Halloysite clay nanotubes: Innovative applications by smart systems

Fahimizadeh, Mohammad; Wong, Li Wen; Baifa, Zhang; Sadjadi, Samahe; Auckloo, Sheik Ambarine Banon; Palaniandy, Khanisya; Pasbakhsh, Pooria; Tan, Joash Ban Lee; Singh, R.K. Raman; Yuan, Peng

doi:10.1016/j.clay.2024.107319

Cited by 2 publications

(1 citation statement)

References 253 publications

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“…In general, HNTs form a hollow tubular-shaped spiral layer of aluminosilicate with the basic unit cell formula of Al 2 Si 2 O 5 (OH) 4 •nH 2 O [17]. Importantly, different deposits worldwide offer HNTs with peculiar morphologies, purity, and size distributions [20], and therefore it is considered to be a cheap and abundantly available nanomaterial for a true mass-scale industrial application [21,22]. Compared to other nanotubular particles, such as carbon nanotubes, the world supply of halloysite clay is over 50,000 tons per year [21].…”

Section: Introductionmentioning

confidence: 99%

Charge-Selective Photocatalytic Degradation of Organic Dyes Driven by Naturally Occurring Halloysite Nanotubes

Pramanik,

Calvino,

Sciortino

et al. 2024

Photochem

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This study explores the use of Halloysite NanoTubes (HNTs) as photocatalysts capable of decomposing organic dyes under exposure to visible or ultraviolet light. Through a systematic series of photocatalytic experiments, we unveil that the photodegradation of Rhodamine B, used as a model cationic dye, is significantly accelerated in the presence of HNTs. We observe that the extent of RhB photocatalytic degradation in 100 min in the presence of the HNTs is ~four times higher compared to that of bare RhB. Moreover, under optimized conditions, the as-extracted photodegradation rate of RhB (~0.0022 min−1) is comparable to that of the previously reported work on the photodegradation of RhB in the presence of tubular nanostructures. A parallel effect is observed for anionic Coumarin photodegradation, albeit less efficiently. Our analysis attributes this discrepancy to the distinct charge states of the two dyes, influencing their attachment sites on HNTs. Cationic Rhodamine B molecules preferentially attach to the outer surface of HNTs, while anionic Coumarin molecules tend to attach to the inner surface. By leveraging the unique properties of HNTs, a family of naturally occurring nanotube structures, this research offers valuable insights for optimizing photocatalytic systems in the pursuit of effective and eco-friendly solutions for environmental remediation.

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