Rapid synthesis of ZnO nanowires and nanoplates with highly enhanced photocatalytic performance

Choudhary, Shipra; Sahu, Kavita; Bisht, Aditi; Satpati, Biswarup; Mohapatra, Satyabrata

doi:10.1016/j.apsusc.2020.148484

Cited by 37 publications

(11 citation statements)

References 74 publications

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“…These include simple spherical particles, three-dimensional particles with more complex shapes, nanorods and nanowires. The latter can have aspect ratios greater than 10 or even greater than 100 [14][15][16][17][18][19][20][21][22][23]. The vast majority of ZnO nanoparticles have more spherical shapes since such a morphology represents the minimum surface energy and is the most thermodynamically favourable.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

et al. 2021

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An overview of recent work on the low-temperature plasma-assisted synthesis of zinc oxide (ZnO) nanoparticles is presented and interpreted in terms of gas-phase and surface reactions with illustrated examples. The thermodynamical nonequilibrium conditions allow the formation of chemically reactive species with a potential energy of several eV, which readily interact with the Zn precursors and initiate reactions leading to the formation of nanoparticles or nanowires. The high-quality nanowires were synthesized from Zn powders only upon interaction with moderately ionized plasma in a narrow range of plasma parameters. This technique is promising for the synthesis of large quantities of nanowires with aspect ratios well above 10, but the exact range of parameters remains to be determined. Apart from the ex situ techniques, the ZnO nanoparticles can be synthesized by depositing a film of precursors (often Zn salts or Zn-containing organometallic compounds) and exposing them to oxygen plasma. This technique is useful for the synthesis of well-adherent ZnO nanoparticles on heat-sensitive objects but requires further scientific validation as it often leads to the formation of a semicontinuous ZnO film rather than nanoparticles. Both low-pressure and atmospheric plasmas are useful in converting the precursor film into ZnO nanoparticles despite completely different mechanisms.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

et al. 2021

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“…Clearly, it can be observed that the lattice fringe spacing is 0.260 nm, which corresponds to the (100) plane of ZnO nanocrystals. 46,47 Besides, EDS showed that O, Zn, and C elements (corresponding mass fraction: 25.61%, 60.60%, 13.79%) were uniformly dispersed on the surface of ZnO/N,S-CQDs (Fig. 1(f-j)).…”

Section: Resultsmentioning

confidence: 96%

Photocatalytic activity study of ZnO modified with nitrogen–sulfur co-doped carbon quantum dots under visible light

Liu

et al. 2022

New J. Chem.

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“…For the pure ZnO sample, the

−

mode was observed at approximately 333 cm −1 , and the dopant insertion caused a shift for 331 cm −1 . This vibrational mode is associated with the second-order vibration of modes arising to

from

the scattering process [ 51 ]. Conversely, the

mode was observed at approximately 377 cm −1 for the ZnO sample and shifted to 380 cm −1 for the Er-doped ZnO sample.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Er-Doped ZnO Nanoparticles: An Investigation on the Methylene Blue, Eosin, and Ibuprofen Removal by Photodegradation

Silva,

Castro-Lopes,

Jerônimo

et al. 2024

Molecules

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We present a study on the green synthesis of undoped and Er-doped ZnO compounds using Mangifera indica gum (MI). A set of tests were conducted to assess the structure of the material. The tests included X-ray diffraction, Raman, and Fourier-transform infrared spectroscopy. Optical properties were studied using diffuse reflectance and photoluminescence. Morphological and textural investigations were done using SEM images and N2 adsorption/desorption. Furthermore, photocatalytic tests were performed with methylene blue (MB), yellow eosin (EY), and the pharmaceutical drug ibuprofen (IBU) under UV irradiation. The study demonstrated that replacing the stabilizing agent with Mangifera indica gum is an effective method for obtaining ZnO nanoparticles. Additionally, the energy gap of the nanoparticles exhibits a slight reduction in value. Photoluminescence studies showed the presence of zinc vacancies and other defects in both samples. In the photocatalytic test, the sample containing Er3+ exhibited a degradation of 99.7% for methylene blue, 81.2% for yellow eosin, and 52.3% for ibuprofen over 120 min. In the presence of methyl alcohol, the degradation of MB and EY dyes is 16.7% and 55.7%, respectively. This suggests that hydroxyl radicals are responsible for the direct degradation of both dyes. In addition, after the second reuse, the degradation rate for MB was 94.08%, and for EY, it was 82.35%. For the third reuse, the degradation rate for MB was 97.15%, and for EY, it was 17%. These results indicate the significant potential of the new semiconductor in environmental remediation applications from an ecological synthesis.

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Rapid synthesis of ZnO nanowires and nanoplates with highly enhanced photocatalytic performance

Cited by 37 publications

References 74 publications

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

Photocatalytic activity study of ZnO modified with nitrogen–sulfur co-doped carbon quantum dots under visible light

Green Synthesis of Er-Doped ZnO Nanoparticles: An Investigation on the Methylene Blue, Eosin, and Ibuprofen Removal by Photodegradation

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