The use of TiO2/clay heterostructures in the photocatalytic remediation of water containing organic pollutants: A review

Dlamini, Menelisi C.; Maubane‐Nkadimeng, Manoko S.; Moma, John

doi:10.1016/j.jece.2021.106546

Cited by 46 publications

(19 citation statements)

References 206 publications

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“…In addition, clay mineral surfaces are capable of physi- and/or chemisorption, which may be beneficial for enhancement of reagents concentration around the supported nanoparticles [ 7 ]. Several recent reviews reflect the widespread interest in various aspects of titania-clay composites synthesis and applications [ 1 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Composites of Montmorillonite and Titania Nanoparticles Prepared by Inverse Microemulsion Method: Physico-Chemical Characterization

et al. 2023

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TiO2/montmorillonite composites were synthesized using inverse micellar route for the preparation of titania nanoparticles (4–6 nm diameter) in 1-hexanol and for the dispersion of one of the clay components. Two series of composites were obtained: one derived from cetyltrimethylammonium organomontmorillonite (CTA-Mt), exfoliated in 1-hexanol, and the other from sodium form of montmorillonite (Na-Mt) dispersed by formation of an inverse microemulsion in 1-hexanol. The TiO2 content ranged from 16 to 64 wt.%. The composites were characterized with X-ray diffraction, scanning/transmission electron microscopy/energy dispersive X-ray spectroscopy, thermal analysis, and N2 adsorption-desorption isotherms. The Na-Mt-derived component was shown to undergo transformation to CTA-Mt, as indicated by basal spacing of 17.5 nm, due to the interaction with the CTABr surfactant in inverse microemulsion. It was also better dispersed and intermixed with TiO2 nanoparticles. As a result, the TiO2/Na-Mt series displayed superior textural properties, with specific surface area up to 256 m2g−1 and pore volume up to 0.247 cm3g−1 compared with 208 m2g−1 and 0.231 cm3g−1, respectively, for the TiO2/CTA-Mt counterpart. Members of both series were uniformly mesoporous, with the dominant pore size around 5 nm, i.e., comparable with the dimensions of titania nanoparticles. The advantage of the adopted synthesis method is discussed in the context of other preparative procedures used for manufacturing of titania-clay composites.

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Section: Introductionmentioning

confidence: 99%

Composites of Montmorillonite and Titania Nanoparticles Prepared by Inverse Microemulsion Method: Physico-Chemical Characterization

et al. 2023

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“…In general, clays are considered as the most interesting materials because of their low cost and their abundance over all continents [2,3]. Their small size in natural conditions (less than 2 μm) means that these minerals develop large specific surfaces [4]. Bentonite, one member of the clays' family, designates a mineral powder that consists essentially of montmorillonite [5].…”

Section: Introductionmentioning

confidence: 99%

Geotechnical and thermal analysis and complex impedance spectroscopy characterization of pure Moroccan bentonite material for civil engineering applications

Essaleh

Bouferra

Kadiri³

et al. 2023

Eureka: PE

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Combined modulus and impedance spectra are employed in the present work to explore electrical inhomogeneity and carriers’ behaviors in a pure bentonite Moroccan clay based on equivalent circuit. It has been clearly observed that the electrical properties change due to the increase of temperature from 300 °C to 700 °C. The frequency-dependent imaginary modulus M" and imaginary impedance Z" curves has only one peak at each temperature indicating the predominance of the contribution of grains to the total electrical conduction in bentonite. The positions of these peaks move to higher frequencies when the temperature increases in relation with the distribution of relaxation time. Moreover, the activation energy for the conduction process in bentonite is determined from the slope of ln(ρdc) versus of 1/T in the order of 700 meV in good agreement with that obtained from the proposed equivalent circuit. On the other hand, let’s present a geotechnical study that show that our material is a swelling clay, very plastic and could be used as a binder. The external stress dependence of the bulk density, Young’s module and maximum stress are analysed. The thermal conductivity determined following the device of Lee's disks where two copper disks of thickness of 15 mm and diameter of 30 mm were used

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“…The UV/H 2 O 2 process involves the formation of hydroxyl radicals by the photolysis of H 2 O 2 , requiring the use of light with a wavelength shorter than 300 nm [20,21]. Heterogeneous photocatalysis has been widely explored with TiO 2 , or other semiconductor materials, which, after irradiation in the UVA range, are capable of producing hydroxyl radicals from water [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Comparing the efficiency of solar water treatment: Photovoltaic-LED vs compound parabolic collector photoreactors

Martín-Sómer¹,

Molina-Ramírez²,

Perez-Araujo³

et al. 2023

Journal of Environmental Chemical Engineering

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The use of TiO2/clay heterostructures in the photocatalytic remediation of water containing organic pollutants: A review

Cited by 46 publications

References 206 publications

Composites of Montmorillonite and Titania Nanoparticles Prepared by Inverse Microemulsion Method: Physico-Chemical Characterization

Composites of Montmorillonite and Titania Nanoparticles Prepared by Inverse Microemulsion Method: Physico-Chemical Characterization

Geotechnical and thermal analysis and complex impedance spectroscopy characterization of pure Moroccan bentonite material for civil engineering applications

Comparing the efficiency of solar water treatment: Photovoltaic-LED vs compound parabolic collector photoreactors

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