Catalytic properties of goethite prepared in the presence of Nb on oxidation reactions in water: Computational and experimental studies

Oliveira, Luiz C.A.; Ramalho, Teodorico C.; Souza, Eugenio F. de; Gonçalves, Maraísa; Oliveira, Diana Q. L.; Pereira, Márcio C.; Fabris, José Domingos

doi:10.1016/j.apcatb.2008.01.038

Cited by 87 publications

(44 citation statements)

References 25 publications

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“…0.5O 2 ) in a volumetric glass system. The addition of a radical scavenger organic compound (for example: phenol, ascorbic acid or hydroquinone) into the reaction medium is reported in the literature as a methodology for determining the H 2 O 2 decomposition mechanism [13][14][15]. Considering this, the reactions were also performed utilizing a 7 mL aqueous solution of 50 mg L -1 phenol.…”

Section: Hydrogen Peroxide Decompositionmentioning

confidence: 99%

Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition

2009

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The effect of hydrogen treatment (400°C/1 h) on the catalytic properties toward H 2 O 2 decomposition of iron oxide based materials dispersed over activated carbon were investigated. Two different supports were evaluated: a commercial activated carbon (ACM) and an activated carbon produced from spent coffee grounds (ACR). The catalysts were characterized using XRD, SEM, N 2 -sorption, XPS and TPR analysis. The main results suggest the formation of composites with high surface area ([800 m 2 g -1 ) and the hydrogen treatment resulted in a great increase in the catalytic activity, probably as a function of the reduced iron species (Fe 2? and Fe 0 ) formed with the treatment. Moreover, the catalyst prepared with ACR showed to be more active than that prepared from ACM.

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Section: Hydrogen Peroxide Decompositionmentioning

confidence: 99%

Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition

2009

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“…When Nb 5+ was inserted into goethite, oxygen vacancy sites were formed in the goethite structure, according to the Mössbauer spectra (Oliveira et al, 2008 (Oliveira et al, 2008)). Electrospray ionization coupled with mass spectrometry (ESI-MS) and density functional theory (DFT) calculations also detected other intermediates besides hydroxylation products.…”

Section: Multimetallic Iron-based Materialsmentioning

confidence: 99%

“…In addition, H 2 O 2 can undergo non-productive disproportionation to O 2 and H 2 O at the surface (Kwan and Voelker, 2002;Ortiz de la Plata et al, 2010) (e.g., reaction with oxygen vacancies on the surface (Oliveira et al, 2008) as detailed in Section 3.3) and scavenging of the generated ROS Wang, 2012a, 2012b;Xue et al, 2009a) (Eq. (4) and Table 2), both of which reduce the utilization efficiency of H 2 O 2 in the oxidation reactions.…”

Section: Heterogeneous Catalysis Mechanismmentioning

confidence: 99%

“…Multimetallic iron-based materials (Xu and Wang, 2012b), Nb-substituted goethite (Oliveira et al, 2008), CuFeZSM-5 (Dukkanci et al, 2010), Fe/M-MnO 2 (Huang et al, 2015), marmatite (Ramirez et al, 2014), natural vanadium-titanium magnetite (Liang et al, 2010). Supported iron-based materials Carbon-based materials as support Fe/activated carbon (Fe/AC) , ordered mesoporous carbon supported iron (Fe/OMC) (Duan et al, 2014), magnetite-loaded mesocellular carbonaceous material (Fe 3 O 4 / MSU-F-C) (Chun et al, 2012), iron-doped carbon aerogel (Duarte et al, 2009), iron-impregnated carbon aerogel (Duarte et al, 2009) (Zubir et al, 2015(Zubir et al, , 2014.…”

Section: Iron Minerals and Iron (Hydr)oxidementioning

confidence: 99%

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Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Yang

Men

et al. 2016

Journal of Environmental Sciences

415

141

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The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals (UOH) from reactions between recyclable solid catalysts and H 2 O 2 at acidic or even circumneutral pH. Hence, it can effectively oxidize refractory organics in water or soils and has become a promising environmentally friendly treatment technology. Due to the complex reaction system, the mechanism behind heterogeneous Fenton reactions remains unresolved but fascinating, and is crucial for understanding Fenton chemistry and the development and

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“…However, the application of traditional Fenton reaction is limited by the narrow working pH range (<4) [3,4], separation and recovery of the iron species specially in industrial wastewater treatment [5]. To overcome these drawbacks, some efforts have been made to develop heterogeneous Fenton systems [6,7] and many heterogeneous Fenton-like catalysts have been reported, such as iron oxides [8][9][10][11][12], iron-immobilized zeolites [13], clays [14,15], and carbon materials [16,17]. In comparison with the traditional ion Fenton catalysts, the heterogeneous catalysts can be used over a wider pH range for the degradation of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of methylene blue in layered manganese oxide suspension with H2O2

Zhang

Nie

et al. 2011

Journal of Hazardous Materials

115

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a b s t r a c tLayered birnessite-type manganese oxides (Na-OL-1) were prepared via a redox reaction involving MnO 4 − and Mn 2+ under markedly alkaline conditions. According to the XRD analysis, the resulting material exhibited a well-crystallized octahedral layer (OL) structure with several different phases, including ␤-MnOOH, ␣-MnOOH and ␥-Mn 3 O 4 . The catalyst was highly effective for the decolorization and degradation of methylene blue (MB) in the presence of H 2 O 2 at neutral pH. The tested MB was completely decolorized in Na-OL-1 suspension by the fraction dosing of H 2 O 2 (556.5 mM at the beginning and then 183.8 mM at 40 min). Based on the studies of electron spin resonance and the effect of radical scavengers, the 1 O 2 and O 2 •− were the main reactive oxygen species (ROS) in the reaction. It was found that both oxygen and ROS were generated from the decomposition of H 2 O 2 in Na-OL-1 suspension, wherein the decomposition pathways were proposed. The generation of H 2 O 2 in Na-OL-1 suspension at air atmosphere indicated that the existence of multivalent manganese oxides greatly enhanced the interfacial electron transfer, leading to the high activity of Na-OL-1.

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Catalytic properties of goethite prepared in the presence of Nb on oxidation reactions in water: Computational and experimental studies

Cited by 87 publications

References 25 publications

Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition

Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Decolorization of methylene blue in layered manganese oxide suspension with H2O2

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