Offer a novel method for size appraise of NiO nanoparticles by PL analysis: Synthesis by sonochemical method

Musevi, Seyid Javad; Aslani, Alireza; Motahari, Hamid; Hassan, Sameer

doi:10.1016/j.jscs.2012.06.009

Cited by 47 publications

(22 citation statements)

References 19 publications

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“…As the particle size decreases, the PL intensity is also decreased. This assumption was suggested and confirmed by Musevi et al [34] when they investigated the particle size distribution and correlated it with the PL spectra. As the film's thickness grows, and the presence of the non-stoichiometric ratio is realized, the defects or vacancies increase, leading to the decreasing value of the PL intensity, as well as the transmittance spectra.…”

Section: Photoluminescence Propertiessupporting

confidence: 53%

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Growth and Correlation of the Physical and Structural Properties of Hexagonal Nanocrystalline Nickel Oxide Thin Films with Film Thickness

et al. 2019

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This study investigated nonstoichiometric nickel oxide thin films prepared via the DC-sputtering technique at different film thicknesses. The prepared films were characterized by a surface profiler for thickness measurement, X-ray diffraction (XRD) for film nature, atomic force microscopy (AFM) for film morphology and roughness, UV-visible-near infrared (UV-vis.-NIR) spectroscopy for optical transmittance spectra of the films, and the photoluminescence (PL) spectra of the prepared films were obtained. The measured film thickness increased from 150 to 503 nm as the deposition time increased. XRD detected the trigonal crystal system of NiO0.96. The crystallite sizes were mainly grown through (101) and (110) characteristic planes. NiO0.96 films have a spherical particle shape and their sizes decreases as the film thickness increased. The optical band gap values decrease from 3.817 to 3.663 eV when the film thickness increases. The refractive index was estimated from the Moss relation, while the high-frequency dielectric constant and the static dielectric constant were deduced from the empirical Adachi formula. The photoluminescence behavior of the studied films confirmed the photogeneration of an electron-hole in nickel and oxygen vacancies. Hence, this study confirms the presence of nickel oxide lattice in the hexagonal structure containing the defects originated from the nickel vacancies or the excess of oxygen.

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Section: Photoluminescence Propertiessupporting

confidence: 53%

“…The peaks at 365 and 377 nm suggest exciton-exciton scattering in the UV emission [10,33]. The peak at 468 nm is correlated with the recombination of electron-holes in the vacancies of the Ni and O lattice [10,[34][35][36]. The photoluminescence spectra are correlated with the particle size of the prepared films.…”

Section: Photoluminescence Propertiesmentioning

confidence: 92%

Growth and Correlation of the Physical and Structural Properties of Hexagonal Nanocrystalline Nickel Oxide Thin Films with Film Thickness

et al. 2019

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“…It is thought that the difference of the emission intensity likely depends on morphology variations. [35] The Mott-Schottky plots were constructed as a function of the applied DC potential. The Mott-Schottky plots of all samples were obtained using an Ag/AgCl electrode in 1 M NaSO 4 aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that the difference of the emission intensity likely depends on morphology variations. [35] Figure 11 presents the room temperature PL spectra of NiO thin films at different substrate temperatures. For all samples, a dominant near band edge (NBE) emission peak centered at 395 nm (3.14 eV) and a weak emission peak at 524 nm (2.37 eV) can be clearly seen.…”

Section: Resultsmentioning

confidence: 99%

“…The PL intensity of NiO thin films decreased as the temperature rose from room temperature to 400 • C. It is thought that the difference of the emission intensity likely depends on morphology variations. [35] Coatings 2019, 9, x FOR PEER REVIEW 9 of 11 Figure 11. Room-temperature photoluminescence (PL) spectra of NiO thin films deposited at different substrate temperatures.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Substrate Temperature on the Optical and Electrical Properties of Nitrogen-Doped NiO Thin Films

Tian

Gong

Qi³

et al. 2019

Coatings

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NiO is a widely used p-type semiconductor. The desired optical and electrical properties of NiO vary in different application fields. To modulate the properties of NiO, nitrogen (N)-doped NiO thin films were synthesized by reactive radio-frequency magnetron sputtering on ITO-coated glass substrates. The influence of substrate temperature on the properties of NiO was investigated. XRD studies indicated a cubic structure. With the increase of the substrate temperature, the average transmittance in the visible region gradually reduced from 90% to 50%. The bandgap energy narrowed from 3.5 to 3.08 eV. The intensity of the PL spectra weakened, and the electrical conductivity rose. Overall, changing the substrate temperature is an effective method to modulate the optical and electrical properties of N-doped NiO thin films.

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Synthesis of nickel sulfide and nickel–iron sulfide nanoparticles from nickel dithiocarbamate complexes and their photocatalytic activities

Thirumaran

Gurumoorthy

Arulmozhi

et al. 2020

Applied Organom Chemis

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Abstract[Ni(dtc)2] (dtc = N‐(pyrrole‐2‐ylmethyl)‐N‐thiophenemethyldithiocarbamate (1), N‐methylferrocenyl‐N‐(2‐phenylethyl)dithiocarbamate (2), N‐furfuryl‐N‐methylferrocenyldithiocarbamate (3), and (N‐[pyrrole‐2‐ylmethyl]‐N‐thiophenemethyldithiocarbamato‐S,S′)(thiocyanato‐N)(triphenylphosphine)nickel(II) (4) complexes were prepared and characterized by elemental analysis, infrared, ultraviolet–visible, and nuclear magnetic resonance (1H and 13C) spectroscopies. The data were consistent with the formation of square planar nickel(II) complexes, which was confirmed by single‐crystal X‐ray diffraction studies on 2 and 4. Fe···Fe interactions exhibited by complex 2 led to supramolecular aggregation. The structure of 4 reveals intermolecular and intramolecular C‐H···Ni anagostic interactions. The anion‐sensing properties of 2 were studied with halide ions by cyclic voltammetry. It was observed that 2 acts as sensor for bromide. Complexes 1, 2, and 3, were utilized to prepare nickel sulfide, nickel–iron sulfide‐1, and nickel–iron sulfide‐2, respectively. The composition, structure, morphology, and optical properties of nickel sulfide and nickel–iron sulfides were examined using powder X‐ray diffraction, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, ultraviolet–visible, fluorescence, and infrared spectroscopy. Powder X‐ray diffraction patterns of nickel sulfide, nickel–iron sulfide‐1, and nickel–iron sulfide‐2 indicate the formation of orthorhombic Ni9S8, cubic NiFeS2, and cubic Ni2FeS4, respectively. The photocatalytic activities of as‐prepared nickel sulfide and nickel–iron sulfide‐1 nanoparticles were investigated for photodegradation of methylene blue and rhodamine‐B under ultraviolet irradiation. Nickel–iron sulfide‐1 nanoparticles show slightly higher photodegradation efficiency compared with the nickel sulfide nanoparticles.

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Offer a novel method for size appraise of NiO nanoparticles by PL analysis: Synthesis by sonochemical method

Cited by 47 publications

References 19 publications

Growth and Correlation of the Physical and Structural Properties of Hexagonal Nanocrystalline Nickel Oxide Thin Films with Film Thickness

Growth and Correlation of the Physical and Structural Properties of Hexagonal Nanocrystalline Nickel Oxide Thin Films with Film Thickness

Effect of Substrate Temperature on the Optical and Electrical Properties of Nitrogen-Doped NiO Thin Films

Synthesis of nickel sulfide and nickel–iron sulfide nanoparticles from nickel dithiocarbamate complexes and their photocatalytic activities

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