Green synthesis of zinc oxide nanoparticles using Phoenix dactylifera waste as bioreductant for effective dye degradation and antibacterial performance in wastewater treatment

Rambabu, K.; Bharath, G.; Banat, Fawzi; Show, Pau Loke

doi:10.1016/j.jhazmat.2020.123560

Cited by 345 publications

(119 citation statements)

References 68 publications

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“…Further, oxygen molecules interact with electrons in the conduction band and transform into superoxide radical anions

^{•} O_{2}^{-}

. These anions along with H + produces hydrogen peroxide anions (HO 2 • ) which along with hydrogen ion and electron gives H 2 O 2 molecules 36–39. Fig.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Zinc Oxide Nanoparticles by Justicia adhatoda Leaves and Their Antimicrobial Activity

Pachaiappan¹,

Rajendran

Ramalingam³

et al. 2021

Chem Eng & Technol

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Zinc oxide is recognized as one of the best antimicrobial agents. Zinc oxide nanoparticles were fabricated through a green approach using zinc sulfate, zinc nitrate, and zinc acetate dihydrate as precursors and an extract of Justicia adhatoda leaves as a reducing agent. The synthesized zinc oxide nanoparticles were checked for their antimicrobial activity against the bacterial strains Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and the fungal strains Aspergillus niger, Aspergillus flavus, and Aspergillus fumigates. All three zinc oxide nanoparticles were found to inhibit the growth of microbes by the release of zinc ions and production of reactive oxygen species followed by destruction of microbes. Antimicrobial results of zinc oxide nanoparticles from the three different precursors were compared.

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“…Further, oxygen molecules interact with electrons in the conduction band and transform into superoxide radical anions

^{•} O_{2}^{-}

. These anions along with H + produces hydrogen peroxide anions (HO 2 • ) which along with hydrogen ion and electron gives H 2 O 2 molecules 36–39. Fig.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Zinc Oxide Nanoparticles by Justicia adhatoda Leaves and Their Antimicrobial Activity

Pachaiappan¹,

Rajendran

Ramalingam³

et al. 2021

Chem Eng & Technol

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“…Measurements of cytotoxicity, mutagenicity and phytotoxicity changes, proposal of degradation mechanism, comparison of different UV sources [80][81][82][83][84][85] Photocatalytic oxidation Synthesizing nanoparticles, efficient under visible light or difunctional catalysts, green methods of catalyst synthesis [86][87][88][89][90][91]…”

Section: Adsorptionmentioning

confidence: 99%

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

2021

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In the last 3 years alone, over 10,000 publications have appeared on the topic of dye removal, including over 300 reviews. Thus, the topic is very relevant, although there are few articles on the practical applications on an industrial scale of the results obtained in research laboratories. Therefore, in this review, we focus on advanced oxidation methods integrated with biological methods, widely recognized as highly efficient treatments for recalcitrant wastewater, that have the best chance of industrial application. It is extremely important to know all the phenomena and mechanisms that occur during the process of removing dyestuffs and the products of their degradation from wastewater to prevent their penetration into drinking water sources. Therefore, particular attention is paid to understanding the mechanisms of both chemical and biological degradation of dyes, and the kinetics of these processes, which are important from a design point of view, as well as the performance and implementation of these operations on a larger scale.

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“…Moreover, ZnO NPs have tremendous potential in biological applications including biological sensing, biological labeling, gene delivery, drug delivery, environmental safety, and nanomedicines [17][18][19][20][21][22][23][24][25][26].…”

Section: Of 21mentioning

confidence: 99%

“…Hence, nanosized semiconductors can act as effective photocatalysts for the degradation of various environmental pollutants (e.g., pesticides, detergents, dyes, and volatile organic compounds) in the presence of UV light and Sunlight irradiation [2,14,23,31]. To date, several methods, such as bio-treatment, incineration, ozonation, and adsorption processes based on solid adsorbents, have been utilized to treat wastewater containing pigments or dyes [15,24,32].…”

Section: Of 21mentioning

confidence: 99%

“…The peak in the region between 500-600 cm −1 is allotted to Zn-O stretching vibration of hexagonal ZnO NPs [15,44,64]. ZnO NPs/HIL and ZnO NPs/HIF show miniature peaks in the ranges of 3300-3750 cm −1 and 1500-1650 cm −1 corresponding to the N-H stretch of the amine group and symmetric stretching of the carbonyl side groups in the amino acid residues of the protein molecules, respectively [21,23]. The discrete peak obtained in the range of 547-555 cm −1 strongly depicted the presence of the C-N stretch amine group and C-Br stretch alkyl halide, respectively [65].…”

Section: Ftir Spectroscopic Analysis Of Green Synthesized Zno Npsmentioning

confidence: 99%

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Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

Wijesinghe¹,

Thiripuranathar²,

Menaa

et al. 2021

Catalysts

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In recent years, biosynthesized zinc oxide nanoparticles (ZnO NPs) have been gaining importance due to their unique properties and tremendous applications. This study aimed to fabricate ZnO NPs by using extracts from various parts of the traditional medicinal plant Heliotropium indicum (H. indicum) and evaluate their photocatalytic activity. Further, their potential in photoluminescence and fluorescence resonance energy transfer (FRET) was assessed. The Ultraviolet-Visible spectrum exhibited a hypsochromic shifted absorption band between 350–380 nm. Transmission electron microscopy (TEM) analysis revealed spherical NPs, while X-ray diffraction (XRD) data revealed wurtzite, hexagonal and crystalline nature. The TEM and XRD consistently determined an average particle size range from 19 to 53 nm. The photocatalytic degradation reaches a maximum of 95% for biogenic ZnO NPs by monitoring spectrophotometrically the degradation of methylene blue dye (λmax = 662.8 nm) under solar irradiation. Photoluminescence analysis revealed differentiated spectra with high-intensity emission peaks for biogenic ZnO NPs compared with chemically synthesized ZnO NPs. Eventually, the highest efficiency of FRET (80%) was found in ZnO NPs synthesized from the leaves. This remains the first report highlighting the multifunctional ZnO NPs capabilities mediated by using H. indicum, which could lead to important potential environmental and biomedical applications.

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Green synthesis of zinc oxide nanoparticles using Phoenix dactylifera waste as bioreductant for effective dye degradation and antibacterial performance in wastewater treatment

Cited by 345 publications

References 68 publications

Green Synthesis of Zinc Oxide Nanoparticles by Justicia adhatoda Leaves and Their Antimicrobial Activity

Green Synthesis of Zinc Oxide Nanoparticles by Justicia adhatoda Leaves and Their Antimicrobial Activity

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

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