Synthesis of hematite/alginate beads nanocomposite and its application in organic dye removal

Dubey, Monika; Wadhwa, Shikha; Kumar, Ranjit

doi:10.1016/j.matpr.2020.01.302

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…It is recognized as a catalyst of Fenton and photo-Fenton reactions in which hydroxyl radicals are produced by light, iron, and hydrogen peroxide. Moreover, hematite nanoparticles are among the most promising metal oxides with the capability of organic dye adsorption and inorganic impurity removal in water remediation application . Hematite peanut-shaped micromotors displayed self-propulsion under blue light and self-organized into ribbons with a positive phototaxis in H 2 O 2 solution .…”

Section: Micromotors For Microplastics Decompositionmentioning

confidence: 99%

“…Moreover, hematite nanoparticles are among the most promising metal oxides with the capability of organic dye adsorption and inorganic impurity removal in water remediation application. 79 Hematite peanut-shaped micromotors displayed self-propulsion under blue light and self-organized into ribbons with a positive phototaxis in H 2 O 2 solution. 80 Because of their biocompatibility and the possibility of their actuation by an external magnetic field, the micromotors were studied for issues regarding cell manipulation and patterning.…”

Section: Micromotors For Microplastics Decompositionmentioning

confidence: 99%

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Micromachines for Microplastics Treatment

Hermanová

Pumera

2022

ACS Nanosci. Au

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The increasing accumulation of persistent nondegradable microplastics in the marine environment represents a global environmental problem. Among emerging approaches to tackle microplastics are micro-and nanomotors, tiny devices capable of autonomous propulsion powered by chemical fuels or light. These devices are capable of on-the-fly recognition, capture, and decomposition of pollutants. In the past, various micromotors were designed to efficiently remove and degrade soluble organic pollutants. Current effort is given to the rational design and surface functionalization to achieve micromotors capable of capturing, transporting, and releasing microplastics of different shapes and chemical structures. The catalytic micromotors performing photocatalysis and photo-Fenton chemistry hold great promise for the degradation of most common plastics. In this review, we highlight recent progress in the field of micromotors for microplastics treatment. These tiny self-propelled machines are expected to stimulate a quantum leap in environmental remediation.

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Section: Micromotors For Microplastics Decompositionmentioning

confidence: 99%

Section: Micromotors For Microplastics Decompositionmentioning

confidence: 99%

Micromachines for Microplastics Treatment

Hermanová

Pumera

2022

ACS Nanosci. Au

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“…A case in point of a material whose morphological and structural features can be changed depending on the treatment is hematite (α-Fe 2 O 3 ) and akaganite (β-FeOOH). Both phases, which are produced by the F-O-H system, have a wide range of potential applications as well as outstanding stability and minimal toxicity 12,13 . In a recent study, Kushwaha and Chauhan 14 synthesized α-Fe 2 O 3 via the co-precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Fast and Green Hematite (α-Fe2O3) and Akaganeite (β-FeOOH) Synthesis Using a Microwave-Assisted Hydrothermal Process with Single Precursor and No Stabilizing Agent

Diniz,

Cavalcante,

Souza

et al. 2023

Mat. Res.

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In this work, iron chloride (FeCl 3 .6H 2 O), a single reagent, was used to create the phases of hematite (α-Fe 2 O 3 ) and akaganeite (β-FeOOH) without the need of organic solvents using the microwave-assisted hydrothermal technique (HM). X-ray diffraction demonstrated the efficacy of the HM technique in the generation of crystalline phases of α-Fe 2 O 3 at 180 o C and β-FeOOH at 120 o C. The development of pseudo-cunic and stick-like particles was a result of changes in experimental variables, which also had a substantial impact on the materials structural characteristics. The nitrogen (N 2 ) adsorption/desorption isotherms of the samples containing akaganeite and hematite phase resembled those of mesoporous materials. Hematite has a surface area of 25.44 m 2 g -1 , while akaganeite has a surface area of 110.60 m 2 g -1 , according to the calculation. Thermodifferential and thermogravimetric techniques were used to assess thermal degradation. The use of microwave hydrothermal synthesis was promoted as being quick, easy, affordable, and safe for the environment.

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