

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Preparation and activity evaluation of B4C/ZnO composite photocatalyst

Cited by 8 publications

References 42 publications

Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces

Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces

Photoreduction of Cr(VI) on B4C/AgFe2O4 composite

Transparent self-cleaning coating prepared from SiO2/B4C and SiO2/B4C/TiO2 for the solar cell

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Preparation and activity evaluation of B4C/ZnO composite photocatalyst

Cited by 8 publications

References 42 publications

Laser ablative patterning of B4C and MoAlB ceramics for hydrophobic surfaces

Laser ablative patterning of B4C and MoAlB ceramics for hydrophobic surfaces

Photoreduction of Cr(VI) on B4C/AgFe2O4 composite

Transparent self-cleaning coating prepared from SiO2/B4C and SiO2/B4C/TiO2 for the solar cell

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Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces

Laser ablative patterning of B₄C and MoAlB ceramics for hydrophobic surfaces