Novel green strategy for CuO–ZnO–C nanocomposites fabrication using marigold (Tagetes spp.) flower petals extract with and without CTAB treatment for adsorption of Cr(VI) and Congo red dye

Prajapati, Anuj Kumar; Mondal, Monoj Kumar

doi:10.1016/j.jenvman.2021.112615

Cited by 54 publications

(19 citation statements)

References 56 publications

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“…96-721-2243, which represents the monoclinic phase of copper oxide. The XRD results confirm that sample ZC100 is formed completely of tenorite, which is pure copper oxide with a monoclinic phase [ 36 , 45 , 46 , 47 ].…”

Section: Resultsmentioning

confidence: 63%

“…Figure 3 represents the XRD patterns of the samples ZC0, ZC25, ZC50, ZC75, and ZC100 prepared by the green-hydrothermal technique (pH = 10, T = 250 ◦C, t = 2.5 h) and calcined at 300 °C for 2 h. The ZC0 sample shows peaks at 2θ~31.96°, 34.61°, 36.44°, 47.74°, and 56.73° corresponding to the diffraction planes (1 0 0), (0 0 2), (1 0 1), (0 1 2), and (1 1 0) of a wurtzite hexagonal structure according to Card no. 96-900-4179 [ 36 ]. The XRD results confirm that sample ZC0 is formed completely of zincite, which is pure zinc oxide with a hexagonal phase.…”

Section: Resultsmentioning

confidence: 99%

“…A. Prajapati et al prepared CuO-ZnO-C nanocomposites by using extract of Tagetes spp. petals in the presence of CTAB surfactant [ 36 ]. Moreover, the vapor deposition technique was used to prepare CuO-ZnO and applied in optoelectronics [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

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Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

2022

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This work represents a novel combination between Acacia nilotica pods’ extract and the hydrothermal method to prepare nanoparticles of pure zinc oxide and pure copper oxide and nanocomposites of both oxides in different ratios. Five samples were prepared with different ratios of zinc oxide and copper oxide; 100% ZnO (ZC0), 75% ZnO: 25% CuO (ZC25), 50% ZnO: 50% CuO (ZC50), 25% ZnO: 75% CuO (ZC75), and 100% CuO (ZC100). Several techniques have been applied to characterize the prepared powders as FTIR, XRD, SEM, and TEM. The XRD results confirm the formation of the hexagonal wurtzite phase of zinc oxide and the monoclinic tenorite phase of copper oxide. The microscopy results show the formation of a heterostructure of nanocomposites with an average particle size of 13–27 nm.

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Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 99%

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Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

2022

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“…Positive skewness implies strain occurrence in all synthesized materials and reduced size, indicating dislocations in the crystal lattice [3]. This equation is known from the uniform deformation model because the microstrain should be the same in all crystallographic orientations [25]. In the W-H plot, the diffraction domain is isotropic, representing a uniform deformation model for all crystallographic directions [26].…”

Section: Resultsmentioning

confidence: 99%

THE EFFECT OF ADDITIONAL IRON SAND ON THE CRYSTAL SIZE AND STRAIN OF ZnO

Lorna

Mutmainna

Tahir

et al. 2022

IPR

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This study observed the effect of the addition of iron (Fe) doping on the characteristics of Zinc Oxide (ZnO) nanoparticles.Zn(1-x)Fe(x) with various concentration of x = 0, 2, 4, 6, 8, and 10% was prepared by coprecipitation method using Sodium Hydroxide and Hydrogen Chloride. The effect of adding Fe doping on ZnO was characterized using X-ray Diffraction (XRD) to determine the crystal structure, size, and strain. The analysis result confirmed the absence of additional impurity peaks in the ZnO nanoparticles. Fe doping affects the Zn lattice structure. X-ray diffraction (XRD) study confirms the crystalline Hexagonal structure. Crystal size analysis using Debye Scherrer, UDM, and Halder-Wagner method obtained varying crystal sizes with variations in the concentration of Fe ranging from 19.89-44.72 nm. The crystal size and strain obtained from the Debye Scherrer method are smaller

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“…CR is considered the most harmful and used dye in the world; its degradation can generate amine, benzidine and other potentially carcinogenic species [21][22][23]. In humans, CR can cause general weakness, gastrointestinal irritation, anorexia, mutation, lung and bladder cancers [24][25][26][27][28]. CV and CR dyes have a complex structure, are highly stable to light and heat and are difficult to degrade biologically [29,30].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Crystal Violet and Congo Red Dyes on Heat-Treated Brazilian Palygorskite: Kinetic, Isothermal and Thermodynamic Studies

et al. 2021

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The effect of heat treatment on the adsorptive capacity of a Brazilian palygorskite to remove the dyes crystal violet (CV) and congo red (CR) was investigated. The natural palygorskite was calcined at different temperatures (300, 500 and 700 °C) for 4 h. Changes in the palygorskite structure were evaluated using X-ray diffraction, X-ray fluorescence, thermogravimetric and differential thermal analysis, N2 adsorption/desorption and Fourier transform infrared spectroscopy. The adsorption efficiency of CV and CR was investigated through the effect of initial concentration, contact time, temperature, pH and dosage of adsorbent. The calcination increased the adsorption capacity of palygorskite, and the greatest adsorption capacity of CV and CR dyes occurred in the sample calcined at 700 °C (Pal-700T). The natural and calcined samples at 300 and 500 °C followed the Freundlich isothermal model, while the Pal-700T followed the Langmuir isothermal model. Adsorption kinetics results were well described by the Elovich model. Pal-700T showed better adsorption performance at basic pH, with removal greater than 98%, for both dyes. Pal-700T proved to be a great candidate for removing cationic and anionic dyes present in water.

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Novel green strategy for CuO–ZnO–C nanocomposites fabrication using marigold (Tagetes spp.) flower petals extract with and without CTAB treatment for adsorption of Cr(VI) and Congo red dye

Cited by 54 publications

References 56 publications

Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

THE EFFECT OF ADDITIONAL IRON SAND ON THE CRYSTAL SIZE AND STRAIN OF ZnO

Adsorption Behavior of Crystal Violet and Congo Red Dyes on Heat-Treated Brazilian Palygorskite: Kinetic, Isothermal and Thermodynamic Studies

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