Superb adsorption capacity of hydrothermally synthesized copper oxide and nickel oxide nanoflakes towards anionic and cationic dyes

Kumar, K. Yogesh; Archana, S.; Raj, T.N. Vinuth; Prasanna, B.P.; Raghu, M.S.; Muralidhara, H. B.

doi:10.1016/j.jsamd.2017.05.006

Cited by 26 publications

(6 citation statements)

References 26 publications

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“…According to the literature, the cation uptake is favorable at a pH > pH pzc , whereas the uptake of anions is encouraged at a pH < pH pzc of sorbent [ 66 ]. The obtained pH point of zero charge value is close to those obtained for some metal oxides such as CuO and NiO, which are in the range of 9–10 [ 67 ].…”

Section: Resultssupporting

confidence: 81%

Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

et al. 2021

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Removing methylene blue (MB) dye from aqueous solutions was examined by the use of nickel molybdate (α-NiMoO4) as an adsorbent produced by an uncomplicated, rapid, and cost-effective method. Different results were produced by varying different parameters such as the pH, the adsorbent dose, the temperature, the contact time, and the initial dye concentration. Adsorbent dose and pH had a major removal effect on MB. Interestingly, a lower amount of adsorbent dose caused greater MB removal. The amount of removal gained was efficient and reached a 99% level with an initial methylene blue solution concentration of ≤160 ppm at pH 11. The kinetic studies indicated that the pseudo-second-order kinetic model relates very well with that of the obtained experimental results. The thermodynamic studies showed that removing the MB dye was favorable, spontaneous, and endothermic. Impressively, the highest quantity of removal amount of MB dye was 16,863 mg/g, as shown by the Langmuir model. The thermal regeneration tests revealed that the efficiency of removing MB (11,608 mg/g) was retained following three continuous rounds of recycled adsorbents. Adsorption of MB onto α-NiMoO4 nanoparticles and its regeneration were confirmed by Fourier transform infrared spectroscopy (FTIR) analysis and scanning electron microscopy (SEM) analysis. The results indicated that α-NiMoO4 nanosorbent is an outstanding and strong candidate that can be used for removing the maximum capacity of MB dye in wastewater.

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Section: Resultssupporting

confidence: 81%

Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

et al. 2021

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“…Therefore, at lower concentrations, the number of dye molecules which are available in the solution is less as compared to the available sites on the adsorbent and at higher concentrations, the available sites for adsorption will be less. Therefore, the removal percentage of the dye is become less when the concentration increased, this is similar to other study on NiO NPs [16,17]. So, 10 mg l −1 can be considered as optimum concentration.…”

Section: Effect Of Initial Dye Concentrationssupporting

confidence: 83%

Adsorption of the eosin yellow dye by nickel oxide nanoparticles catalyzes via oxalate co-precipitation method: isotherm, kinetic and thermodynamic studies

Mahmood¹,

Eisa²,

Hammed³

2021

Phys. Scr.

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The Batch technique was used in the adsorption of eosin yellow (EY) dye from an aqueous solution by Nickel Oxide (NiO) nanoparticles (NPs). The Nickel Oxide nano-powder was synthesized by co-precipitation oxalate method and studied by x-ray diffraction (XRD), Scanning electron microscope (SEM) and Fourier transforms infrared spectroscopy (FTIR). The adsorbent Dosage, pH, contact time, and concentration of an aqueous solution were studied. Maximum eosin yellow dye removal efficiency was found to be 98.6% at pH 4, temperature 20 °C, initial dye concentration 10 mg l−1 (ppm), and the adsorbent dosage 0.05g at time 25 min. The adsorption process followed the Langmuir isotherm model with a maximum sorption capacity of 5.2167 and fitted to the pseudo-second-order kinetic model with a high correlation coefficient of 0.9941. Thermodynamic factors were determined and the obtained values refer that the adsorption of EY on NiO NPs is endothermic, non-spontaneous, and chemisorption processes.

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“…It should be studied as adsorbent for arsenic removal from water. Review from literature suggests that SnO2 is an effective adsorbent to remove other toxic metals like lead and cadmium [20] since it has the excellent capability and adsorption capacity. It is due to its interesting semiconducting property with band gap of 3.6 eV between O2 and Sn that give great capability of heavy metal ions removal [20].…”

Section: Resultsmentioning

confidence: 99%

“…In this research work, 11 metal oxides will be studied and adsorption capacity of these adsorbents will be unveiled by adopting Monte Carlo Simulation on Material Studio Software. The metal oxides selected to study for arsenic adsorption are Fe2O3, Al2O3, TiO2, ZrO2, Ag2O, CaO, CeO2, La2O3, MgO and SnO2 because of their applications in water treatment [14,15,16,17,18,19,20]. The metal oxides Fe2O3 and Al2O3 are used as commercial adsorbents for arsenic removal from water and they are included as a benchmark [9] for sorption calculations whereas the other eight metal oxides are studied for sorption loading to remove arsenic from water.…”

Section: Introductionmentioning

confidence: 99%

Molecular screening of metal oxides for arsenic removal from water

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Toxic metal arsenic in the ground water is poisonous and harmful that should be treated to ensure human health and safety. For many years, different technologies have been developed for the treatment of contaminated water and adsorption is an economical method in which a large number of adsorbents are being used including metal oxides. The selection of these metal oxides needs to be done systematically to choose the best metal oxide with good potential for arsenic removal from water. Previous work has been mostly focused on experimental study, which is time-consuming and expensive. Only a limited number of simulation study has been conducted, which is confined to only several specific adsorbents, such as oxides of iron. There is a need to do research for other metal oxides to evaluate which one is more capable of removing arsenic from water. In this research work, screening of metal oxides was done using Molecular Dynamics and Monte Carlo Simulation. The molecular structures were optimized and sorption calculations were performed at fixed pressure of 100kPa and temperature of 298K to observe the adsorption capability of metal oxides. Al2O3 and SnO2 were found to be good adsorbent for arsenic removal from water with adsorption capacity of 1681.80 g/g and 975.03 g/g respectively. Previously used Al2O3 was used as a benchmark for this research and adsorption capacity results also proved it. It was observed that SnO2 has potential to remove arsenic from water with adsorption capacity 975.03 g/g. The results displayed that SnO2 can be one of the best adsorbents for application of arsenic removal from water. It is concluded that apart from using conventional metal oxides for arsenic removal, other metal oxides should be studied and can also be used as an adsorbent as they can provide great adsorption capacity for arsenic removal from water.

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Superb adsorption capacity of hydrothermally synthesized copper oxide and nickel oxide nanoflakes towards anionic and cationic dyes

Cited by 26 publications

References 26 publications

Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

Adsorption of the eosin yellow dye by nickel oxide nanoparticles catalyzes via oxalate co-precipitation method: isotherm, kinetic and thermodynamic studies

Molecular screening of metal oxides for arsenic removal from water

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