Copper and iron doped zinc oxide: chemical synthesis, characterization and their properties

Magar, Pooja P.; Kadam, Vishal S.; Mulla, Swaleha F.; Shaikh, Arif V.; Pathan, Habib M.

doi:10.1007/s10854-016-4835-4

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Kinetic models are used to investigate the rate of adsorption and potential rate-controlling steps. Te kinetics of adsorption was investigated using the pseudo-frst-order and pseudo-second-order models [11][12][13]. Te pseudofrst-order (PFO) equation can be expressed as…”

Section: Adsorption Isotherm Kinetics and Termodynamicsmentioning

confidence: 99%

“…Researchers all over the world are interested in nanomaterials because their particles are very small, they have very large specifc surface areas, and the active places on their surfaces are easily accessible [12]. Scientists are using a variety of nanomaterials that are much better at absorbing dyes and heavy metals.…”

Section: Introductionmentioning

confidence: 99%

“…Scientists are using a variety of nanomaterials that are much better at absorbing dyes and heavy metals. Zinc oxide (ZnO) is a good semiconductor that can be used in many diferent ways, such as in solar cells, optical coatings, photo catalysts, and nano-optoelectronic devices [12][13][14]. It is a good semiconductor because it has a band gap of 3.2 eV and a high excitation binding energy (60 MeV).…”

Section: Introductionmentioning

confidence: 99%

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Copper-Doped Zinc Oxide Nanoparticles: Synthesis, Characterization, and Application for Adsorptive Removal of Toxic Azo Dye

Sowjanya

King

Vangalapati

et al. 2023

International Journal of Chemical Engineering

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The goal of this research was to employ copper-doped zinc oxide nanoparticles (Cu/ZnONPs) as an adsorbent to remove the potentially toxic azo dye Congo red (CR). The Cu/ZnONPs were made using a chemical coprecipitation method, and their characteristics were examined using XRD, SEM, EDS, and FTIR methods. The response surface methodology (RSM) central composite design (CCD) is used to optimize the operational parameters’ agitation time, adsorbent dosage, solution pH, and initial concentration of CR solution during the adsorption process. The agitation period of 29.48 min, the Cu/ZnONP dosage of 0.301 g/L, the solution pH of 6.96, and the CR initial concentration of 90 mg/L resulted in a maximum CR adsorption of 94.14% and a desirability of 0.976. The kinetic findings fit the pseudo-second-order kinetic equation, and the equilibrium data agreed with the Langmuir isotherm (maximum uptake capacity qmax = 250 mg/g). During the thermodynamic experiments, endothermic, spontaneous, and physical adsorptions were observed.

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Section: Adsorption Isotherm Kinetics and Termodynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%