Preparation and characterisation of high performing magnesite-halloysite nanocomposite and its application in the removal of methylene blue dye

Ngulube, Tholiso; Gumbo, Jabulani R.; Masindi, Vhahangwele; Maity, Arjun

doi:10.1016/j.molstruc.2019.02.043

Cited by 29 publications

(7 citation statements)

References 53 publications

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“…Aliouche et al found that color removal caused by azo dyes followed an increasing order: UV < acetone/UV < S 2 O 8 2− /heat < S 2 O 8 2− /H 2 O 2 /UV < S 2 O 8 2− /UV < H 2 O 2 /UV [ 9 ]. Various nanomaterials used as the absorbents contain cobalt-zinc ferrite nanoadsorbents [ 19 ], silica nano-composite [ 16 , 20 , 21 , 22 ], nano zero-valent iron [ 23 ], Fe 3 O 4 nano-composite [ 24 , 25 , 26 , 27 ], carbon nanomaterials [ 28 , 29 , 30 , 31 , 32 , 33 ] and clay [ 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

“…Aliouche et al found that color removal caused by azo dyes followed an increasing order: UV < acetone/UV < [9]. Various nanomaterials used as the absorbents contain cobalt-zinc ferrite nanoadsorbents [19], silica nano-composite [16,[20][21][22], nano zero-valent iron [23], Fe 3 O 4 nano-composite [24][25][26][27], carbon nanomaterials [28][29][30][31][32][33] and clay [34,35]. Due to it being naturally occurring and easily available, bentonite (Bent) has attracted significant interest as an adsorbent.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I

Guo

Umar

et al. 2020

Nanomaterials

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Poly(2-(dimethylamino)ethyl methacrylate)-grafted bentonite, marked as Bent-PDMAEMA, was designed and prepared by a surface-initiated atom transfer radical polymerization method for the first time in this study. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA) were applied to characterize the structure of Bent-PDMAEMA, which resulted in the successful synthesis of Bent-PDMAEMA. As a cationic adsorbent, the designed Bent-PDMAEMA was used to remove dye Orange I from wastewater. The adsorption property of Bent-PDMAEMA for Orange I dye was investigated under different experimental conditions, such as solution pH, initial dye concentration, contact time and temperature. Under the optimum conditions, the adsorption amount of Bent-PDMAEMA for Orange I dye could reach 700 mg·g−1, indicating the potential application of Bent-PDMAEMA for anionic dyes in the treatment of wastewater. Moreover, the experimental data fitted well with the Langmuir model. The adsorption process obeyed pseudo-second-order kinetic process mechanism.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I

Guo

Umar

et al. 2020

Nanomaterials

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“…As 10 mg of hybrid CNTs in 20 mL were dispersed, the results observed that zeta potential values varied from 0.111 to −23 (mV) in the pH range of 3-11, as shown in Table 3. The surface charge of hybrid CNTs is positive in acidic medium (pH < pHpzc) [50]. There was also a noticeable reduction in surface charge, which was more negative when pH > pHpzc, causing easy interaction with the positive ions and hybrid CNTs' surface, and thus, finally affecting the high adsorption process caused by electrostatic interaction [51].…”

Section: Zeta Potentialmentioning

confidence: 99%

Synthesis, Characterization, and Analysis of Hybrid Carbon Nanotubes by Chemical Vapor Deposition: Application for Aluminum Removal

et al. 2020

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Hybrid carbon nanotubes (CNTs) are grown on biomass powder-activated carbon (bio-PAC) by loading iron nanoparticles (Fe) as catalyst templates using chemical vapor deposition (CVD) and using acetylene as carbon source, under specific conditions as reaction temperature, time, and gas ratio that are 550 °C, 47 min, and 1, respectively. Specifications of hybrid CNTs were analyzed and characterized using field emission scanning electron microscope (FESEM) with energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopic (TEM), Fourier-transform infrared (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), surface area Brunauer–Emmett–Teller (BET), and zeta potential. The results revealed the high quality and unique morphologies of hybrid CNTs. Furthermore, removal and capacity of Al3+ were optimized by response surface methodology (RSM). However, the results revealed that the pseudo-second-order model well represented adsorption kinetic data, while the isotherm data were effectively fitted using a Freundlich model. The maximum adsorption capacity was 347.88 mg/g. It could be concluded that synthesized hybrid CNTs are a new cost-effective and promising adsorbent for removing Al3+ ion from wastewater.

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“…One of these clays is halloysite nanoclay (Hal) [21][22][23] that is dioctahedral 1:1 clay mineral with tubular morphology [24][25][26][27][28][29][30][31]. The outstanding performance of this clay [32,33] as a support has induced many studies and to date [34,35], various catalytic species have been stabilized on Hal. Noteworthy, not only Hal exterior surface can be decorated with catalytic species, but also Hal lumen can be targeted for embedding the catalytic species.…”

Section: Introductionmentioning

confidence: 99%

Halloysite Nanoclay with High Content of Sulfonic Acid-Based Ionic Liquid: A Novel Catalyst for the Synthesis of Tetrahydrobenzo[b]pyrans

et al. 2021

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One of the main drawbacks of supported ionic liquids is their low loading and consequently, low activity of the resultant catalysts. To furnish a solution to this issue, a novel heterocyclic ligand with multi imine sites was introduced on the surface of amino-functionalized halloysite support via successive reactions with 2,4,6-trichloro-1,3,5-triazine and 2-aminopyrimidine. Subsequently, the imine sites were transformed to sulfonic acid-based ionic liquids via reaction with 1,4-butanesultone. Using this strategy, high loading of ionic liquid was loaded on halloysite nanoclay. The supported ionic liquid was then characterized with XRD, SEM, TEM, EDS, FTIR, BET, TGA and elemental mapping analysis and utilized as a metal-free Brønsted acid catalyst for promoting one-pot reaction of aldehydes, dimedone and malononitrile to furnish tetrahydrobenzo[b]pyrans. The catalytic tests confirmed high performance of the catalyst. Moreover, the catalyst was stable upon recycling.

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Preparation and characterisation of high performing magnesite-halloysite nanocomposite and its application in the removal of methylene blue dye

Cited by 29 publications

References 53 publications

Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I

Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I

Synthesis, Characterization, and Analysis of Hybrid Carbon Nanotubes by Chemical Vapor Deposition: Application for Aluminum Removal

Halloysite Nanoclay with High Content of Sulfonic Acid-Based Ionic Liquid: A Novel Catalyst for the Synthesis of Tetrahydrobenzo[b]pyrans

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