Synthesis of Core/Shell (ZnO/Ag) Nanoparticles Using Calotropis gigantea and Their Applications in Photocatalytic and Antibacterial Studies

Kumar, C. Suresh; Betageri, Virupaxappa S.; Nagaraju, G.; Pujar, G. H.; Onkarappa, H.S.; Latha, M.S.

doi:10.1007/s10904-020-01507-8

Cited by 26 publications

(3 citation statements)

References 47 publications

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“…In the literature, the absorption peak of 453 cm −1 wave number corresponds to the Zn–O stretch band in the ZnO lattice. It has been reported as a characteristic peak representing the ZnO structure 33 . In our study, the absorption peak at wave numbers 635 and 488 cm −1 indicates the Zn–O stretch in the ZnO lattice.…”

Section: Resultssupporting

confidence: 51%

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Erdogan,

Eden,

Canpolat

et al. 2024

Int J Applied Ceramic Tech

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In this study, as‐prepared and Ag‐decorated ZnO/Zn(OH)2 composite nanoparticles (NPs) were obtained using the sol–gel technique. First, the effect of aging on the structural, optical, and morphological features was examined. Ag NPs can interact with the electronic structure of ZnO/Zn(OH)2 NPs, resulting in changes in their energy levels. It was found that the composite NPs obtained after 6 h solution aging increased in full width at half maximum and good crystallinity of the structures from the X‐ray diffraction (XRD) measurements. The Raman spectrum supports the experimental data obtained from XRD and Fourier transform infrared, a material containing a mixture of ZnO and Zn(OH)2. From the morphological study, Ag NPs were successfully decorated on the ZnO/Zn(OH)2 surface, and composite NPs did not change the morphological appearance of the structure. Second, the photocatalytic performance of the samples was investigated. In the experimental setting, ultra‐violet A light was employed as the irradiation source, whereas rhodamine B (RhB) was used as the dyestuff. The photo‐degradation of the RhB dyestuff on composite NPs was observed to be 98.5% and 92.5% for 6 and 2 h aged samples, respectively. On Ag NPs, the catalytic performance of the sample was increased up to 95% after 180 min.

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Section: Resultssupporting

confidence: 51%

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Erdogan,

Eden,

Canpolat

et al. 2024

Int J Applied Ceramic Tech

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“…Later, all samples were centrifuged to obtain absorption spectra of MB dye. [70][71][72][73] The rate of degradation was found to be increased with the increase of irradiation time of UV light, whereas the absorbance peak of MB dye was decreased with the increase in time in the presence of Ag 2 O photocatalyst. As can be seen from Figure 10, the absorbance of MB has intensely decreased, resulting in 85.18% of degradation in 4 h. [74]…”

Section: Photocatalytic Degradationmentioning

confidence: 97%

Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications

Vinay

Udayabhanu²,

Sumedha³

et al. 2020

Applied Organom Chemis

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Silver oxide nanoparticles (Ag2O NPs) were prepared using cantaloupe (Cucumis melo) seeds as a fuel by employing a green synthesis method. The prepared Ag2O NPs were investigated using powder X‐ray diffraction (PXRD), UV–visible spectrum, Fourier transform infrared analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM) with energy‐dispersive spectroscopy, and photoluminescence studies. PXRD data reveal the establishment of cubic crystal structure of Ag2O NPs. According to SEM and TEM results, the morphology of the prepared NPs was agglomerated and spherical. The photodegradation activity of the prepared Ag2O NPs over methylene blue dye was promising under visible light irradiation. Furthermore, the antimicrobial assay of the synthesized Ag2O NPs was carried out by the disc diffusion method against Gram‐positive and Gram‐negative microbial strains.

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“…Recent reports have revealed that the bacterial resistance against the antibiotics has become a serious health issue, posing a global risk [58]. Te lack of development of new drugs for the bacteria-caused diseases, features of multidrug-resistant bacteria, and misusing antibiotics enable the bacteria to be resistant to the drug [59][60][61]. It is estimated that by 2050, antibiotic resistance will have caused approximately 300 million deaths, with an economic loss of $100 trillion, and according to the World Health Organization (WHO) report, antibiotic resistance is one of the major health problems of the century.…”

Section: Introductionmentioning

confidence: 99%

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

Tadesse,

Ananda Murthy,

Ravikumar

et al. 2023

Bioinorganic Chemistry and Applications

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Investigating and synthesizing potent antibacterial NPs using biological methods is highly preferred, and it involves nontoxic, cost-effective, and environmentally friendly chemicals and methods. Antibiotic drug resistance and oxidative stress have become a serious public health issue worldwide. Hence, the key objective of this study was to biologically synthesize and characterize the potent antibacterial Co3O4@ZnO core-shell nanoparticles for the antibacterial application. The radical scavenging ability of green synthesized Co3O4@ZnO core-shell nanoparticles was also determined. In this study, Co3O4@ZnO core-shell nanoparticles (CZCS NPs) have been synthesized using three different core to shell materials ratios of Co3O4 to ZnO (0.5 : 0.25 CZCS (1), 0.5 : 0.5 CZCS (2), and 0.5 : 0.75 M CZCS (3)) by employing Datura stramonium leaf extract. The polycrystalline nature of Co3O4@ZnO core-shell nanoparticles was investigated using the XRD and SAED characterization techniques. The investigated nanostructure of Co3O4@ZnO core-shell nanoparticles appeared with Co3O4 as the core and ZnO as an outer shell. Additionally, a variety of physicochemical properties of the nanoparticles were determined using various characterization techniques. The average crystallite sizes of CZCS (1), CZCS (2), and CZCS (3) were found to be 24 ± 1.4 , 22 ± 1.5 , and 25 ± 1.5 nm, respectively. The band gap energy values for CZCS (1), CZCS (2), and CZCS (3) determined from the UV-DRS data were found to be 2.75, 2.76, and 2.73 eV, respectively. The high inhibition activities against S. aureus, S. pyogenes, E. coli, and P. aeruginosa bacterial strains were obtained for the small size CZCS (2) nanoparticles at the concentration of 100 mg/mL with 22 ± 0.34, 19 ± 0 . 32 , 18 ± 0.45 , and 17 ± 0 .32 mm values, respectively. The high inhibition performance of CZCS (2) nanoparticles against Gram-positive and Gram-negative bacteria which is even above the control drug ampicillin is because of its small size and synergistic effect. The percentage scavenging activity of Co3O4@ZnO core-shell nanoparticles was also studied and CZCS (2) nanoparticles showed a good scavenging capacity (86.87%) at 500 μg/mL with IC50 of 209.26 μg/mL.

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Synthesis of Core/Shell (ZnO/Ag) Nanoparticles Using Calotropis gigantea and Their Applications in Photocatalytic and Antibacterial Studies

Cited by 26 publications

References 47 publications

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

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Synthesis of Core/Shell (ZnO/Ag) Nanoparticles Using Calotropis gigantea and Their Applications in Photocatalytic and Antibacterial Studies

Cited by 26 publications

References 47 publications

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)2 nanoparticles for RhB degradation

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)2 nanoparticles for RhB degradation

Facile combustion synthesis of Ag2O nanoparticles using cantaloupe seeds and their multidisciplinary applications

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

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Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Optimizing the structural and photocatalytic performance of Ag‐decorated ZnO/Zn(OH)₂ nanoparticles for RhB degradation

Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications