Modification of ilmenite surface properties by superficial dissolution method

Parapari, Parisa Semsari; Irannajad, Mehdi; Mehdilo, Akbar

doi:10.1016/j.mineng.2016.03.016

Cited by 65 publications

(5 citation statements)

References 34 publications

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“…[ 41 ] The Fe 2+ ions quickly react with OH − ions to form stable greenish ferrous hydroxide (Fe(OH) 2 ), and by adding dilute HNO 3 at a later stage, most of the Fe(OH) 2 is oxidized into Fe 3+ ion. [ 22,44 ] A considerable amount of rutile mineral also dissolves in conc. HCl under high temperature, which helps to increase Ti 4+ ion concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the observations confirm the presence of Ag in FeTiO 3 /TiO 2 nanohybrid changes the chemical structure. [ 24,33,44 ]…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the observations confirm the presence of Ag in FeTiO 3 / TiO 2 nanohybrid changes the chemical structure. [24,33,44] XRF study shows the elemental composition of FeTiO 3 / TiO 2 and Ag-FeTiO 3 /TiO 2 nanohybrids. The FeTiO 3 /TiO 2 hybrid comprises Fe (53.14%) (w/w), Ti (44.38%) (w/w), Cr www.advmattechnol.de (0.83%), and Mn (1.65%).…”

Section: Characterization Of Ag-fetio 3 /Tio 2 and Fetio 3 /Tio 2 Nan...mentioning

confidence: 99%

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Visible Light Active Silver Decorated Iron Titanate/Titanium Dioxide Nanohybrid for Sterilization of Explants Grown by In Vitro Technique

Seneviratne

Munaweera

Peiris

et al. 2022

Adv Materials Technologies

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Visible light (VL) active silver decorated iron titanate/titanium dioxide (Ag‐FeTiO3/TiO2) nanohybrids derived from natural ilmenite sand effectively cleanse the exophytic plant pathogens in explants grown by in vitro techniques. VL active nanohybrid is synthesized by acid‐hydrolysis of natural ilmenite, followed by precipitation of the lixivium and decoration with Ag onto FeTiO3/TiO2 nanoparticles, and finally calcination under a nitrogen environment to obtain Ag‐FeTiO3/TiO2. A morphological study conducted using transmission electron microscopy (TEM) confirms the formation of Ag‐FeTiO3/TiO2. Powder X‐ray diffraction (PXRD) analysis shows that the nanohybrid primarily consists of anatase, iron titanate (FeTiO3), Ag2O, and Ag. X‐ray photoelectron spectroscopy (XPS) study suggests the presence of Ag0/Ag2O/Fe2O3 composites on the FeTiO3/TiO2 particle surface. The optical band gap significantly changes from 3.14 eV (ilmenite) to 2.80 eV after the decoration of FeTiO3/TiO2 with Ag. This nanohybrid is utilized as a surface‐sterilizing agent for in vitro establishment of the Dracaena sanderiana Sander ex Mast plant. Findings illustrate Ag‐FeTiO3/TiO2 nanohybrid‐based photo‐sterilization leads to the survival of 90% of the microbes’ free cultures while the material can be re‐used due to its photocatalytic behavior. Thus, the newly synthesized nanohybrid can replace harmful sterilization agents used in tissue culture techniques.

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Section: Resultsmentioning

confidence: 99%

“…Thus, the observations confirm the presence of Ag in FeTiO 3 /TiO 2 nanohybrid changes the chemical structure. [ 24,33,44 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Ag-fetio 3 /Tio 2 and Fetio 3 /Tio 2 Nan...mentioning

confidence: 99%

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Visible Light Active Silver Decorated Iron Titanate/Titanium Dioxide Nanohybrid for Sterilization of Explants Grown by In Vitro Technique

Seneviratne

Munaweera

Peiris

et al. 2022

Adv Materials Technologies

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“…Due to the poor floatability of ilmenite, pretreatment methods were conducted by many researchers prior to the flotation of Ti-bearing minerals, including surface dissolution, ultrasonic pretreatment, microwave irradiation, oxidation roasting, and more [2,26,27]. It has been reported that the strengthening effect of oxidation roasting and microwave irradiation are similar to ilmenite flotation [28].…”

Section: Introductionmentioning

confidence: 99%

A New Route of Roasting-Flotation-Leaching for the Beneficiation of Ti-Bearing Minerals from Altered Vanadium Titanomagnetite

Xu,

Chen,

Yang

et al. 2023

Minerals

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In this work, a complete beneficiation technical route combining physical and chemical methods, namely a roasting-flotation-leaching scheme, is proposed to produce a qualified grade Ti-concentrate from altered Vanadium titanomagnetite (VTM) ore. Based on the character of the ore sample, it is recommended to recover the Ti-bearing minerals, ilmenite and anatase, as composite mineral. Pretreatment experiments indicate that the oxidation roasting (800 °C) and acid washing methods increase the flotation indexes significantly. Flotation condition tests show that the optimal conditions are a grinding fineness of −0.045 mm 83%, sulfuric acid dosage of 2000 g/t, water glass dosage of 1500 g/t, oxalic acid dosage of 200 g/t, and EM328 dosage of 1500 g/t. An open flotation circuit test obtains a flotation concentrate with a TiO2 grade and recovery of 38.30% and 25.99%, respectively. A leaching exploration test shows that the TiO2 grade of the flotation concentrate can be improved to 53.90%. XRD analyses reveal that the ilmenite in the VTM ore is converted into anatase and rutile during the roasting process at 600–800 °C, but pseudobrookite begins to form at 900 °C. Compared to the flotation concentrate, it is confirmed that the content of Ti-bearing minerals is increased significantly in the leaching residue.

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“…Electron microscopic studies on ilmenite by Rao et al [10] indicate that the weathering/oxidation process can introduce trace amounts of oxides, including MnO, MgO, ZnO, and Al 2 O 3 , in FeTiO 3 . Modification of this material by physical and chemical processes has been well-studied and -documented [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Modeling of Defects, Dopants, and Diffusion in the Mineral Ilmenite

et al. 2019

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The iron titanium oxide ilmenite (FeTiO3) is a technologically and economically important mineral in the industrial preparation of titanium-based pigments and spintronic devices. In this study, atomistic simulation techniques based on classical pair potentials are used to examine the energetics of the intrinsic and extrinsic defects and diffusion of Fe2+ ions in FeTiO3. It is calculated that the cation anti-site (Fe‒Ti) cluster is the most dominant defect, suggesting that a small amount of cations exchange their positions, forming a disordered structure. The formation of Fe Frenkel is highly endoergic and calculated to be the second most stable defect process. The Fe2+ ions migrate in the ab plane with the activation energy of 0.52 eV, inferring fast ion diffusion. Mn2+ and Ge4+ ions are found to be the prominent isovalent dopants at the Fe and Ti site, respectively. The formation of additional Fe2+ ions and O vacancies was considered by substituting trivalent dopants (Al3+, Mn3+, Ga3+, Sc3+, In3+, Yb3+, Y3+, Ga3+, and La3+) at the Ti site. Though Ga3+ is found to be the candidate dopant, its solution enthalpy is >3 eV, suggesting that the formation is not significant at operating temperatures.

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Modification of ilmenite surface properties by superficial dissolution method

Cited by 65 publications

References 34 publications

Visible Light Active Silver Decorated Iron Titanate/Titanium Dioxide Nanohybrid for Sterilization of Explants Grown by In Vitro Technique

Visible Light Active Silver Decorated Iron Titanate/Titanium Dioxide Nanohybrid for Sterilization of Explants Grown by In Vitro Technique

A New Route of Roasting-Flotation-Leaching for the Beneficiation of Ti-Bearing Minerals from Altered Vanadium Titanomagnetite

Theoretical Modeling of Defects, Dopants, and Diffusion in the Mineral Ilmenite

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