A Facile Green Approach of Cone-like ZnO NSs Synthesized Via Jatropha gossypifolia Leaves Extract for Photocatalytic and Biological Activity

Krishnan, B. Radha; Ramesh, M.; Selvakumar, M.; Selvam, Arun Karthick; Sasikumar, A.; Geerthi, D. Varun; Senthilkumar, N.

doi:10.1007/s10904-020-01576-9

Cited by 38 publications

(14 citation statements)

References 44 publications

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“…05-0566)[11,12]. The average crystallite size (D) of the prepared materials was evaluated by Scherrer formula[13][14][15].D = 0.94λ/β cos θWhere, λ signi es the wavelength of Cu Kα radiation (1.5405Ǻ), β and θ are full width at half maximum of broadened characteristic peaks and Bragg diffraction angle, respectively. The average particle size of assynthesized MgFe 2 O 4, ZnS and MgFe 2 O 4 /ZnS NCs was determined to be 33 nm, 47 nm, and 55 nm.…”

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confidence: 99%

WITHDRAWN: A facile synthesis of MgFe2O4/ZnS heterojunction with effectively enhanced visible light photocatalytic activity for degradation of methylene blue and crystal violet dyes

Rajkumar

Seetharaman

Vijayan³

et al. 2021

Preprint

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A novel n-MgFe2O4–n-ZnS heterojunction catalyst was employed via two step approach for photodegradation of organic dyes such as methylene blue (MB) and crystal violet (CV) dyes under visible light irradiation. The synthesized MgFe2O4/ZnS NCs were characterized using PXRD, FTIR, UV-visible spectroscopy, PL and FESEM analysis which reveals the formation of flake like structure with size as to be ~50 nm. The photocatalytic experimental result demonstrates that the MgFe2O4/ZnS nanocomposites (NCs) improve photodegradation performance with 98.0% and 91% decomposition of MB and CV dyes within 120 min illumination during simulated visible light irradiation. From the result, MgFe2O4/ZnS NCs has higher photocatalytic performance than that of MgFe2O4, and ZnS due to efficient separation of the photo-induced electron-hole pairs and effective electron–hole generation transfer by the formation of n-MgFe2O4–n-ZnS heterojunction. Hence, photodegradation performance implies that the synthesized MgFe2O4/ZnS NCs can be effectively utilized in waste water purification systems.

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confidence: 99%

WITHDRAWN: A facile synthesis of MgFe2O4/ZnS heterojunction with effectively enhanced visible light photocatalytic activity for degradation of methylene blue and crystal violet dyes

Rajkumar

Seetharaman

Vijayan³

et al. 2021

Preprint

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“…The value obtained was concordant with the previously reported literature. For example, bandgap values of 3.4 eV and 3.44 eV were obtained in studies using Jatropha gossypifolia leaf extract and Cyanometra ramiflora leaf extracts (Varadavenkatesan et al 2019;Krishnan et al 2020).…”

Section: Visual Examination and Uv-vis Analysismentioning

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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“…Moreover, the plant extracts are enriched with wide ranges of phytocompounds like polyphenols and flavonoids, deemed to be bio-reducing agents with no negative effects on the environment (Shayegan Mehr et al 2018). Their use as reducing and capping agents has led to recognition as biologically benign materials for the formulation of ecofriendly and low-cost nanoparticles (Manjari et al 2019;Krishnan et al 2020). Rhodamine B (RhB) is a watersoluble dye, used as a coloring agent in many industries.…”

Section: Introductionmentioning

confidence: 99%

“…Few recent reports on the synthesis of ZnONPs include the use of various plant extracts such as Azadirachta indica (Haque et al 2020), Ilex paraguariensis (Bandeira 2020), Camellia sinensis L (Akbarian et al 2020), Acacia caesia (Manjari et al 2019), Jatropha gossypifolia (Krishnan et al 2020), Lippia adoensis (Demissie et al 2020), Justicia spicigera (Soto-Robles 1225), and Averrhoa carambola (Chakraborty et al 2020). In addition, our research group also has published leaf extract-mediated ZnONPs using Calliandra haematocephala (Vinayagam et al 2019), Cynometra ramiflora (Varadavenkatesan et al 2019), and Peltophorum pterocarpum (Pai et al 2019a).…”

Section: Introductionmentioning

confidence: 99%

Characterization and photocatalytic activity of ZnO nanoflowers synthesized using Bridelia retusa leaf extract

et al. 2021

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In the current work, the leaf extract of Bridelia retusa was used for the first time to synthesize zinc oxide nanoparticles (ZnONPs). A zinc nanoparticle-specific 364-nm peak was discerned via UV–Vis studies with a typical bandgap energy of 3.41 eV. FE-SEM micrographs revealed flower-shaped structure of the ZnONPs. EDS analysis corroborated the presence of zinc and oxygen. XRD spectrum established the wurtzite structure, sized at 11.06 nm. The mesoporous texture (4.89 nm) of the nanoparticles was deduced from BET analysis, proving a higher specific surface area than commercial ZnONPs. FTIR spectroscopy resulted in absorption bands typical for ZnONPs. Within a span of 165 min, under solar irradiation, the ZnONPs facilitated the photocatalytic degradation of Rhodamine B dye upto 94.74%. Exhibiting pseudo-first-order kinetics, the process had a degradation constant of 0.0109 min−1. It was concluded that numerous factors led to the high degradation efficiency. High values of bandgap energy and specific surface area, along with the mesoporous and crystalline nature of the ZnONPs led to the observed effect. The ZnONPs were also stabilized by the phytochemicals in the B. retusa leaves. The study is thus able to successfully demonstrate the huge potential in the field of environmental nanoremediation. The viability of using ZnONPs as solar photocatalysts for treating dye-laden industrial wastewater was thus attested.

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A Facile Green Approach of Cone-like ZnO NSs Synthesized Via Jatropha gossypifolia Leaves Extract for Photocatalytic and Biological Activity

Cited by 38 publications

References 44 publications

WITHDRAWN: A facile synthesis of MgFe2O4/ZnS heterojunction with effectively enhanced visible light photocatalytic activity for degradation of methylene blue and crystal violet dyes

WITHDRAWN: A facile synthesis of MgFe2O4/ZnS heterojunction with effectively enhanced visible light photocatalytic activity for degradation of methylene blue and crystal violet dyes

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

Characterization and photocatalytic activity of ZnO nanoflowers synthesized using Bridelia retusa leaf extract

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