Bentonite-titanium dioxide functional nanocomposites suitable for wastewater treatment: an integrated photocatalyst-adsorbent system

Smitha, Venu Sreekala; Vayalveettil, Athira; Kochu, Jayasooryan Kazhuthuttil; Ramakrishnan, Resmi Thoppil; Pillai, Harikumar Puthenveedu Sadasivan

doi:10.1039/d1nj05472d

Cited by 9 publications

(1 citation statement)

References 54 publications

(51 reference statements)

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“…Moreover, the effect of pH in the TiO 2 /clay composites was investigated for organiccontaining wastewater. It can be found that the TiO 2 /clay composites such as sepiolite-TiO 2 composite [108], TiO 2 -montmorillonite composites [109], and TiO 2 -bentonite composites [110] showed the highest photocatalytic activity for organic decomposition around neutral to basic pH conditions; however, the acid condition was not suitable for the photocatalytic organic decomposition due to the high stability of the clay composites. Normally, a low pH has a negative impact on the stability of clay particles because acid destroys the clay particles at their edges, causing the release of Al ions.…”

Section: Tio 2 /Sepiolitementioning

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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Section: Tio 2 /Sepiolitementioning

confidence: 99%