Facile Synthesis of Silver-Doped Zinc Oxide Nanostructures as Efficient Scaffolds for Detection of p-Nitrophenol

In this paper, silver-doped zinc oxide nanoparticles were synthesized by using a solution combustion technique, in which zinc nitrate is used as an oxidizer and tartaric acid as a fuel. The phase composition, morphology and structural properties of the as-synthesized zinc oxide and silver-doped zinc oxide were established by using powdered X-ray diffraction, field emission scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy studies. Due to well-defined morphologies and crystallinity, the pure zinc oxide and silver-doped zinc oxide nanostructures can be used as efficient chemical sensors for the detection of p-nitrophenol (PNP). ZnO was found to show a low value of the limit of detection (LOD), i.e., 2.175 µM/L, for p-nitrophenol sensing; moreover, a sharp decrease in the limit of detection was observed with an increase in the concentration of silver ions, and the LOD value decreased to 0.669 µM/L for 10 mol % silver-doped zinc oxide. It is therefore concluded that Ag-doped ZnO shows a lower limit of detection as compared to pure ZnO for p-nitrophenol sensing.

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Synthesis and Spectral Analysis of PVP Capped Zinc Oxide Nanostructures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1086.75 ◽

2015 ◽

Vol 1086 ◽

pp. 75-78

Author(s):

R. Kiruba ◽

Solomon Jeevaraj A. Kingson

Keyword(s):

Zinc Oxide ◽

Chemical Precipitation ◽

Hexagonal Structure ◽

Spectroscopic Techniques ◽

Photoluminescence Spectra ◽

Zinc Oxide Nanostructures ◽

X Ray Diffraction ◽

X Ray ◽

Oxide Nanostructures ◽

Prepared Nanostructures

Monodispersed polyvinylpyrrolidone capped nanostructures of zinc oxide are prepared through chemical precipitation technique. The prepared nanostructures are characterized by XRD, SEM and Photoluminescence spectroscopic techniques. X-ray diffraction studies confirm the hexagonal structure of zinc oxide nanostructures. Nanostructures of the prepared zinc oxide are confirmed by SEM. The emission wavelength of PVP capped zinc oxide is found to be 551 nm using photoluminescence spectra.

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Bio-mediated synthesis of ZnO nanostructures from Thymus Schimperi leaves extract and its antibacterial and photocatalytic activities

Letters in Applied NanoBioScience ◽

10.33263/lianbs91.808813 ◽

2020 ◽

Vol 9 (1) ◽

pp. 808-813

Keyword(s):

Zinc Oxide ◽

Fourier Transform ◽

Fourier Transform Infrared ◽

Scanning Electron Micrographs ◽

Zinc Oxide Nanostructures ◽

X Ray Diffraction ◽

X Ray ◽

Oxide Nanostructures ◽

Photocatalytic Activities ◽

Scanning Electron

In this work, zinc oxide nanostructures were synthesized from thymus schimperi leaves extract and ZnSO4.7H2O precursor, and antibacterial and photocatalytic activities were studied. The as-synthesized nanostructures were characterized by UV-Vis spectrophotometer, powder X-ray diffraction, Fourier transform infrared spectrophotometer and scanning electron microscopy. Powder X-ray diffraction patterns revealed that the as-synthesized zinc oxide was hexagonal wurtzite structure with no peaks from other phases or impurity. The maximum UV-Vis spectrum peak at about 255 nm also supports the evidence for the formation of zinc oxide nanostructures. The presence of functional groups on the surface of the nanostructures from the Fourier transform infrared spectrum exhibited that the phytochemicals play a key role in the formation of the nanostructures. The appearance of peak at 595cm-1 in the spectrum further corroborates the presence of zinc oxide in the sample. Scanning electron micrographs depict that there was mesh like nanostructures on the surface, which are likely to be convenient for catalytic application. The synthesized nanostructures inhibited the growth of both gram-positive and gram-negative bacteria, showing its biocidal property. Moreover, Congo red, which is one of the carcinogenic textile dyes, has been photodegraded by 83.33% at a pH of 6.5 due to the as-synthesized zinc oxide nanostructures indicating its potential application for waste water treatment.

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NANOSTRUCTURAL ZnO FABRICATED BY VAPOR-PHASE TRANSPORT IN AIR

International Journal of Modern Physics B ◽

10.1142/s0217979204023829 ◽

2004 ◽

Vol 18 (02) ◽

pp. 225-232 ◽

Cited By ~ 4

Author(s):

C. X. XU ◽

X. W. SUN ◽

B. J. CHEN ◽

C. Q. SUN ◽

B. K. TAY

Keyword(s):

Zinc Oxide ◽

Growth Time ◽

Zinc Oxide Nanostructures ◽

X Ray Diffraction ◽

Vapor Phase Transport ◽

X Ray ◽

Zno Nanostructure ◽

Oxide Nanostructures ◽

Vapor Liquid Solid Mechanism ◽

Phase Transport

Nanostructural zinc oxide has been successfully fabricated by heating the mixture of ZnO and graphite powders in air. The growth of these zinc oxide nanostructures with respect to the growing time and temperature has been studied. The morphologies and the crystal structures have been characterized by scanning electronic microscopy and the X-ray diffraction. The results indicated that ZnO nanostructure formed mainly along the crystal orientation [002] on silicon substrate at moderate temperatures. The crystallization was improved by prolonging growth time and the morphologies mainly depended on the distribution of the growth temperature. The growth process was attributed to vapor-liquid-solid mechanism.

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Manganese-Doped Zinc Oxide Nanostructures as Potential Scaffold for Photocatalytic and Fluorescence Sensing Applications

Chemosensors ◽

10.3390/chemosensors8040120 ◽

2020 ◽

Vol 8 (4) ◽

pp. 120

Author(s):

Deepika Thakur ◽

Anshu Sharma ◽

Abhishek Awasthi ◽

Dharmender Singh Rana ◽

Dilbag Singh ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanostructures ◽

Zinc Oxide Nanostructures ◽

Fluorescence Sensing ◽

X Ray ◽

Sensing Applications ◽

Oxide Nanostructures ◽

Vis Spectroscopy ◽

Doped Zno ◽

Mn Doped

Herein, we report the photocatalytic and fluorescence sensing applications of manganese-doped zinc oxide nanostructures synthesized by a solution combustion technique, using zinc nitrate as an oxidizer and urea as a fuel. The synthesized Mn-doped ZnO nanostructures have been analyzed in terms of their surface morphology, phase composition, elemental analysis, and optical properties with the help of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and UV-Visible (UV-Vis) spectroscopy. A careful observation of the SEM micrograph reveals that the synthesized material was porous and grown in very high density. Due to a well-defined porous structure, the Mn-doped ZnO nanostructures can be used for the detection of ciprofloxacin, which was found to exhibit a significantly low limit of detection (LOD) value i.e., 10.05 µM. The synthesized Mn-doped ZnO nanostructures have been further analyzed for interfering studies, which reveals that the synthesized sensor material possesses very good selectivity toward ciprofloxacin, as it detects selectively even in the presence of other molecules. The synthesized Mn-doped ZnO nanostructures have been further analyzed for the photodegradation of methyl orange (MO) dye. The experimental results reveal that Mn-doped ZnO behaves as an efficient photocatalyst. The 85% degradation of MO has been achieved in 75 min using 0.15 g of Mn-doped ZnO nanostructures. The observed results clearly confirmed that the synthesized Mn-dopedZnO nanostructures are a potential scaffold for the fabrication of sensitive and robust chemical sensors as well as an efficient photocatalyst.

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