Green and rapid synthesis of iron molybdate catalyst by mechanochemistry and their catalytic performance for the oxidation of methanol to formaldehyde

Kong, Lingtao; Zhang, Mei; Li, Xue; Ma, Fengyun; Wei, Baogang; Wumaier, Kamalebieke; Zhao, Jigang; Lu, Zheng-ping; Sun, Jingfang; Gao, Fuxiang

doi:10.1016/j.cej.2019.01.164

Cited by 35 publications

(21 citation statements)

References 44 publications

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“…Recently, an alternative approach based on mechanochemistry for materials synthesis, − waste treatment, and metal alloying, has received considerable attention due to its eco-friendliness and moderate operating conditions. Mehrabani et al demonstrated the preparation of metallic tungsten from scheelite via co-grinding with magnesium, revealing the positive effect of mechanochemistry on the chemical reduction .…”

Section: Introductionmentioning

confidence: 99%

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Che

Zhang

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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Lead sulfate residue (LSR) is an important secondary lead resource also categorized as a hazardous waste, which has gained great attention in clean and sustainable utilization technology due to the shortage of primary resources and environmental pollution. The current methods for LSR treatment involve a potential environmental risk including emission of SO x gas and generation of waste acids and alkali. Herein, an environmentally friendly method is proposed for treating LSR, by which lead was reduced under ambient conditions via mechanical ball milling using iron powder as the reductant. The phase transformation of lead was analyzed by X-ray diffraction, scanning electron microscopy/energy-dispersive X-ray spectrometry, Fourier transform infrared, and X-ray photoelectron spectroscopy, revealing that the reduction time, rotation speed, mass ratio of ball to material (B/M), and iron powder dosage positively influenced the reduction of lead sulfate. The highest lead sulfate reduction efficiency of 99.9% was obtained under optimum conditions: rotation speed of 300 rpm, reduction time of 2 h, B/M of 15 g/g, and 1.5 times the theoretical dosage of iron powder. The generated ferrous sulfate was subsequently removed by water washing, and excess iron powder was separated by melting, accompanied by metallic lead produced with a high purity of 99.2%. This process is simple and environmentally friendly, showing good potential for industrial application.

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Section: Introductionmentioning

confidence: 99%

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Che

Zhang

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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“…It has garnered an exponentially increasing degree of interest, it has been synthesized at the nanoscale by different methods and it has been involved in many environmental and industrial applications [31]. In fact, iron molybdate has important applications in solid oxide fuel cells, sodium and lithium ion batteries, catalysis and sensors [32], propylene oxide production via the oxidation of propylene [33,34], methanol oxidation to formaldehyde [35] and photo-combined heterogeneous activation of persulfate for the removal of micropollutants [36]. In addition, the coprecipitation preparation of Fe 2 (MoO 4 ) 3 nanopowder was applied for the photocatalytic degradation of rhodamine B with an efficiency of~97% [37].…”

Section: Introductionmentioning

confidence: 99%

Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions

et al. 2020

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The present study investigated iron molybdate (Fe2(MoO4)3), synthesized via a simple method, as a nanosorbent for methylene blue (MB) dye removal from aqueous solutions. Investigations of the effects of several parameters like contact time, adsorbent dose, initial dye concentration, temperature and pH were carried out. The results showed that MB removal was affected, significantly, by adsorbent dose and pH. Interestingly, lower values of adsorbent dose resulted in the removal of higher amounts of MB. At the optimum pH, the removal efficiency of 99% was gained with an initial MB concentration of ≤60 ppm. The kinetic study specified an excellent correlation of the experimental results with the pseudo-second-order kinetics model. Thermodynamic studies proved a spontaneous, favorable and endothermic removal. The maximum amount of removal capacity of MB dye was 6173 mg/g, which was determined from the Langmuir model. The removal efficiency was shown to be retained after three cycles of reuse, as proven by thermal regeneration tests. The presence and adsorption of the dye onto the Fe2(MoO4)3 nanoparticle surface, as well as the regeneration of the latter, was ascertained by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). These findings are indicative that the investigated nanosorbent is an excellent candidate for the removal of MB in wastewater.

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“…The Fenton (H 2 O 2 /FeII) or Fenton like (H 2 O 2 /FeIII) reaction, are well known reactions, which are used mainly to generate reactive oxygen species (HO• and HOO•) with H 2 O as by-product and are used widely in the treatment of waste water [15]. Iron catalysts have been employed on the industrial oxidation process of methanol to formaldehyde [16], and Fischer-Tropsch synthesis (nCO + {2n(+1)}H 2 → C n H 2n(+2) + nH 2 O) have considered an attractive way to convert natural/shale gas, coal, biomass, and CO 2 into clean liquid fuels and high value-added chemicals via syngas (H 2 + CO) [17].…”

Section: Introductionmentioning

confidence: 99%

Redox effects in Cu, Co or Fe in oxides nanocrystals with high catalytic activity for the acetonitrile combustion

2020

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The cobalt, copper and iron oxides were investigated in selective catalytic combustion (SCC) of acetonitrile toward N 2 in gas phase. Catalysts were characterized by physical-chemical technics like XRD, H 2-TPR, DRS UV-Vis, whose confirmed crystalline phases of CuO, Co 3 O 4 and Fe 2 O 3. Thermodynamic stability of crystalline phase from metal oxides ruled important contributions in redox properties and become able to compare clearly the catalytic activity of the three catalyst. Relationship between H 2-TPR analysis and catalytic results obtained showed great relevance to understand how metal oxide works on reaction, who were related to easy redox process involved. SCC studies were carried out with range of 100-600 °C and Co 3 O 4 showed best activity (100% conversion at 570 °C) and high selectivities to N 2 and CO 2 starting in lower temperature. Byproducts from nitrogen-compounds were observed in low quantities for all catalysts.

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Green and rapid synthesis of iron molybdate catalyst by mechanochemistry and their catalytic performance for the oxidation of methanol to formaldehyde

Cited by 35 publications

References 44 publications

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions

Redox effects in Cu, Co or Fe in oxides nanocrystals with high catalytic activity for the acetonitrile combustion

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