Degradation of dyes using biologically synthesized zinc oxide nanoparticles

Mirgane, Nitin A.; Shivankar, Vitthal S.; Kotwal, Sandip B.; Wadhawa, Gurumeet C.; Sonawale, Maryappa C.

doi:10.1016/j.matpr.2020.06.037

Cited by 41 publications

(18 citation statements)

References 40 publications

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“…As observed from that figure, there is no significant loss in the photocatalytic activity after 5 cycles of reusing for ZnO (4L, 400 °C) as strong evidence for the high stability for reusing of the nanostructured ZnO thin films as photocatalysts. Table 6 shows the photocatalytic parameters of ZnO films as in the present work and also of ZnO nanoparticles from different previous researches [10,[46][47][48][49][50][51][52]. As shown in Table 6, ZnO film in the present work has the highest value of the photodegradation efficiency (97.11%) for the RO96 in the shortest period of irradiation time about 40 min with the highest rate of degradation 0.1012 min −1 compared with the previous works.…”

Section: Photocatalytic Activity Of Nanostructured Zno Thin Filmsmentioning

confidence: 51%

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

2022

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Thin films of ZnO, with distinct thicknesses, were deposited on soda-lime glass substrates by sol–gel spin-coating as a cost-effective method without any evacuation facilities. The nanocrystalline structure of the deposited films was indexed by the atomic force microscope and X-ray diffraction techniques. The average grain size increases with the increase of the film thickness and annealing temperature. The energy-dispersive X-ray technique has been used to check the atomic ratios of Zn and O with the film thickness and heat treatment for homogeneous ZnO films. ZnO films show elevated transmission in the visible spectrum as a transparent semiconductor material. Optical constants, like absorption coefficient, optical band gap, and refractive index, were obtained by the Swanepoel method. All thin film samples were applied for photodegradation of reactive orange 96 (RO96) to evaluate the effect of thickness and annealing temperature on the ZnO film’s photocatalytic activity. ZnO 4L (400 °C, 3 h) film possesses the highest rate of photodegradation about 0.1 min−1 for RO96 with high stability and reusability.

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Section: Photocatalytic Activity Of Nanostructured Zno Thin Filmsmentioning

confidence: 51%

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

2022

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“…The ZnO nanoparticles (NPs) are extensively used in various fields such as electronics, optics, biomedicine and agriculture (Patel et al, 2016); furthermore, it is utilized in photodetectors, gas sensors, piezoelectric, lasers and photocatalysis (Sadollahkhani et al, 2014). In the literature, numerous methods have been depicted to prepare several types of morphologically different ZnO nanostructures such as the solvothermal method (Bai et al, 2015), hydrothermal methods (Kumaresan et al, 2017), microwave‐assisted method (Nandi et al, 2018), co‐precipitation method (Adam et al, 2018), sol–gel method (Ahmed et al, 2019; Balcha et al, 2016; Nagaraju et al, 2020), combustion method (Ahmad, 2019), microwave solvothermal method (Wojnarowicz et al, 2018) and green method (Mirgane et al, 2020; Prasad et al, 2019; Rambabu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of ZnO nanoparticles for the effective photodegradation of malachite green dye in aqueous solution

Meena

Poswal

Surela

2022

Water & Environment J

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Zinc oxide (ZnO) nanoparticles were synthesized using a simple co‐precipitation method and applied for effective photodegradation of malachite green (MG) dye in an aqueous solution. The synthesized ZnO nanoparticles were characterized by X‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), Fourier transform infrared (FTIR), and ultraviolet–visible (UV–vis) spectroscopic techniques. XRD pattern is confirmed the formation of crystalline ZnO nanoparticles with hexagonal wurtzite structure while the FESEM image validates the preparation of disc‐like spherical nanostructures agglomerated with the size of 30–50 nm. The nanostructures exhibited a strong UV absorption band at 370 nm, and the bandgap energy calculated from the Tauc plot is 3.12 eV. The prepared ZnO nanoparticles exhibited 92.07% photodegradation efficiency against the MG dye in 2 h of UV light irradiation at pH 8. The experimental data has followed the pseudo‐first‐order kinetic model, and the rate constant value obtained is 20.433 × 10−3 min−1. Thus, the synthesized ZnO nanoparticles degraded MG dye effectively and can be utilized for environmental remediation purposes.

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“…Few examples of green resources used for the preparation of ZONPs include Linum usitatissimum (Alkasir et al 2020), Moringa oleifera (Letsholathebe et al 2020), Salvadora persica (Alharthi et al 2020), Ilex paraguariensis (Bandeira et al 2020), Sambucus spp. (Alamdari et al 2020) Abelmoschus esculentus (Mirgane et al 2020), Peltophorum pterocarpum (Pai et al 2019a), Cyanometra ramiflora (Varadavenkatesan et al 2019) and Calliandra haematocephala (Vinayagam et al 2020b).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of photocatalytic zinc oxide nanoflowers using Peltophorum pterocarpum pod extract and their characterization

et al. 2021

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Zinc oxide nanoflowers (ZnONFs) were prepared by employing the pod extract of Peltophorum pterocarpum as a green resource and characterized by various methods. UV–vis spectrum displayed a peak at 361 nm which confirmed the formation of ZnO nanoparticles. The optical band gap was calculated as 3.43 eV. FE-SEM images exposed the flower-like morphology and EDX portrayed strong signals for Zn and O. XRD studies substantiated signature peaks for the wurtzite phase of ZnONFs and the lattice parameters matched well with the literature. Mesoporous nature was confirmed by BET analysis which yielded a high specific surface area of 19.61 m2/g. FTIR bands at 420.48 and 462.92 cm−1affirmed the Zn and O bonding vibrations. The photocatalytic potential of the ZnONFs was successfully examined for the removal of methylene blue dye under natural solar light. The experimental data were fitted to Langmuir–Hinshelwood’s first-order equation and the kinetic constant was calculated as 0.0114 min–1.

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Degradation of dyes using biologically synthesized zinc oxide nanoparticles

Cited by 41 publications

References 40 publications

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

Facile synthesis of ZnO nanoparticles for the effective photodegradation of malachite green dye in aqueous solution

Synthesis of photocatalytic zinc oxide nanoflowers using Peltophorum pterocarpum pod extract and their characterization

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