Phyto-mediated synthesis of silver-doped zinc oxide nanoparticles from Plectranthus barbatus leaf extract: optical, morphological, and antibacterial properties

Alnehia, Adnan; Al-Sharabi, Annas; Al-Hammadi, A. H.; Al-Odayni, Abdel-Basit; Alramadhan, Safiah A.; Alodeni, Riad M.

doi:10.1007/s13399-023-03907-5

Cited by 18 publications

(5 citation statements)

References 56 publications

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“…The energy gap (E g ) was calculated by using the following equation 20 , 28 – 30 : where C 1 is a constant, h is the Planck constant and α is the optical absorption coefficient. The energy gap of pure α-Al 2 O 3 was 5.28 eV as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of copper oxide (CuO) and vanadium oxide (V2O5) addition on the structural, optical and electrical properties of corundum (α-Al2O3)

Al-Mushaki,

Al-Ariki,

Alnehia

2023

Sci Rep

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In this work, we prepared a pure α-Al2O3, α-Al2O3/CuO (AC) and α-Al2O3/V2O5 (AV) nanocomposite. The sol–gel method was used to prepare pure α-Al2O3, (AC) and (AV) samples at 1200 °C. Structural, electrical, and optical properties of the prepared samples were investigated using the X-ray diffraction (XRD), UV–Visible spectrophotometer, and conductivity meter, respectively. The XRD results confirmed the crystalline nature and the presence of the hexagonal structure of α-Al2O3, the rhombohedra structure of CuAlO2 and the tetragonal structure of V2O5. Moreover, the crystallite size of pure α-Al2O3 was 43.1 nm, while the crystallite size of α-Al2O3 in samples AC and AV nanocompsite was 24.05 nm and 34.84 nm respectively. The optical measurements showed that the band gap α-Al2O3 decreased significantly from 5.28 eV for pure to 3.7 and 3.4 eV to AC and AV respectively. The DC electrical conductivity (σd.c) values were measured for all prepared samples at room temperature. The electrical conductivity was 2.4 × 10–7 and 1.8 × 10–7 (Ω cm)−1 in AC and AV nanocompsite respectively, while ionic conductivity (σion) decreased from 3 × 10–10 in pure α-Al2O3 to 7 × 10–5 and 1 × 10–5 in AC and AV nanocompsite, respectively. The results showed an improvement in the structural, optical, and electrical properties, which may make these materials a candidate for use in many applications, such as photocatalytic, gas sensors, optoelectronics, microelectronics, semiconductor devices, ……etc.

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Section: Resultsmentioning

confidence: 99%

Effect of copper oxide (CuO) and vanadium oxide (V2O5) addition on the structural, optical and electrical properties of corundum (α-Al2O3)

Al-Mushaki,

Al-Ariki,

Alnehia

2023

Sci Rep

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“…Te variation between the antibacterial efects of the bacteria strains can be interpreted via the composition of chemical and diverse structure of every cell surface. Te high antibacterial activities are because of the increased ability of the fabricated NPs to generate reactive oxygen species (ROS) [4,[47][48][49][50].…”

Section: Antibacterial Activitymentioning

confidence: 99%

“…Green synthesis of metal sulfde nanoparticles (NPs) is a growing feld of nanoscience and nanotechnology. Te nanomaterial's size and shape are key factors in its optical, morphological, spectral, structural, and antibacterial properties [1][2][3][4][5]. Zinc sulfde nanoparticles (ZnS NPs) are one of the signifcant semiconductor materials due to their large bandgap (3.68 eV) and wide exciton binding energy (38 meV) at room temperature (RT) [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical, and Bioactivity Properties of Silver-Doped Zinc Sulfide Nanoparticles Synthesized Using Plectranthus barbatus Leaf Extract

Alnehia

Al-Sharabi

Al-Hammadi

et al. 2023

Journal of Chemistry

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Aqueous leaf extract of Plectranthus barbatus was used, for the first time, for preparation of (2, 6 mol%) silver (Ag)-doped zinc sulfide nanoparticles (ZnS NPs), acting as a stabilizing and capping agent for NPs’ production. The obtained metal oxides were characterized by FTIR, UV-visible, XRD, and SEM methods. The results revealed that 0.02 and 0.06% Ag-doped ZnS had optical bandgaps of 3.20 and 3.03 eV. The XRD evinced the crystalline nature, while the FTIR confirmed the doped structure of the prepared oxides. The bioactivity investigations revealed that the biosynthesized Ag-doped ZnS NPs are more active against S. aureus than E. coli. Furthermore, the hemolytic tests indicated no potential harm to red blood cells if utilized at a low dose. Such enhanced optical and biological properties of Ag-doped ZnS may promote its prospective use in electronics and as an antibacterial agent.

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“…Te antibacterial efect of the prepared materials was executed for S. aureus (Gram-positive) and E.coli (Gram-negative) bacteria by the disc difusion route [41,42]. Te concentrations of 70, 140, and 210 mg/mL of the synthesized NPs were taken for the antibacterial check.…”

Section: Antibacterial Testmentioning

confidence: 99%

Plectranthus barbatus Leaf Extract-Mediated Synthesis of ZnS and Mg-Doped ZnS NPs: Structural, Optical, Morphological, and Antibacterial Studies

Al-Hammadi,

Alnehia,

Al-Sharabi

et al. 2023

Nanomaterials and Nanotechnology

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In the current study, the researchers have explored the influence of doped Mg ions on the optical, morphological, and structural properties of zinc sulfide (ZnS) nanoparticles (NPs). The green technique was employed to prepare pure and 2% and 5% Mg-doped ZnS NPs using the Plectranthus barbatus leaf extract as a capping agent. XRD, SEM, FTIR, and UV-visible were used in the investigation process. The XRD results showed that all the synthesized materials have a cubic structure with space group F-43m. The Dav was nearly in the range of 2.02–2.20 nm. The SEM images illustrated that NPs were agglomerated. The UV-visible results showed that the optical bandgap increased as Mg2+ ions increased, which was in the range of 3.81–4.42 eV. The absorption shoulder of the prepared NPs is blue-shifted with increasing dopant concentration. The FTIR spectrum gives characteristic peaks for Zn-S bonds and asserts NPs’ formation. The antibacterial check against E. coli and S. aureus bacterial strains revealed that pure and Mg-doped ZnS NPs have higher activity for both bacterial strains. The results have shown that the prepared materials can be used for antibacterial activities and optoelectronic applications.

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Phyto-mediated synthesis of silver-doped zinc oxide nanoparticles from Plectranthus barbatus leaf extract: optical, morphological, and antibacterial properties

Cited by 18 publications

References 56 publications

Effect of copper oxide (CuO) and vanadium oxide (V2O5) addition on the structural, optical and electrical properties of corundum (α-Al2O3)

Effect of copper oxide (CuO) and vanadium oxide (V2O5) addition on the structural, optical and electrical properties of corundum (α-Al2O3)

Structural, Optical, and Bioactivity Properties of Silver-Doped Zinc Sulfide Nanoparticles Synthesized Using Plectranthus barbatus Leaf Extract

Plectranthus barbatus Leaf Extract-Mediated Synthesis of ZnS and Mg-Doped ZnS NPs: Structural, Optical, Morphological, and Antibacterial Studies

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