Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Gao, Yaowen; Wang, Yan; Zhang, Hui

doi:10.1016/j.apcatb.2014.11.005

Cited by 173 publications

(38 citation statements)

References 68 publications

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“…The iron-based catalysts can be directly used in the chemical reaction in the form of finely divided powders or immobilized on solid supports 4 . Several works have demonstrated that the use of different supports to disperse iron oxides lead to greater efficiency in catalytic oxidation processes [5][6][7] . Among the various available supports, ZSM-5 zeolite has been widely used as catalyst support in Fenton oxidation systems due to their intrinsic properties such as thermal stability, high surface area, and uniform pores and channels [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

et al. 2016

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Mesoporous Fe 2 O 3 -supported ZSM-5 zeolites were prepared by carbon-templating and subsequently evaluated as photo-Fenton catalysts to degrade a dye used as a model heavy organic pollutant. The synthesis procedure of the mesoporous ZSM-5 zeolites was performed employing a nucleating gel and carbon particles as mesopores template. Thereafter, the precursor salt of the iron oxide (Fe 2 O 3 ) was impregnated and then calcined to obtain the final catalyst. For comparison purposes, a conventional Fe 2 O 3 -supported ZSM-5 zeolite was also prepared. The results showed that the amount of intracrystalline mesopores formed in the ZSM-5 crystals was influenced by the amount of carbon added into the synthesis mixture. In comparison to the conventional prepared catalyst, the mesoporous Fe 2 O 3 /ZSM-5 ones showed an improved performance in the degradation of the target organic pollutant by the photo-Fenton reaction, which was attributed to the improvement of their textural properties as consequence of the mesopores generation.

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Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

et al. 2016

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“…However, because of the severe aggregation and the low specific surface area of the self-assembled MoS 2 flower-like microspheres (Supplementary Figures S1b-f), 25,35 its RhB adsorption capacity (37 mg g − 1 ) was substantially smaller than that of 3D MoS 2 /Bi 2 S 3 (50 mg g − 1 ; Supplementary Figures S12a-c), although less MoS 2 mass was present in the hybrid. Furthermore, RhB might be adsorbed by van der Waals or π-π interactions and hydrogen bonding rather than electrostatic forces, 41 despite the negatively charged surface of the photocatalysts at the given pH of 3.95-5.68 ( Supplementary Figures S13a and b).…”

Section: Adsorption-promoted Degradation Of Low-concentration Refractmentioning

confidence: 99%

Layer-controlled growth of MoS2 on self-assembled flower-like Bi2S3 for enhanced photocatalysis under visible light irradiation

et al. 2016

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Metal sulfide semiconductors, such as molybdenum disulfide (MoS 2 ) and bismuth trisulphide (Bi 2 S 3 ), are of considerable interest for their excellent applications in photocatalysis and in many other fields. However, the controllable synthesis of MoS 2 /Bi 2 S 3 hybrid nanostructures remains a challenge. In this study, we report a unique sacrificial templating strategy for preparing layer-controlled MoS 2 on three-dimensional (3D) Bi 2 S 3 micro-flowers. For this approach, Bi 2 S 3 was utilized as a sacrificial template to regulate the ion exchange, and the dosage of molybdenum was adjusted to tune the dynamic formation, thus converting the MoS 2 nanosheets on the Bi 2 S 3 micro-flowers from monolayer to multilayer. Such a 3D flower-like hybrid nanostructure enables MoS 2 /Bi 2 S 3 to exhibit adsorption-promoted photocatalysis under visible light irradiation, especially for the excellent photodegradation of low-concentration organic pollutants, for example, azo dye and atrazine. The observed superiority of the 3D MoS 2 /Bi 2 S 3 was mainly attributed to the increased mass transfer, robust light-harvesting capacity, improved charge separation, lower oxygen-activation barrier and enhanced active oxygen yield. Our findings are of interest for the development of novel S-based photocatalysts and provide a new opportunity to efficiently remove low-concentration refractory pollutants.

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“…Researchers mention coagulation, electro-coagulation, biological processes and adsorption, in addition to the use of integrated processes, once the treatment of residual water has been one of the main concerns in terms of environmental protection. In addition to these, Advanced Oxidation Processes (AOPs) have been proposed as alternative technologies for isolated or combined treatment of wastewater of several classes, including the one generated during the purification of biodiesel [2][3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to other APOs, the homogeneous Fenton process has been widely studied to degrade several compounds and/or improve the biodegradability of aqueous effluents, and it is relatively cheap and easy to operate [5] . In this process, hydrogen peroxide (H 2 O 2 ) is catalyzed by ferrous ion (Fe 2+ ) in order to generate hydroxyl radicals (•OH), according to Equation 1.…”

Section: Introductionmentioning

confidence: 99%

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Use of chitosan in the remediation of water from purification of biodiesel

2018

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ObstractThis article evaluates the efficiency of the degradation of pollutants present in water from the purification of biodiesel, characterized by high content of chemical oxygen demand (COD), suspended solids (SS), oils and greases, methanol, soap, and glycerol. The treatment process proposed was of the photo-Fenton type using iron immobilized in chitosan. The characterization of the material was performed according to degree of deacetylation (DD) and thermal stability (TG). The results revealed a DD of 66.5% and that the material undergoes decomposition in three temperature stages: 100; 150-350 and above 350 °C. The evaluated parameters were: COD, suspended solids, oils and greases, color and turbidity. After a 180-minutes long treatment, the removal percentage was 94.52, 70, 55, and 60% respectively. These results indicate that the photo-Fenton process can be an alternative for pre-treatment this type of effluent.

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Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Cited by 173 publications

References 68 publications

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

Layer-controlled growth of MoS2 on self-assembled flower-like Bi2S3 for enhanced photocatalysis under visible light irradiation

Use of chitosan in the remediation of water from purification of biodiesel

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