Preparation and photocatalytic activity of chemically-bonded phosphate ceramics containing TiO2

Martins, Monize Aparecida; Lima, Bruna de Oliveira de; Ferreira, Leticia Patrício; Colonetti, Emerson; Feltrin, Jucilene; Noni, Agenor De

doi:10.1016/j.apsusc.2017.01.239

Cited by 21 publications

(2 citation statements)

References 49 publications

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“…Due to their low curing temperature, ease of application, and corrosion resistance, chemically bonded ceramic coatings (CBCCs) have been widely used in the aerospace and automotive industries and in the military. [1][2][3] However, the evaporation of solvents generates micropores and microcracks in ceramic coatings during the curing process, reducing the corrosion resistance of the coatings. Therefore, extensive studies have been conducted to enhance the anticorrosion performance by adding nanofillers to the ceramic coatings.…”

Section: Introductionmentioning

confidence: 99%

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

Guo¹,

Wang²,

Sun³

2022

Materials & Corrosion

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In this study, nano-alumina/graphene oxide (GO-Al 2 O 3 ) nanohybrids were synthesized and incorporated into a ceramic matrix to enhance the anticorrosion performance of chemically bonded ceramic coatings. The interaction between GO and nano-Al 2 O 3 was investigated using Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy. Results showed that nano-Al 2 O 3 was successfully decorated on the surface of GO through chemical bonds, which improved the bonding strength between GO and the ceramic matrix through the reaction of the aluminum phosphate binder with nano-Al 2 O 3 . The unique structures of the GO-Al 2 O 3 nanohybrids endowed the ceramic coatings with superior anticorrosion properties as compared to the untreated substrate and pure ceramic coatings. The best corrosion resistance of coatings was achieved when the content of the GO-Al 2 O 3 nanohybrids was 0.6 wt%, which led to the highest protection efficiency (93.4%) and the smallest corrosion current (i corr ). The improvement in the corrosion resistance of the ceramic coatings was attributed to the excellent compatibility and dispersibility of the GO-Al 2 O 3 nanohybrids in the ceramic matrix. In addition, the greater bonding strength between the GO-Al 2 O 3 nanohybrids and ceramic matrix could enable more fracture energy to be consumed. This in turn could block or change the diffusion pathway of cracks, resulting in higher corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

Guo¹,

Wang²,

Sun³

2022

Materials & Corrosion

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“…While most of the literature on photocatalysis has so far involved free nanostructured powders, the preparation of stable and active photocatalytic macroscopic structures is regarded as a key step towards developing effective photocatalytic devices with good recyclability. In this respect, film deposition on a variety of substrates is one of the most investigated approaches, especially on glass [4,5], ceramics [6,7], titanium [8,9] and steel [10,11]. Aluminum substrates are economical, lightweight, versatile, electrically conductive and are widely applied in numerous technologies.…”

Section: Introductionmentioning

confidence: 99%

Self-cleaning, photocatalytic films on aluminum plates for multi-pollutant air remediation: promoting adhesion and activity by SiO₂ interlayers

Cionti¹,

Cosaert²,

Deshayes³

et al. 2021

Nanotechnology

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In recent years, nanoparticles have come under close scrutiny for their possible health and environmental issues, making them less attractive for photocatalytic applications in air or water purification. Replacing free nano-powders with active and stable films is thus a fundamental step towards developing effective photocatalytic devices. Aluminum represents a cheap and technologically-relevant substrate, but its photocatalytic applications have been hampered by adhesion issues and metal ion diffusion within the photocatalytic layer. In this work, the use of silica interlayers is investigated as a strategy to promote adhesion, efficiency and reusability of TiO 2 films deposited on aluminum plates. Films were prepared from stable titania sols to avoid the use of nano-powders. Aluminum substrates with different surface morphology were investigated and the role of the silica interlayer thickness was studied. Films were extensively characterized, studying their structure, morphology, optical properties, adhesion and hardness. Self-cleaning properties were studied with respect to their superhydrophilicity and ability to resist fouling via alkylsilanes.Photocatalytic degradation tests were carried out using both volatile organic compounds (VOC) and NOx, also in recycle tests. The presence of the silica interlayer proved crucial to promote the film

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Application of recycled lanthanum-doped TiO2 immobilized on commercial air filter for visible-light photocatalytic degradation of acetone and NO

Kang

Chang

et al. 2019

Applied Surface Science

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Preparation and photocatalytic activity of chemically-bonded phosphate ceramics containing TiO2

Cited by 21 publications

References 49 publications

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

Self-cleaning, photocatalytic films on aluminum plates for multi-pollutant air remediation: promoting adhesion and activity by SiO₂ interlayers

Application of recycled lanthanum-doped TiO2 immobilized on commercial air filter for visible-light photocatalytic degradation of acetone and NO

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Preparation and photocatalytic activity of chemically-bonded phosphate ceramics containing TiO2

Cited by 21 publications

References 49 publications

GO‐Al2O3 nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

GO‐Al2O3 nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

Self-cleaning, photocatalytic films on aluminum plates for multi-pollutant air remediation: promoting adhesion and activity by SiO2 interlayers

Application of recycled lanthanum-doped TiO2 immobilized on commercial air filter for visible-light photocatalytic degradation of acetone and NO

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Product

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About

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

GO‐Al₂O₃ nanohybrids to enhance the anticorrosion performance of chemically bonded ceramic coatings

Self-cleaning, photocatalytic films on aluminum plates for multi-pollutant air remediation: promoting adhesion and activity by SiO₂ interlayers