Nanoreactors based on hydrophobized tubular aluminosilicates decorated with ruthenium: Highly active and stable catalysts for aromatics hydrogenation

Glotov, Aleksandr; Новиков, А. А.; Stavitskaya, Anna; Nedolivko, V. V.; Копицын, Д. С.; Kuchierskaya, Alexandra A.; Иванов, Е. В.; Stytsenko, V. D.; Винокуров, В. А.; Lvov, Yuri

doi:10.1016/j.cattod.2020.10.001

Cited by 31 publications

(16 citation statements)

References 65 publications

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“…A natural halloysite (Hal) nanotube with an asymmetric multilayer wall is naturally rolled from kaolinite (Kaol) nanosheets. − Because of its unique tubular nanostructure, Hal has attracted tremendous interest for many fields in these years such as controlled release of functional compounds, catalysis supports, − adsorbent, filler in polymers, and nanotemplate/nanoreactor. − A halloysite nanotube (HNT) possesses an octahedral (Al–OH) inner lumen with hydroxyl groups and a tetrahedral (Si–O) outer surface (Figure a,b). The different composition and structure of the inner and outer surfaces of Hal result in its asymmetric physical and chemical properties, which facilitate to fulfill the spatially controlled chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Natural Halloysite Nanotube as a Spatially Confined Nanoreactor for Improving Photocatalytic Performance

Jiang

Jing²,

Liu

et al. 2021

J. Phys. Chem. C

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Synthetic confined systems with inner cavity have attracted extensive research interest in many fields, but how to engineer an effective and inexpensive confined microsystem remains a great challenge owing to normally the same physicochemical properties of cavity’s inner and outer surfaces and its sophisticated synthetic strategies. Herein, we demonstrate that a natural and low-cost halloysite nanotube (HNT) with an asymmetric layered structure is a spatially confined nanoreactor for enhancing the photochemical reaction. The higher Fe doping content of the Al–OH inner surface results in the obvious better photochemical activity and stronger adsorption ability of the inner surface of HNT compared with the outer surface. The unique asymmetric inner and outer properties induce the obvious spatial confinement effects of the lumen of HNT for improving the photocatalytic reaction. Compared with Kaolinte nanosheets (Kaol NSs), the normalized photocatalytic reaction rates of HNT were 1.3, 1.8, and 5.1 times that of Kaol NSs for the photodegradation of rhodamine, malachite green, and ciprofloxacin, respectively. The present work not only provides some new insights into the structure of HNT but also demonstrates a low-cost and eco-friendly spatially confined nanoreactor for biomedical and catalytic applications.

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Section: Introductionmentioning

confidence: 99%

Natural Halloysite Nanotube as a Spatially Confined Nanoreactor for Improving Photocatalytic Performance

Jiang

Jing²,

Liu

et al. 2021

J. Phys. Chem. C

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“…Its activity was further decreased probably due to partial metal leaching (Ru-content decreased from 2.7 to 2.4 wt% after 1 cycle). 38 The activities in hydrogenation of aromatics over Ru-loaded inside the clay nanotubes and grafted outside were close, but the stability of Ru-particles located inside the nanoclay was higher. Such inner-core nanoreactors were 10–20% more active and 10-times more stable than the Ru-halloysite composite without a protective hydrophobic shell (in water–organic mixtures, the catalysts supported on non-modified halloysite were deactivated in 30 minutes).…”

Section: Selective Metal Modification Inside and Outside The Tubesmentioning

confidence: 95%

Architectural design of core–shell nanotube systems based on aluminosilicate clay

et al. 2022

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“…A step-forward to the use of HNTs as support for Ru NPs was made some years later by the same authors, who proposed the development of catalytic core-shell nanoreactors based on hydrophobized HNTs to stabilize the metal NPs [97]. To achieve this goal, they modified the external HNTs surface with three different alkyltriethoxysilanes, namely the ones with the tail length of C 3 , C 8 and C 18 .…”

Section: Hnts As Support For Metal Catalystmentioning

confidence: 99%

Halloysite Nanotubes: Smart Nanomaterials in Catalysis

2022

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The use of clay minerals as catalyst is renowned since ancient times. Among the different clays used for catalytic purposes, halloysite nanotubes (HNTs) represent valuable resources for industrial applications. This special tubular clay possesses high stability and biocompatibility, resistance against organic solvents, and most importantly be available in large amounts at a low cost. Therefore, HNTs can be efficiently used as catalysts themselves or supports for metal nanoparticles in several catalytic processes. This review reports a comprehensive overview of the relevant advances in the use of halloysite in catalysis, focusing the attention on the last five years.

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Nanoreactors based on hydrophobized tubular aluminosilicates decorated with ruthenium: Highly active and stable catalysts for aromatics hydrogenation

Cited by 31 publications

References 65 publications

Natural Halloysite Nanotube as a Spatially Confined Nanoreactor for Improving Photocatalytic Performance

Natural Halloysite Nanotube as a Spatially Confined Nanoreactor for Improving Photocatalytic Performance

Architectural design of core–shell nanotube systems based on aluminosilicate clay

Halloysite Nanotubes: Smart Nanomaterials in Catalysis

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