Natural Clay Modified with ZnO/TiO2 to Enhance Pollutant Removal from Water

Mahy, Julien G.; Mbognou, Marlène Huguette Tsaffo; Leonard, C E; Fagel, Nathalie; Woumfo, Emmanuel Djoufac; Lambert, Stéphanie D.

doi:10.3390/catal12020148

Cited by 20 publications

(5 citation statements)

References 27 publications

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“…Figure 3 shows the material's morphology; the TiO2 is distributed uniformly and in scales [38,39] and the EDS results. The granules can be attributed to the formation of TiO2 nanoparticles, characteristic of the anatase phase [40,41]. 1GGT presented a more excellent distribution of TiO2 particles and a larger crystalline size, a fact that is related to the greater surface area according to the BET and XRD results.…”

Section: Electron Microscopic Studiesmentioning

confidence: 89%

Biopolymer Gellan-Gum-Based TiO2: A Green Alternative Photocatalyst Approach for Removal of Pollutants

Xisto,

Damacena,

de Araújo

et al. 2024

Water

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Titanium dioxide TiO2/gellan gum (GG) in different compositions (1, 3, and 5% GG) was investigated to degrade methylene blue (MB) under UV light. XRD, SEM, and EDS confirmed the anatase phase. The textural properties demonstrated the formation of mesopores. The band gaps were 3.2 eV, 3.0 eV, and 2.9 eV. A photodegradation of MB of 95% was observed using the lowest gum concentration. It was attributed to the photogenerated radicals and the specific surface area. The FTIR spectra showed the photostability of the catalyst after successive cycles. The toxicity tests demonstrated no toxicity after dye degradation. Therefore, TiO2/GG is promising for the treatment of water.

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Section: Electron Microscopic Studiesmentioning

confidence: 89%

Biopolymer Gellan-Gum-Based TiO2: A Green Alternative Photocatalyst Approach for Removal of Pollutants

Xisto,

Damacena,

de Araújo

et al. 2024

Water

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“…The as-prepared composite material was used for the degradation of p-nitrophenol and fluorescein. The photocatalytic efficiency was studied under UV light irradiation, and the material exhibited excellent activity of about 90% removal over a time of 8 h and the efficacy was profound in the case of p-nitrophenol [91].…”

Section: Tio 2 /Montmorillonite or Smectitementioning

confidence: 99%

Recent Clay-Based Photocatalysts for Wastewater Treatment

et al. 2023

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Photocatalysis is a remarkable methodology that is popular and applied in different interdisciplinary research areas such as the degradation of hazardous organic contaminants in wastewater. In recent years, clay-based photocatalyst composites have attracted significant attention in the field of photocatalysis owing to their abundance, excellent light response ability, and stability. This review describes the combination of clay with focusing photocatalysts such as TiO2, g-C3N4, and Bi-based compounds for degrading organic pollutants in wastewater. Clay-based composites have more active surface sites, resulting in inhibited photocatalyst particle agglomeration. Moreover, clay enhances the creation of active radicals for organic pollutant degradation by separating photogenerated electrons and holes. Thus, the functions of clay in clay-based photocatalysts are not only to act as a template to inhibit the agglomeration of the main photocatalysts but also to suppress charge recombination, which may lengthen the electron–hole pair’s lifespan and boost degrading activity. Moreover, several types of clay-based photocatalysts, such as the clay type and main photocatalyst, were compared to understand the function of clay and the interaction of clay with the main photocatalyst. Thus, this study summarizes the recent clay-based photocatalysts for wastewater remediation and concludes that clay-based photocatalysts have considerable potential for low-cost, solar-powered environmental treatment.

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“…In the contribution of Mahy et al [10], raw clays, from Cameroon, were modified with semiconductors (TiO 2 and ZnO) to improve their depollution properties with the addition of photocatalytic properties. Cu 2+ ions were also added to the clay via an ionic exchange to increase the specific surface area.…”

Section: Composite Materials As Photocatalystsmentioning

confidence: 99%