Study of heteroaggregation and properties of sol-gel AlOOH–Fe3O4 composites

Mikhaylov, Vasily I.; Martakov, Ilia S.; Gerasimov, Evgeny Yu.; Sitnikov, Petr А.

doi:10.1016/j.heliyon.2020.e05825

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…Furthermore, the stretching of the Fe–O band is observed at 789 cm −1 The wavebands at 3740 and 2966 cm −1 could also indicate the stretching of the –OH group. The AlOOH band is observed to have stretched at 630 cm −1 [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Congo Red from Aqueous Solution Using Fe/Al Di-Metal Nanostructured Composite Synthesised from Fe(III) and Al(III) Recovered from Real Acid Mine Drainage

Muedi

Masindi

Maree³

et al. 2022

Nanomaterials

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This study presents the first known exploration of Congo red dye (CR) adsorption by a polycationic Fe/Al Di-metal nanostructured composite (PDFe/Al) synthesised using Fe(III) and Al(III) recovered from authentic acid mine drainage (AMD). The PDFe/Al successfully removed CR from the aqueous solution. The mineralogical, microstructural, and chemical properties of the synthesised PDFe/Al adsorbent (before and after adsorption) were studied using state-of-the-art analytical instruments. The optimum conditions were observed to be 100 mg·L−1 CR, 1 g of the PDFe/Al in 500 mL adsorbate solution, 20 min of shaking, pH = 3–8, and a temperature of 35 °C. At optimised conditions, the PDFe/Al showed ≥99% removal efficacy for CR dye and an exceptionally high Langmuir adsorption capacity of 411 mg·g−1. Furthermore, a diffusion-limited adsorption mechanism was observed, with two distinct surfaces involved in the adsorption of CR from an aqueous solution. It was determined that the adsorption of CR induced internal strain and deformation within the matrices and interlayers of the PDFe/Al which resulted in a marked increase in the adsorbent pore surface area and pore volume. The remarkably high adsorption capacity could be attributed to the high surface area. A regeneration study showed that the adsorbent could be reused more than four times for the adsorption of CR. The findings from this study demonstrated the feasibility of recovering valuable minerals from toxic and hazardous AMD and demonstrated their potential for the treatment of industrial wastewaters.

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Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Congo Red from Aqueous Solution Using Fe/Al Di-Metal Nanostructured Composite Synthesised from Fe(III) and Al(III) Recovered from Real Acid Mine Drainage

Muedi

Masindi

Maree³

et al. 2022

Nanomaterials

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“…Partially acetylated CNC particles were prepared one-pot from microcrystalline cellulose by the previously described method . Pseudoboehmite sol–gel synthesis was performed according to our previously published paper …”

Section: Methodsmentioning

confidence: 99%

“…31 Pseudoboehmite sol−gel synthesis was performed according to our previously published paper. 32 2.2.2. Synthesis of AlOOH−CNC Hybrid Particles.…”

Section: Sample Preparation 221 Nanoparticle Synthesismentioning

confidence: 99%

Biocompatible Nanoparticle Heteroaggregates as Stabilizers of Pickering Emulsions for Vitamin D3 Efficient Delivery

Martakov

Vaseneva

Торлопов

et al. 2022

ACS Appl. Bio Mater.

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Vitamin D3 deficiency is a major public health problem worldwide, and standard cholecalciferol formulations provide poor absorbability of the vitamin. Several biphasic formulas have been proposed to overcome the disadvantages in which Pickering emulsions stand out in particular. This paper describes olive oil-in-water Pickering emulsions stabilized by pseudoboehmite (AlOOH), cellulose nanocrystals (CNC), and their heterocoagulates. Colloidal properties were assessed by laser Doppler microelectrophoresis, potentiometric titration, and rheology. It was shown that the heterocoagulation of CNC and AlOOH led to a drastic change in surface properties (ζ-potential, pK a, and number of active centers), which promoted the formation of more stable emulsions with the smallest size of droplets and the highest viscosity among the studied samples. Simulated digestion studies showed the targeted release in the small intestine medium where cholecalciferol should be delivered. High-performance liquid chromatography showed the efficient encapsulation of cholecalciferol in emulsions (86% of initial concentration). Oral administration to laboratory mice of initial nanoparticles and emulsions stabilized by them showed nontoxicity for all of the components, and they were estimated to be class V materials. The proposed emulsions have great potential as targeted delivery systems of lipophilic drugs.

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Synthesis Method of Silica-Aluminum Based Aerogel Composites and Their Application in High Temperature Resistance

高¹

2021

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Study of heteroaggregation and properties of sol-gel AlOOH–Fe3O4 composites

Cited by 3 publications

References 38 publications

Effective Adsorption of Congo Red from Aqueous Solution Using Fe/Al Di-Metal Nanostructured Composite Synthesised from Fe(III) and Al(III) Recovered from Real Acid Mine Drainage

Effective Adsorption of Congo Red from Aqueous Solution Using Fe/Al Di-Metal Nanostructured Composite Synthesised from Fe(III) and Al(III) Recovered from Real Acid Mine Drainage

Biocompatible Nanoparticle Heteroaggregates as Stabilizers of Pickering Emulsions for Vitamin D3 Efficient Delivery

Synthesis Method of Silica-Aluminum Based Aerogel Composites and Their Application in High Temperature Resistance

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