Mechanical activation of TiO2/Fe2O3 nanocomposite for arsenic adsorption: effect of ball-to-powder ratio and milling time

Babudurai, Mercyrani; Nwakanma, Onyekachi; Romero-Núñez, Araceli; Manisekaran, Ravichandran; Velumani, S.; Castaneda, Homero; Jantrania, Anish

doi:10.1007/s40097-021-00388-8

Cited by 20 publications

(7 citation statements)

References 52 publications

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“…Many techniques were used for the separation and extraction of lanthanide elements such as adsorption, liquid–liquid extraction, membrane, ion exchange, and solid–liquid extraction (Gupta and Krishnamurthy 1992 ; Li and Sun 2005 ; Hassan and Elmaghraby 2019 ). One of the most efficient separating techniques is the adsorption process (Ahmadi et al 2022 ; Naeini et al 2022 ; Moradi and Sharma 2021 ; Babudurai et al 2021 ). This method has a number of advantages, including fewer wastes and a faster solid–liquid separation.…”

Section: Introductionmentioning

confidence: 99%

Extraction and separation feasibility of cerium (III) and lanthanum (III) from aqueous solution using modified graphite adsorbent

Youssef

Sami

Hassan

2022

Environ Sci Pollut Res

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Graphite (GR) and graphite/alginate (GRA) composite were synthesized utilizing the thermal annealing technique and used as a new adsorbent material for the selective separation and removal of La(III) and Ce(III) from aqueous solutions. Fourier transform infrared (FTIR) spectroscopy, thermal analysis (DTA, TGA), X-ray diffraction (XRD), surface area, porosity, and scanning electron microscope (SEM) were also used to characterize the generated material. Distinct experiments were performed to test the ability of the GRA to La(III) and Ce(III) removal, which include the effect of pH, shaken time, initial concentration of La(III), and Ce(III) at different temperatures range. After 20 min, both ions have reached equilibrium. The pseudo second-order kinetic model was chosen as one which best fits the experimental evidence and better reflects the chemical sorption process. Adsorption isotherm was studied using the Langmuir, Freundlich, and D-R models. The Langmuir model was used to better fit the results obtained. At 25 °C, Ce(III) and La(III) have maximum monolayer capacities of 200 and 83.3 mg/g, respectively. The sorption was endothermic reaction and spontaneous, as illustrated by the data of thermodynamics studies. GRA has the ability to be used as a novel lanthanide adsorbent material, especially for selective separation between Ce(III) and La(III).

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Section: Introductionmentioning

confidence: 99%

Extraction and separation feasibility of cerium (III) and lanthanum (III) from aqueous solution using modified graphite adsorbent

Youssef

Sami

Hassan

2022

Environ Sci Pollut Res

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“…It may result in a decrement of the energy band gap of the dye/TiO2 to TiO2. However, unlike the usual sorption-ion exchange mechanism for heavy metal removal in photo catalytic processes [20], the released charges in the DSSCs are carried by the I − /I − 3 electrolyte to the electrodes.…”

Section: Uv-vis Characterizationsmentioning

confidence: 99%

Comparative study of dyes and effects of purification on selected plants for dye-sensitized solar cells application

Akwolu,

Offiah,

Agbogu

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The extensive research and interest in dye-sensitized solar cells (DSSCs) due to their relatively low cost, simple preparation methodology, low toxicity, and comparable ease of production continues to garner momentum over recent decades. This study explores the extraction and purification of dyes from different plant sources for solar cell applications. The results obtained from these extracts commonly serve societies ranging from dyes for textiles to medicinal applications for multiple ailments and also for DSSC. The purification using dyechloromethyl (DCM), an organic solvent, and column chromatography helps separate the impurities and other solutions and get the pigment responsible for each dye. The dyes were deposited using a simple drop-casting technique on a doctor-blade fabricated TiO2 layer. The UV-Vis characterizations of the dyes showed an increase in the band gap values after the purification, and FTIR characterizations showed the presence of chemical structures needed for dye-sensitized solar cells. EIS studies showed a decrease in the impedance values after purification, which could positively enhance the efficiency of solar cell devices.

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“…High volume of the dye molecules were bonded with the crystalline surface IOP Publishing doi:10.1088/1755-1315/1178/1/012007 2 of TiO2, this is due to the highly porous structure and the large surface area of the electrode [13]. The more desirable anatase TiO2 phase, considering the material content and morphology, is a low-temperature stable form that delivers transparent and colorless mesoscopic films [14] with a higher energy band gap of 3.2 eV [15].…”

Section: Introductionmentioning

confidence: 99%

Extraction and purification of Lawsonia inermis (laali) dyes for applications in dye-sensitized solar cell

Akwolu,

Nwakanma,

Offiah

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This study explores the extraction of dyes from Lawsonia inermis (Laali) and the effects of purification on the dyes for solar cell applications. The TiO2 thin films were synthesized through Doctor Blade’s technique while the dye was applied on the thin film using a simple drop-casting method. Characterization of the doctor-blade deposited TiO2 thin-film using XRD confirmed the successful deposition of anatase crystallite structure with a mesoporous morphology confirmed using SEM analysis. The UV-Vis, FTIR, and EIS characterizations of the dyes showed increase in band gap, adequate functional groups and lower charge resistance respectively after the purification, which could contribute positively to enhancing the efficiency of solar cell devices.

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Mechanical activation of TiO2/Fe2O3 nanocomposite for arsenic adsorption: effect of ball-to-powder ratio and milling time

Cited by 20 publications

References 52 publications

Extraction and separation feasibility of cerium (III) and lanthanum (III) from aqueous solution using modified graphite adsorbent

Extraction and separation feasibility of cerium (III) and lanthanum (III) from aqueous solution using modified graphite adsorbent

Comparative study of dyes and effects of purification on selected plants for dye-sensitized solar cells application

Extraction and purification of Lawsonia inermis (laali) dyes for applications in dye-sensitized solar cell

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