Synthesis and characterization of clay-based adsorbents modified with alginate, surfactants, and nanoparticles for methylene blue removal

Mundkur, Naethan; Khan, Amir Sada; Khamis, Mustafa; Ibrahim, Taleb H.; Nancarrow, Paul

doi:10.1016/j.enmm.2022.100644

Cited by 7 publications

(6 citation statements)

References 36 publications

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“…16 The addition of NiO NPs to the solid kaolin support facilitates retrieval of NiO NPs, promotes the adsorption of contaminants, and accelerates the catalytic degradation processes as the clay maintains NPs on its outer surfaces and in its internal voids. 17 Additionally, the effects of using H 2 O 2 as an oxidizing agent during AOPs also have limitations. 18 Therefore, it is necessary to have an optional AOP that is as good as a method using H 2 O 2 , but with less operational expenditure.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most cost-effective ways to develop nanoparticles on clay compounds is to use them as support materials. This is because clay compounds are less expensive than other support materials like carbon nanotubes and graphene, which are more expensive than inexpensive clay …”

Section: Introductionmentioning

confidence: 99%

“…It is especially necessary to act as a support for a nanocatalyst because of its exceptional features, including excellent adaptability, thermal and mechanical stability, and its layered nature makes it simple to alter and create composites and hybrids . The addition of NiO NPs to the solid kaolin support facilitates retrieval of NiO NPs, promotes the adsorption of contaminants, and accelerates the catalytic degradation processes as the clay maintains NPs on its outer surfaces and in its internal voids …”

Section: Introductionmentioning

confidence: 99%

“…This is because clay compounds are less expensive than other support materials like carbon nanotubes and graphene, which are more expensive than inexpensive clay. 15 …”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Kaolin-Supported Nickel Oxide Composites for the Catalytic Oxidative Degradation of Methylene Blue Dye

Mohammed,

Atlabachew,

Aragaw

et al. 2024

ACS Omega

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Organic dye contamination of water is a contributing factor to environmental pollution and has a negative impact on aquatic ecology. In this study, unsupported NiO and kaolin-supported NiO composites were synthesized by a one-step wet impregnation–precipitation method through the precipitation of nickel hydroxide onto locally accessible, inexpensive, and easily treated kaolin surfaces by using sodium hydroxide as a precipitating agent. The product was calcined at 500 °C and used for the catalytic oxidative degradation of methylene blue (MB) dye in an aqueous solution. The morphology, structure, and interactions of the synthesized materials were explored by SEM, XRD, and FT-IR spectroscopy. The characterization results revealed the fabrication and the growth of NiO on the kaolin surface. To determine the catalytic oxidative degradation performance of the catalyst, many experiments have been performed using the MB dye as a model dye. The catalytic degradation tests confirmed the importance of NiO and the high catalytic activity of the synthesized NiO/kaolin composite toward MB dye degradation. The oxidative degradation results showed that the optimized precursor amount on the kaolin surface could efficiently enhance the removal of MB dye. The kinetic investigation of the catalytic degradation of MB dye fitted the pseudo-first-order kinetic model. High removal efficiency was observed after eight reuse cycles, proving the exceptional stability and reusability of the composite. The catalytic process also proceeded with a low activation energy of 30.5 kJ/mol. In conclusion, the kaolin-supported NiO composite was established to be a favorable catalyst to degrade a model dye (MB) from an aqueous solution in the presence of inexpensive and easily available NaOCl with a catalytic efficiency of the material higher than 99% of the 20.3 mg catalyst within 6 min with an apparent rate constant, k app, higher than 0.44625 min–1, which is far better than that of the unsupported catalyst with a k app of 0.0926 min–1 at 10 mg dose in 20 min.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This is because clay compounds are less expensive than other support materials like carbon nanotubes and graphene, which are more expensive than inexpensive clay. 15 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Kaolin-Supported Nickel Oxide Composites for the Catalytic Oxidative Degradation of Methylene Blue Dye

Mohammed,

Atlabachew,

Aragaw

et al. 2024

ACS Omega

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“…One of the most efficient agglomeration solutions with the least cost is synthesizing nanoparticles based on clay compounds as the support material. The nanoparticles are maintained within the interlamellar spaces of clay and on its external surfaces. − …”

Section: Introductionmentioning

confidence: 99%

Kaolin-Supported Silver Nanoparticles as an Effective Catalyst for the Removal of Methylene Blue Dye from Aqueous Solutions

et al. 2022

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Water contamination by organic dyes has become a reason for severe environmental pollution and has been threatening the aquatic ecosystem. In this study, kaolin-supported silver nanoparticle (Ag-NP) composites were synthesized by a facile two-step adsorption−reduction method through the reduction of silver ions adsorbed onto locally available, inexpensive, and easily pretreated kaolin surfaces by using sodium borohydride (NaBH 4 ) for the catalytic degradation of methylene blue (MB) dye in aqueous solution. The morphology, structure, surface area, and interaction of the synthesized materials were investigated by scanning electron microscopy, X-ray diffraction, Brunauer− Emmett−Teller, and Fourier transform infrared spectroscopy, respectively. Characterization results showed the successful growth of Ag-NPs on the kaolin surface. To understand the catalytic degradation performance of the catalyst, batch experiments were carried out using MB dye as a model dye. The catalytic reduction tests confirmed the importance of Ag-NPs and the high catalytic activities of the synthesized Ag-NPs/kaolin composite toward MB dye reduction. The degradation results indicated that the increased Ag-NP content on the kaolin surface through repeating cycles could effectively enhance the removal of MB dye from an aqueous solution. The kinetic analysis of the MB dye degradation of the catalyst has fitted the pseudo-first-order kinetic model. More than 97% removal efficiency was still present after five reuse cycles, demonstrating exceptional stability and reusability of the composite. In conclusion, the Ag-NPs supported kaolin (Ag-NPs/kaolin) composite was found to be a promising catalyst for the excellent catalytic activity to reduce a model dye MB from the aqueous solution in the presence of NaBH 4 with catalytic efficiency higher than 97% and a reduction rate constant, k red , higher than 0.86 min −1 .

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Surfactant-Modified Clay Composites: Water Treatment Applications

Perera,

Amarasena,

Bandara

et al. 2023

Advances in Material Research and Technology

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Synthesis and characterization of clay-based adsorbents modified with alginate, surfactants, and nanoparticles for methylene blue removal

Cited by 7 publications

References 36 publications

Synthesis of Kaolin-Supported Nickel Oxide Composites for the Catalytic Oxidative Degradation of Methylene Blue Dye

Synthesis of Kaolin-Supported Nickel Oxide Composites for the Catalytic Oxidative Degradation of Methylene Blue Dye

Kaolin-Supported Silver Nanoparticles as an Effective Catalyst for the Removal of Methylene Blue Dye from Aqueous Solutions

Surfactant-Modified Clay Composites: Water Treatment Applications

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