Designed synthesis of hematite-based nanosorbents for dye removal

Wu, Junshu; Li, Hongyi; Du, Yukou; Huang, Kelin; Liu, Baixiong

doi:10.1039/c3ta11520h

Cited by 73 publications

(34 citation statements)

References 46 publications

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“…The development of methods of dye removal from solutions is a subject of intense experimental works. Many investigations were focused on the development of efficient adsorbents [31][32][33]. Efforts to increase dye removal efficiency have resulted in the development of adsorbent materials with magnetic properties [34].…”

Section: Introductionmentioning

confidence: 99%

Influence of chemical structure of dyes on capacitive dye removal from solutions

Shi

Zhitomirsky

2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Influence of chemical structure of dyes on capacitive dye removal from solutions

Shi

Zhitomirsky

2015

Electrochimica Acta

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“…Effective use of electron-hole pairs is a key factor in rapid degradation of organic pollutants but the determinant step in the process is recombination of electrons and holes causing the weakening of the photocatalytic activity of many common semiconducting metal oxides [2][3][4]. Thus, in recent years, various approaches have been proposed to strengthen the photocatalytic activity of semiconductors, including the increase of external surface area, surface/morphology modification or creating structural defects [1,2,[6][7][8]. Among them, modifying the surface of metal oxide semiconductors using noble metals such as platinum and palladium is one of the most successful methods to boost the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic upgrading α-Fe₂O₃ nanoparticles by incorporating MoS₂/rGO nanosheets

Lejbini

Sangpour

Tajabadi

et al. 2020

Mater. Res. Express

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α-Fe 2 O 3 /MoS 2 /rGO nanocomposites was prepared by a two-step hydrothermal method and characterized by XRD, FESEM, EDS, FTIR, and UV-vis absorption spectroscopy. The results confirmed the formation of α-Fe 2 O 3 /MoS 2 -rGO (10 wt%) nanocomposites were composed of hematite nanoparticles with particle size of 30 nm and MoS 2 /rGO composite nanosheets with maximum sheet thickness of∼10 nm. Upon addition of MoS 2 -rGO (8.0 wt%) nanosheets, the band gap of α-Fe 2 O 3 nanoparticles decreased from 2.3 to 1.7 eV that was accompanied by light absorption enhancement. Owing to synergetic effect between rGO and MoS 2 nanosheets leading to suppression of charge carrier recombination, prolongation of charge carrier lifetime, improvement of the interfacial charge transfer and increase in the number of active sites in α-Fe 2 O 3 nanoparticles, assynthesized α-Fe 2 O 3 /MoS 2 -rGO (10 wt%) nanocomposites nanocomposite showed highly enhanced photocatalytic performance for Rh B degradation under light irradiation so that complete degradation of Rh B organic dye was achieved within 30 min.

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“…Various chemical and physical treatment techniques and processes have been used to remove the dye pollutants from contaminated water. The adsorption [2][3][4] and catalytic oxidation processes, especially heterogeneous photocatalysis [5,6], are the most successful methods for removal of dye pollutants from water. The development of new materials with higher pollutant removal capacity and reuse ability has contributed significantly to the treatment of contaminated effluents.…”

Section: Introductionmentioning

confidence: 99%

Highly monodispersed hematite cubes for removal of ionic dyes

Sajjadi

Goharshadi

2017

Journal of Environmental Chemical Engineering

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This study demonstrates fast and efficient removal of ionic dyes using highly monodispersed single crystalline hematite. Highly monodispersed single crystalline hematite with similar cube-shape but different sizes were successfully fabricated via a series of facile template-free microwave (MW)/ultrasound (US) assisted hydrothermal (HT) techniques. The products were characterized by seven techniques including powder X-ray diffraction , fourier transform infrared and ultravioletvisible spectroscopies, field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron microscopy, Brunauer−Emmett−Teller analysis, and dynamic light scattering analysis. Hematite microcubes with an average edge size of 1535 nm were prepared during a 12 h hydrothermal process at 180 °C. Decreasing the time or temperature led to a goethite/hematite mixture. Nevertheless, applying 1 h of MW refluxing or US waves before 2 h of hydrothermal treatment, resulted in submicro hematite cubes with the average sizes of 640 or 236 nm in edge, respectively. The removal of three dyes using prepared hematite cubes was systematically investigated. The sample prepared by US+HT technique showed the best visible light photocatalytic activity towards reactive black 5 (RB5), an azo-dye, where almost all of the dye molecules were degraded in less than 40 min under a white LED-3W irradiation. In order to compare the photocatalytic activity of this sample with that of hematite structures in the literature, the removal of Methylene blue (MB) and Rhodamine B (RhB) was investigated. Our catalyst represented an enhanced photocatalytic activity against the photodegradation of 10 ppm MB (~100% in 12.5 min) and 10 ppm RhB (~96% in 25 min) with reaction rates constants of 0.641 and 0.127 min-1 .

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Designed synthesis of hematite-based nanosorbents for dye removal

Cited by 73 publications

References 46 publications

Influence of chemical structure of dyes on capacitive dye removal from solutions

Influence of chemical structure of dyes on capacitive dye removal from solutions

Photocatalytic upgrading α-Fe₂O₃ nanoparticles by incorporating MoS₂/rGO nanosheets

Highly monodispersed hematite cubes for removal of ionic dyes

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Designed synthesis of hematite-based nanosorbents for dye removal

Cited by 73 publications

References 46 publications

Influence of chemical structure of dyes on capacitive dye removal from solutions

Influence of chemical structure of dyes on capacitive dye removal from solutions

Photocatalytic upgrading α-Fe2O3 nanoparticles by incorporating MoS2/rGO nanosheets

Highly monodispersed hematite cubes for removal of ionic dyes

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Photocatalytic upgrading α-Fe₂O₃ nanoparticles by incorporating MoS₂/rGO nanosheets