The effect of annealing and layer numbers on the optical and electrical properties of cobalt-doped TiO<sub>2</sub> thin films

Mozaffari, Niloofar; Elahi, S. Hossein; Parhizgar, Sara Sadat; Mozaffari, Nastaran; Elahi, Seyed Mohammad

doi:10.1088/2053-1591/ab4662

Cited by 10 publications

(6 citation statements)

References 114 publications

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“…However, the band gap of rutile TiO 2 modified wool powders was slightly reduced compared with the pure rutile TiO 2 particles [30]. The difference in the band gaps between the keratin char-TiO 2 composite film and TiO 2 film might be attributed to their different structures, crystallite sizes, electron mobility abilities, and activation energies [52].…”

Section: Separation Efficiency Of Photogenerated Electron-hole Pairsmentioning

confidence: 95%

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Zhang

et al. 2021

Catalysts

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In this study, the photocatalytic properties of novel keratin char-TiO2 composite films, made through the calcination of wool keratin coatings containing TiO2 precursors at 400 °C, were investigated for the photodegradation of organic contaminants under visible light irradiation. Its structural characteristics and photocatalytic performance were systematically examined. It was shown that a self-cleaning hydrophobic keratin char-TiO2 composite film containing meso- and micro-pores was formed after the keratin—TiO2 precursors coating was calcined. In comparison with calcinated TiO2 films, the keratin char-TiO2 composite films doped with the elements of C, N, and S from keratins resulted in decreased crystallinity and a larger water contact angle. The bandgap of the char-TiO2 composite films increased slightly from 3.26 to 3.32 eV, and its separation of photogenerated charge carriers was inhibited to a certain degree. However, it exhibited higher photodegradation efficiency to methyl blue (MB) effluents than the pure calcinated TiO2 films. This was mainly because of its special porous structure, large water contact angle, and high adsorption energy towards organic pollutants, confirmed by the density functional theory calculations. The main active species were 1O2 radicals in the MB photodegradation process.

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Section: Separation Efficiency Of Photogenerated Electron-hole Pairsmentioning

confidence: 95%

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Zhang

et al. 2021

Catalysts

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“…It is a component of vitamin B12, which helps alleviate anemia by promoting the development of red blood cells [24]. Cobalt's unusual optical, magnetic, catalytic, and electrical properties make it ideal for nanosensors and nanoelectronics fields [25][26][27]. Cobalt is valuable in many sectors because of its CO 2+ , CO 3+ , and CO 4+ oxidation states [28].…”

Section: Introductionmentioning

confidence: 99%

Marine Algae Extract (Grateloupia Sparsa) for the Green Synthesis of Co₃O₄NPs: Antioxidant, Antibacterial, Anticancer, and Hemolytic Activities

Hajri

Albalawi

Alsharif

et al. 2022

Bioinorganic Chemistry and Applications

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The aqueous extract of red algae was used for bio-inspired manufacturing of cobalt oxide nanoparticles (Co3O4NPs) and for antioxidant, antibacterial, hemolytic potency, and anticancer activity. Typical, characterization techniques include UV-Vis, SEM, EDAX, TEM, FTIR, XRD, and TGA. Using an X-ray diffraction assay, the size of the Co3O4NPs crystal was determined to range from 23.2 to 11.8 nm. Based on TEM and SEM pictures, biosynthesized Co3O4NPs’ had a homogeneous spherical morphology with a 28.8 to 7.6 nm average diameter. Furthermore, Co3O4NPs biological properties were investigated, including determining the antibacterial potency using the zone of inhibition (ZOI) method and determining the minimal inhibitory concentration (MIC). The antibacterial activity of Co3O4NPs was higher than that of the ciprofloxacin standard. Alternatively, scavenging of DPPH free radical investigation was carried out to test the antioxidant capacitance of Co3O4NPs, revealing significant antioxidant ability. The biosynthesized Co3O4NPs have a dose-dependent effect on erythrocyte viability, indicating that this technique is harmless. Furthermore, bioinspired Co3O4NPs effectively against HepG2 cancer cells (IC50: 201.3 μg/ml). Co3O4NPs would be a therapeutic aid due to their antioxidant, antibacterial, and anticancer properties.

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“…The present study aims to understand the adsorption properties of Al 2 O 3 /Zeolite composite films which have been fabricated by roll coating technique on glass substrates. Compared to other adsorbents, the proposed adsorbent has high mechanical properties, high active surface area, is simple to manufacture, and has no needs to be pretreated before use [66,67].…”

Section: Introductionmentioning

confidence: 99%

Kinetics study of CO molecules adsorption on Al₂O₃/Zeolite composite films prepared by roll-coating method

Mozaffari

Elahi

et al. 2020

Surface Engineering

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CO gas adsorption has become a topic of great significance and worthy of investigation. The purpose of this study was to explore the CO adsorption of Al 2 O 3 /Zeolite composite films prepared by a roll coating method. XRD, FESEM, and EDX analyses have been used to study the structural, morphological, and elemental properties of Al 2 O 3 /Zeolite composite films. A gas analyzer was used to probe CO gas adsorption on the composite films at a constant temperature and pressure. The concentration of inlet CO gas and saturation level was 190 and 4 mg L −1 , respectively. The maximum values of adsorption efficiency and uptake capacity were measured at 97.89% and 213.9 mg g −1 . To determine the kinetic study, three models were investigated: pseudo-first-order, pseudo-second-order, and intra-particle diffusion. The pseudo-second-order model was suitable for CO adsorption by Al 2 O 3 /Zeolite adsorbent. Additionally, the rate-controlling step for Al 2 O 3 /Zeolite adsorbent was identified through the intra-particle diffusion model.

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The effect of annealing and layer numbers on the optical and electrical properties of cobalt-doped TiO₂ thin films

Cited by 10 publications

References 114 publications

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Marine Algae Extract (Grateloupia Sparsa) for the Green Synthesis of Co₃O₄NPs: Antioxidant, Antibacterial, Anticancer, and Hemolytic Activities

Kinetics study of CO molecules adsorption on Al₂O₃/Zeolite composite films prepared by roll-coating method

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The effect of annealing and layer numbers on the optical and electrical properties of cobalt-doped TiO2 thin films

Cited by 10 publications

References 114 publications

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Photocatalytic Properties of a Novel Keratin char-TiO2 Composite Films Made through the Calcination of Wool Keratin Coatings Containing TiO2 Precursors

Marine Algae Extract (Grateloupia Sparsa) for the Green Synthesis of Co3O4NPs: Antioxidant, Antibacterial, Anticancer, and Hemolytic Activities

Kinetics study of CO molecules adsorption on Al2O3/Zeolite composite films prepared by roll-coating method

Contact Info

Product

Resources

About

The effect of annealing and layer numbers on the optical and electrical properties of cobalt-doped TiO₂ thin films

Marine Algae Extract (Grateloupia Sparsa) for the Green Synthesis of Co₃O₄NPs: Antioxidant, Antibacterial, Anticancer, and Hemolytic Activities

Kinetics study of CO molecules adsorption on Al₂O₃/Zeolite composite films prepared by roll-coating method