Investigation on the catalytic activity of doped low-percentage oxide catalysts Mn/ZnO obtained from oxalate precursor

Donkova, B.; Milenova, Katja I.; Mehandjiev, D.

doi:10.2478/s11532-007-0071-3

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…World crude steel production reached just over 1.8 billion tons in 2018. In 2017, global electric arc furnace (EAF) output accounted for about 30% of global steel production (around 480 million tons) [1,2]. During the production of 1 ton of steel in EAF, 10-30 kg of dust is generated [3].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Kalpakli

Caymaz

İlhan

et al. 2021

J. Sustain. Metall.

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A large amount of electric arc furnace dust (EAFD) is produced as hazardous waste materials during steelmaking in electric arc furnace. EAFD includes a considerable amount of zinc. Recovery of Zn as ZnO from EAFD via mechanochemical leaching, solvent extraction, precipitation, and thermal decomposition route was investigated. Dissolution behavior of Zn, Fe, Mn, Si, Mg, and Ca during the mechanochemical leaching of EAFD in H 2 SO 4 solution was determined. Optimum mechanochemical leaching parameters were considered as 10 g of EAFD, 2 M H 2 SO 4 , 240 min of reaction time, ball to the dust weight ratio of 20, and rotational speed of 500 rpm. D2EHPA solution (20%, vv) was used for solvent extraction of Zn from mechanochemical leach solution. McCabe-Thiele diagrams constructed for extraction and stripping stages indicated that 95% of zinc in the leach solution was extracted in three stages at A:O = 1:1, while 97% of Zn was stripped from loaded organic phase at operating line of A:O = 4:1. ZnC 2 O 4 •2H 2 O powder was precipitated from strip solution obtained by solvent extraction by adding oxalic acid solution at pH 4. Thermal properties of ZnC 2 O 4 •2H 2 O precipitated were investigated by thermogravimetric-differential thermal analysis technique. High-purity ZnO was obtained by thermal decomposition of ZnC 2 O 4 •2H 2 O precipitated.

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Section: Introductionmentioning

confidence: 99%

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Kalpakli

Caymaz

İlhan

et al. 2021

J. Sustain. Metall.

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“…This method is cost effective as we have carried out the synthesis in a simple refluxing glass assembly instead of an autoclave, which is highly expensive. The oxalate acts as an excellent precursor for the synthesis of pure and homogeneous oxide nanoparticles with high surface area because of its low decomposition temperature and enables the modification in physical properties of oxide semiconductors by doping the precursor in the course of its synthesis . Recently, this method has been used for the preparation of nanocrystalline Zn 1− x Ni x O, Zn 1− x Co x O, and In 2− x Mn x O 3 with controlled morphological properties.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal Synthesis of In_2−xCo_xO₃ (0.05 ≤ x ≤ 0.15) Dilute Magnetic Semiconductors: Optical, Magnetic, and Dielectric Properties

et al. 2013

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Highly crystalline and monophasic nanoparticles of In 2Àx Co x O 3 (0.05 ≤ x ≤ 0.15) were successfully synthesized by the solvothermal method through an oxalate precursor route. Collective evidence from X-ray diffraction and reflectance measurements suggest that the Co 2+ is incorporated into the In 2 O 3 lattice site. Effect of cobalt dopant on the growth and morphology of indium oxide was studied by transmission electron microscopy. It has been observed that particle size decreases from 23 to 9 nm on increasing the Co concentration. High surface area has been obtained, with values ranging between 66 and 151 m 2 /g, respectively. Values for the dielectric constant were around 40. All these solid solutions show paramagnetic behavior with weak antiferromagnetic interactions.

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“…Zinc oxide is one of such materials that have received special interest because it has both charge and spin degrees of freedom in a single matrix, which lead to the interplay of functionalities (magnetic and electronic). Also the oxalates from the 3d metals such as zinc are isomorphous in nature, which enables the enhancement of physical properties of oxide semiconductors by doping the precursor in the course of synthesis [2][3][4][5][6]. Many research groups that have worked on doping with transition metals have used zinc oxide as a good host material for realizing wide band-gap dilute magnetic semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization and Magnetic Properties of Undoped and Ti-Doped ZnO Nanoparticles Prepared by Modified Oxalate Route

Etape

Foba-Tendo

Ngolui³

et al. 2018

Journal of Nanomaterials

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Ti-doped zinc oxide and pure zinc oxide nanoparticles were synthesized by a modified oxalate route using Averrhoa carambola fruit juice as a natural source of oxalate. The characteristics of the precursors have been investigated by FTIR, TGA, and XRD. The results from the investigation revealed that the precursors are zinc oxalate and Ti-doped zinc oxalate which readily decompose at 450 ∘ C. The as-prepared precursors were calcined at 450 ∘ C for 4 hours, and the decomposition products have been characterized by XRD, SEM, EDX, and VSM. XRD results revealed crystallinity with hexagonal wurtzite structure, while the average grain size was found to be 26 nm for Ti-doped ZnO and 29 nm for ZnO, using calculations based on Debye-Scherrer equation. Furthermore, the morphological studies by SEM showed particle agglomeration, while the presence of Ti 3+ in the zinc oxide lattice is indicated by EDS analysis. Finally the hysteresis loop from VSM results shows that Ti-doped ZnO exhibits ferromagnetism.

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Investigation on the catalytic activity of doped low-percentage oxide catalysts Mn/ZnO obtained from oxalate precursor

Abstract: Abstract:The precursors with a low manganese content ≤ 0.07% Mn were synthesized by spontaneous crystallization from Zn

Cited by 8 publications

References 33 publications

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Solvothermal Synthesis of In_2−xCo_xO₃ (0.05 ≤ x ≤ 0.15) Dilute Magnetic Semiconductors: Optical, Magnetic, and Dielectric Properties

Structural Characterization and Magnetic Properties of Undoped and Ti-Doped ZnO Nanoparticles Prepared by Modified Oxalate Route

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Investigation on the catalytic activity of doped low-percentage oxide catalysts Mn/ZnO obtained from oxalate precursor

Abstract: Abstract:The precursors with a low manganese content ≤ 0.07% Mn were synthesized by spontaneous crystallization from Zn

Cited by 8 publications

References 33 publications

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Recovery of Zn as ZnO from Steelmaking Waste Materials by Mechanochemical Leaching, Solvent Extraction, Precipitation, and Thermal Decomposition Route

Solvothermal Synthesis of In2−xCoxO3 (0.05 ≤ x ≤ 0.15) Dilute Magnetic Semiconductors: Optical, Magnetic, and Dielectric Properties

Structural Characterization and Magnetic Properties of Undoped and Ti-Doped ZnO Nanoparticles Prepared by Modified Oxalate Route

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Solvothermal Synthesis of In_2−xCo_xO₃ (0.05 ≤ x ≤ 0.15) Dilute Magnetic Semiconductors: Optical, Magnetic, and Dielectric Properties