Elemental distribution and porosity enhancement in advanced nano bimetallic catalyst

Ahmad, Mushtaq; Aziz, Arshad

doi:10.1016/j.powtec.2015.03.030

Cited by 5 publications

(7 citation statements)

References 50 publications

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“…In several reports, electrode peaks were negligible compared to substrate peaks [33,34] due to which estimation of grain size was crucial. The most intense (311) plane was characteristic peak of spinel phase.…”

Section: Structural Analysismentioning

confidence: 99%

Synthesis and electrochemical supercapacitive performance of nickel–manganese ferrite composite films

Zate

Shaikh

Jadhav

et al. 2015

Journal of Analytical and Applied Pyrolysis

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Section: Structural Analysismentioning

confidence: 99%

Synthesis and electrochemical supercapacitive performance of nickel–manganese ferrite composite films

Zate

Shaikh

Jadhav

et al. 2015

Journal of Analytical and Applied Pyrolysis

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“…Amount of H 2 O 2 used was in the range of 5.44–6.8 g/L (0.16–0.20 mol/L), which is almost twice of this work. In addition to excess H 2 O 2, longer reaction time (3–4 days) is required for the synthesis of improved Fe-exchanged zeolites as compared to two-step process [ 31 ]. This comparative study reveals that Fe-ZSM-5 synthesized through two-step is efficient and economical.…”

Section: Resultsmentioning

confidence: 99%

“…The objective of this work was to study the stability and specific properties of Fe-ZSM-5 synthesized using a newly developed 2-step process with respect to heterogeneous Fenton oxidation. This method is based on a previous one used to synthesize heterometallic nanoparticles at low temperatures [ 31 – 33 ], and relies on the development of a metal-organic framework and its thermal decomposition in order to produce fine iron oxide particles. The efficiency of the synthesized Fe-ZSM-5 was tested against the decolorization of Acid Blue 113 and Total Organic Carbon (TOC) removal.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Treatment Efficiency of Recalcitrant Wastewater Containing Textile Dyes Using a Newly Developed Iron Zeolite Socony Mobil-5 Heterogeneous Catalyst

et al. 2015

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Fenton oxidation, an advanced oxidation process, is an efficient method for the treatment of recalcitrant wastewaters. Unfortunately, it utilizes H2O2 and iron-based homogeneous catalysts, which lead to the formation of high volumes of sludge and secondary pollutants. To overcome these problems, an alternate option is the usage of heterogeneous catalyst. In this study, a heterogeneous catalyst was developed to provide an alternative solution for homogeneous Fenton oxidation. Iron Zeolite Socony Mobile-5 (Fe-ZSM-5) was synthesized using a new two-step process. Next, the catalyst was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, fourier transform infrared spectroscopy, and Brunauer-Emmett-Teller analysis and tested against a model wastewater containing the azo dye Acid Blue 113. Results showed that the loading of iron particles reduced the surface area of the catalyst from 293.59 to 243.93 m2/g; meanwhile, the average particle size of the loaded material was 12.29 nm. Furthermore, efficiency of the developed catalyst was evaluated by performing heterogeneous Fenton oxidation. Taguchi method was coupled with principal component analysis in order to assess and optimize mineralization efficiency. Experimental results showed that under optimized conditions, over 99.7% degradation and 77% mineralization was obtained, with a 90% reduction in the consumption of the developed catalyst. Furthermore, the developed catalyst was stable and reusable, with less than 2% leaching observed under optimized conditions. Thus, the present study proved that newly developed catalyst has enhanced the oxidation process and reduced the chemicals consumption.

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“…Fe-ZSM-5 catalyst was synthesized using "2-Step" process, which was developed and successfully evaluated for the production of a variety of heterometallic catalysts with improved features 35,36 . This process involves precipitation, followed by thermal decomposition.…”

Section: Synthesis Of Fe-monometallic Complexmentioning

confidence: 99%

“…Zhou et al52 synthesized different types of Fe-ZSM-5 catalysts and evaluated against Methyl Orange. Beside higher amounts of H 2 O 2, catalyst synthesis process for improved Fe-exchanged zeolites is complicated and requires longer time (3-4 days) as compared to currently used process36 . With excess amount of catalyst and H 2 O 2, and comparatively increased temperature (333K), Yaman et al 59 achieved 81% of COD reduction for the selected dye, Reactive Red 141.…”

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confidence: 99%

Treatment of textile effluent containing recalcitrant dyes using MOF derived Fe-ZSM-5 heterogeneous catalyst

et al. 2016

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Iron based heterogeneous catalysts are widely used in many industrial applications includingFenton Oxidation Processes (FOPs) to treat the effluents containing recalcitrant contaminants such as dyes. In this work, Metal Organic Framework (MOF) derived iron nano oxide particles supported on ZSM-5 Zeolite were synthesized under the optimized experimental conditions. Central Composite Design (CCD) method was employed to optimize the yield of the catalyst. The catalyst was then characterized using EDX, SEM, HRTEM, FTIR, STA and BET. Subsequently, the catalytic activity of the catalyst in Fenton Oxidation process was evaluated based on the degradation of the model azo dyes, Acid Blue 113, Methyl Orange, and Reactive Black. The optimized experimental yield was 81.5%, which was in agreement with the CCD predicted. Apart from high catalyst's yield, excellent mineralization efficiency was obtained where 77%, 71 % and 68% of Total Organic Carbon (TOC) removal were achieved for Acid Blue 113, Methyl Orange, and Reactive Black 5, respectively. Based on the yield and activity, it was concluded that the synthesized Fe-ZSM-5 is a promising catalyst for Fenton oxidation process.The specific surface area of the support and catalyst (in m2/g) was determined by measuring the volume of N 2 gas, using the BET (Brunauer-Emmett-Teller) method. Table S3 shows the specific surface areas, pore width, and pore volume. Presence of nano sized iron particles reduced the specific surface area of ZSM-5 from 297 to 241m 2 /g. Similarly, the pore volume was also changed from 0.17 to 0.11cm 3 /g. BET analysis confirmed the filling of iron oxide particles in the pores of ZSM-5 matrix 28 . Synthesized Fe-ZSM-5 had greater pore size (2.66 nm) than the parent ZSM-5 (2.45 nm).This may be attributed to multilayer formation of nano sized particles on ZSM-5 support, which can be seen FESEM images (Fig. 2). Changes in the pore size, and surface area were well supported by the literature 7, 28, 42 .Comparison Plot for Fe-MOFs.The optimization of the results obtained through experiments was carried out using Response Surface Methodology (RSM). Responses were kept within the desired ranges while the maximum yield was targeted. The suggested optimized values of temperature (33 o C), time (4 h) and stirrer speed (245 rpm) were validated through the experiment. The approximate yield of the Fe-complexes was 81.5%. There was a good agreement between the predicted and experimental results under optimized environment.Furthermore, in the impregnation step, 82-84% yield of Fe-ZSM-5 was observed. The yield can be further increased up to 90% with an efficient filtration system. Efficiency and Stability Evaluation of the Fe-ZSM-5 catalystExperiments exhibiting Fenton oxidation were carried out to degrade and decolorize three selected dyes. In order to examine the adsorption, the preliminary study was conducted with 100 mg/L of dye concentration. After four hours, percentage of adsorbed Acid Blue 113,

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Elemental distribution and porosity enhancement in advanced nano bimetallic catalyst

Cited by 5 publications

References 50 publications

Synthesis and electrochemical supercapacitive performance of nickel–manganese ferrite composite films

Synthesis and electrochemical supercapacitive performance of nickel–manganese ferrite composite films

Enhancement of Treatment Efficiency of Recalcitrant Wastewater Containing Textile Dyes Using a Newly Developed Iron Zeolite Socony Mobil-5 Heterogeneous Catalyst

Treatment of textile effluent containing recalcitrant dyes using MOF derived Fe-ZSM-5 heterogeneous catalyst

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