Green sol–gel synthesis of CoMnCrO
            <sub>4</sub>
            spinel nanoparticles and their photocatalytic application

Moradnia, Farzaneh; Fardood, Saeid Taghavi; Ramazani, Ali; Osali, Samira; Abdolmaleki, Ilnaz

doi:10.1049/mnl.2020.0189

Cited by 73 publications

(21 citation statements)

References 41 publications

(33 reference statements)

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“…Urbanization and rapid industrialization have proven to be a blessing to human society as well as a bane. A severe adverse impact on the water resources and the disposal of a large quantity of toxic waste in water systems is now a challenging wastewater management [1][2][3][4]. In consumer goods, including paints, printing inks, paper, pulp, and plastics, various dyes have been used for many years.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

2021

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Creating a sustainable and effective approach to handling organic contaminants from industrial waste is an ongoing problem. In the present study, ZnO nanoparticles (ZnO NPs) were synthesized under a controlled ultrasound cavitation technique using the extract of Passiflora foetida fruit peels, which act as a reducing (i.e., reduction of metal salt) and stabilizing agent. The formation of monodispersed and hexagonal morphology (average size approximately 58 nm with BET surface area 30.83m2/g). The synthesized ZnO NPs were characterized by a various technique such as UV–visible spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared (FTIR), Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA) and Dynamic light scattering (DLS). Further, the XRD pattern confirmed the hexagonal wurtzite structure of synthesized ZnONPs. The ZnO NPs exhibit excellent degradation efficiency towards organic pollutant dyes, i.e., Methylene blue (MB) (93.25% removal) and Rhodamine B (91.06% removal) in 70 min, under natural sunlight with apparent rate constant 0.0337 min−1 (R2 = 0.9749) and 0.0347 min−1 (R2 = 0.9026) respectively.Zeta potential study shows the presence of a negative charge on the surface of ZnO NPs. The use of green synthesized ZnO NPs is a good choice for wastewater treatment, given their high reusability and photocatalytic efficiency, along with adaptability to green synthesis.

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Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

2021

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“…The X-ray diffraction patterns of graphite powder for various activation times are depicted in Figure 2. There are several techniques for qualitative and quantitative analysis of XRD profiles such as the Debye-Scherrer equation and Williamson-Hall [29,30]. In this work, we used Rietveld refinement and MAUD based on the correction of the least-squares.…”

Section: Resultsmentioning

confidence: 99%

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Mirabootalebi

Fakhrabadi

Babaheydari

2021

Asian J. Nanosci. Mater.

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Carbon nanotubes (CNTs) have specific physical properties that make them one of the ideal nano-materials for electronics, magnetic, and optical applications. Produced CNTs via mechanothermal method have a springy and coil-like structure, affecting their physical characteristics and distinguishes them from other carbon nanotubes. In this research study, the optical and magnetic properties of fabricated carbon nanotubes by mechanothermal method were investigated. For this purpose, carbon nanotubes were synthesized by heat treatment of ball-milled graphite powders at 1400 ˚C in the atmosphere of argon. The quality and structure of milled-graphite and the CNTs were investigated using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and Raman spectroscopy. Then, the optical and magnetic properties of the fabricated CNTs were assessed by UV-VIS spectrometer and vibrating-sample magnetometer (VSM), respectively. The results of the absorption spectra revealed that the products had not any absorption peak at the visible regime. Furthermore, magnetization curves indicate that coercivity (Hci), magnetization (Ms), and retentivity (Mr) of the CNTs were found to be 84.183 G, 20.531, and 0.73511 emu/g, respectively.

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“…The most intense peak was considered to determine the FWHM. The mean size of the nanoparticles was 22.16 nm [36][37][38].…”

Section: Resultsmentioning

confidence: 99%

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Rezaei-Aghdam

Shamel

Khodadadi-Moghaddam

et al. 2021

Asian J. Nanosci. Mater.

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This study focuses on the utilization of ZnO (as synthetic) and mango peel (natural adsorbent) to remove blue 221 dye from aqueous solutions. First, ZnO nanoparticles (NPs) were synthesized and detected using the descriptorbased techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), N2 adsorption/desorption isotherms (BET), and X-ray diffraction (XRD). Various operational parameters including adsorbent concentration, pH, adsorbent dose, contact time, and stirring speed were investigated. The obtained kinetic results demonstrated great compatibility of the pseudo-second-order model with the experimental data. The effects of thermodynamic parameters were calculated to confirm the endothermic, spontaneous and physical nature of adsorption process. Langmuir and Freundlich isotherm models were utilized to fit the obtained equilibrium data. Freundlich model was found sufficient to explain the adsorption of blue 221 dye by ZnO NPs and mango peel. The results indicated that the ZnO NPs performed better in blue 221 dye removal as compared with mango peel. The mean size of ZnO NPs was found to be 22.16 nm. The specific surface area of ZnO NPs was obtained 26.85 m 2 .g -1 and pore volume and pore-size were 0.0581 cm 3 .g -1 and 1.22 nm, respectively. The maximum adsorption capacity of blue 221 dye on ZnO NPs and mango peel was estimated as 133.33 and 476.19 mg.g -1 , respectively.

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Green sol–gel synthesis of CoMnCrO ₄ spinel nanoparticles and their photocatalytic application

Cited by 73 publications

References 41 publications

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

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Green sol–gel synthesis of CoMnCrO 4 spinel nanoparticles and their photocatalytic application

Cited by 73 publications

References 41 publications

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

Synthesis of ZnO nanoparticles using peels of Passiflora foetida and study of its activity as an efficient catalyst for the degradation of hazardous organic dye

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Green sol–gel synthesis of CoMnCrO ₄ spinel nanoparticles and their photocatalytic application