Synthesis and characterization of zero-valent iron nanoparticles supported on SBA-15

Santos, Felipe Sombra dos; Lago, Fernanda Rodrigues; Yokoyama, Lídia; Fonseca, Fabiana Valéria da

doi:10.1016/j.jmrt.2016.11.004

Cited by 51 publications

(19 citation statements)

References 22 publications

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“…are used as Fenton catalysts with H 2 O 2 [11,12]. Porous materials (e.g., activated carbon, clay, zeolite, multi-walled carbon nanotubes and polymers) can also be used as support for iron oxides [13,14]. In this case, the overall performance of the Fenton reaction can be increased due to the extra cooperation of the catalyst’s support to adsorb pollutant molecules, and to initiate further pathways for radical generation and pollutants decomposition [13,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Porous materials (e.g., activated carbon, clay, zeolite, multi-walled carbon nanotubes and polymers) can also be used as support for iron oxides [13,14]. In this case, the overall performance of the Fenton reaction can be increased due to the extra cooperation of the catalyst’s support to adsorb pollutant molecules, and to initiate further pathways for radical generation and pollutants decomposition [13,14,15]. In Fenton-like processes, the generation of free radicals and the degradation of contaminants are carried out by using a catalyst together with magnetic field, ultrasound energy, ultraviolet radiation, microwave irradiation, other oxidizing reagents (e.g., persulfate), or a combination of them [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

2018

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Heterogeneous Fenton processes with solid catalysts have gained much attention for water and wastewater treatment in recent years. In the field of solid catalysts, zero valent iron (ZVI) is among the most applicable due to its stability, activity, pollutant degradation properties and environmental friendliness. The main limitation in the use of ZVI in heterogeneous Fenton systems is due to its deactivation in neutral and alkaline conditions, and Fenton-like processes have been developed to overcome this difficulty. In this review, the effect of solution pH on the ZVI-Fenton performance is discussed. In addition, the pH trend of ZVI efficiency towards contaminants removal is also considered in oxic solutions (i.e., in the presence of dissolved O2 but without H2O2), as well as in magnetic-field assisted Fenton, sono-Fenton, photo-Fenton and microwave-Fenton processes at different pH values. The comparison of the effect of pH on ZVI performance, taking into account both heterogeneous Fenton and different Fenton-like processes, can guide future studies for developing ZVI applications in water and wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

2018

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“…While TEM image of colloidal Fe(0) particles ( Figure 3(b)) was measured immediately after being synthesized. The micrograph image shows a nanosphere particle with the diameters is in the range of ~20-70 nm and can be distinguished from each particle (Santos et al 2017;Sun et al 2006;Zhang et al 2013). In the closer inspection of the TEM image, the metallic iron and iron oxide phases can be distinguished from the corresponding color contrast.…”

Section: Characterization Of Colloidal Fe(0)mentioning

confidence: 98%

“…Nanoparticles of zero valent iron, Fe(0) has electromagnetic and electrostatic properties which will be useful in the separation and regeneration of the reactant (Chatterjee et al 2010;Rosická et al 2011). Fe(0) nanoparticles was reported excelled in various applications on account of large surface area and high reactivity (Santos et al 2017). However, by considering the nano-sized and the prompt reaction of Fe(0), the oxidation process rates is likewise to be rapid and tend to form into iron oxides during preparation of the material (Feitz et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Insight Observation into Rapid Discoloration of Batik Textile Effluent by in situ Formations of Zero Valent Iron

Sajab¹,

Ismail

Santanaraj

et al. 2019

JSM

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This study aimed to investigate the discoloration of textile effluent from batik industrial wastewater by Fenton oxidation process using Fe(II), Fe(III) and in situ formation of zero valent iron (Fe(0)). The controlled parameters indicate the Fenton oxidation reaction is ideal on effluent at pH5, concentration colour of 4005 mg/L Pt-Co units using 0.5 mg/mL of catalyst dosage to meet the regulation for Malaysian quality water standard. The optimization of Fe(0) precursors, Fe(II) shows a higher discoloration efficiency in comparison with Fe(III). The synthesized particles of Fe(0) shows a nano spherical structure in the diameter range of 20-70 nm, aggregated and into a chain-like formation. Subsequently, the performance of Fe(0) was improved up to 97% discoloration in comparison with 89% discoloration by Fe(II). Whereas, the in situ formation of Fe(0) in batik effluent shows a complete discoloration ascribable to higher reactivity than partially oxidized of synthesized ex situ Fe(0). On top of that, in situ Fe(0) performed at the expeditious reaction in less than five min. Additionally, the regeneration of Fe(0), Fe(II) and Fe(III) show a potential of catalyst recyclability up to three cycles of Fenton oxidation but with a tolerable reduction to 62.1% of effluent discoloration.

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“…As a result, it normally plays a role of adsorbent, not acidic or redox catalysts [7,8]. In order to be used as acidic or redox catalysts, SBA-15 should be modified by incorporation of transition metals into framework using direct and/or postsynthesis [9][10][11][12][13][14][15][16][17]. Aluminium ions (Al 3+ ) insertion into the SBA-15 creates acid sites in the structure which is extremely important for acid-catalyzed reaction.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Conversion to 5 Hydroxymethyl Furfural (5-HMF) Using Al-Incorporated SBA-15 as Highly Efficient Catalyst

Phạm

Nguyen

et al. 2019

Journal of Chemistry

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Al-incorporated SBA-15 samples (xAl/SBA-15) were successfully prepared by "atomic implantation" method. e samples were characterized by X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), N 2 adsorption-desorption isotherms (BET), and temperature-programmed desorption (NH 3 -TPD). In this catalyst, metal oxide species were highly dispersed on the SBA-15 surface and existed as isolated atoms. It was shown that the Al incorporation lead to the formation of medium and strong acid sites. e catalytic activity and selectivity were tested in a mild hydrothermal process for degradation of cotton cellulose to 5-hydroxymethyl furfural (5-HMF). A cellulose conversion of 68.5% and 5-HMF selectivity of 62.1% after 2 h of reaction at 170°C were achieved. e very high 5-HMF yield (42.57%) obtained in this paper is much higher than that was reported in the literature.

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Synthesis and characterization of zero-valent iron nanoparticles supported on SBA-15

Cited by 51 publications

References 22 publications

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Insight Observation into Rapid Discoloration of Batik Textile Effluent by in situ Formations of Zero Valent Iron

Cellulose Conversion to 5 Hydroxymethyl Furfural (5-HMF) Using Al-Incorporated SBA-15 as Highly Efficient Catalyst

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