Effect of nickel doping on structural, optical and electrical properties of TiO2 nanoparticles by sol–gel method

Karthik, K.; Pandian, S. Kesava; Jaya, N. Victor

doi:10.1016/j.apsusc.2010.04.096

Cited by 101 publications

(36 citation statements)

References 30 publications

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“…Bending vibrations related to the hydroxyl functional group (H-O-H) appear between 1700 and 1300 cm −1 . A large hump around 1100 cm −1 corresponds to Ti-O-Ti bonding [43]. The presence of all above functional groups is associated with the organic solvents utilized in this experiment during sol-gel synthesis of followed by washing with water and alcohols.…”

Section: Resultsmentioning

confidence: 99%

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

et al. 2018

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In this research, the effects of transition metal (Ni) doping to metal-oxide nanoparticles (TiO 2 ) were studied. Various weight ratios (5, 10, 15, and 20%) of Ni-to-TiO 2 nanoparticles were synthesized using the sol-gel technique. These doped nanoparticles were prepared using titanium butoxide and nickel nitrate as precursors and methanol as a solvent. The effects of Ni doping to TiO 2 were examined using a variety of characterization techniques, X-ray diffraction (XRD), Fourier-transform-infrared (FTIR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, field-emission scanning electron microscopy (FESEM), and vibrating sample magnetometer (VSM). The XRD reveals that the Ni-doped TiO 2 crystallizes in a tetragonal structure with anatase phase. The particle size and lattice strain were calculated by Williamson-Hall equation. The presence of strong chemical bonding and functional groups at the interface of TiO 2 nanoparticles was confirmed by FTIR. The optical properties of undoped and doped samples were recorded by UV-Vis spectroscopy. The saturation magnetization (M s ) was found higher for undoped as compared to doped samples. The surface morphology and the element structure of the Ni-doped TiO 2 nanoparticles were examined by FESEM.

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Section: Resultsmentioning

confidence: 99%

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

et al. 2018

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“…The average crystallite size of the samples and the deviation, which is the standard deviation between the sizes estimated along the three different crystallographic directions, are given in Table 1. As compared to pure SnO 2 , broadening of diffraction peaks and degradation of crystallinity can be observed with increase in cobalt content, which implies the reduction in crystallite size [10,[21][22][23][24]. Table 1 shows the lattice parameters of pure and Co-doped SnO 2 nanoparticles.…”

Section: Characterization and Measurementsmentioning

confidence: 94%

Structural, optical, photocatalytic, and antimicrobial activities of cobalt-doped tin oxide nanoparticles

Chandran

Nair

Balachandran

et al. 2015

J Sol-Gel Sci Technol

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In this study, pure and Co-doped tin oxide (SnO 2 ) nanoparticles were synthesized by sol-gel method, and the effect of Co-doping on the structural, optical, photocatalytic, and antimicrobial activities was studied. The prepared samples were characterized by X-ray diffraction (XRD), highresolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, UV-visible diffuse reflectance spectroscopy, and N 2 adsorption/desorption analysis. The XRD patterns of all the samples are identified as tetragonal rutile-type SnO 2 phase which is further confirmed by TEM analysis. The optical spectra showed redshift in the absorption edge of doped samples, which enhances their absorption toward the visible light region. The photocatalytic activity of all the samples was assessed by monitoring the degradation of methylene blue solution under daylight illumination, and it was found that the photocatalytic activity significantly increases with the increase in dopant concentration, which is due to the effective charge separation of photogenerated electron-hole pairs. The antimicrobial studies investigated against standard bacterial and fungal strains showed enhanced antimicrobial activity in doped samples, which can be attributed to the production of reactive oxygen species and large surface area of the nanoparticles. Graphical abstract

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“…With the insertion of a TiO 2 layer, the NKBT-Sc-b and NKBT-Sc-c lms are (100) oriented, and in the meantime, the full width at half maximum (FWHM) of the (100) diffraction peak decreases, indicating a rise of crystallization degree. Because of close "in-plane" lattice parameters (0.352 nm) of anatase TiO 2 with a-axis lattice parameters (0.381 nm) of NKBT, [28][29][30] TiO 2 can provide nucleation sites to assist the (100)-oriented growth of the lms, since lower interface energy promotes nucleation of grains. This can mostly be contributed to the formation of (100)-preferred orientation and better crystallinity of the lms.…”

Section: Resultsmentioning

confidence: 99%

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films

Wang

et al. 2017

RSC Adv.

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Highly (100)-oriented (Na 0.85 K 0.15 ) 0.5 Bi 0.5 Ti 0.75 Sc 0.25 O 3 (NKBT-Sc) films with thicknesses ranging from about 460 to 860 nm were grown by utilizing TiO 2 layers engineering. Effects of TiO 2 layers on dielectric properties and energy-storage performances of NKBT-Sc films were investigated in a wide temperature range and a wide frequency range. The TiO 2 layers inserted alternately inside the NKBT-Sc films can enhance the (100) preferred degree of the film and it doesn't decrease with an increase in film thickness.Compared with NKBT-Sc films without TiO 2 layers, the TiO 2 -coated NKBT-Sc films exhibit a great enhancement in electrical properties and energy-storage performance. The best dielectric properties with the largest dielectric constant (3 r ) of about 782 and the lowest dielectric loss (tan d) of about 0.051 at 1 kHz, together with a maximum energy-density (W) of about 22.7 J cm À3 and corresponding efficiency (h) of about 51.5%, were obtained at room temperature in the 860 nm-thickness film with TiO 2 layers coated alternately with NKBT-Sc layers. Moreover, energy-density and the corresponding efficiency of the TiO 2 -coated NKBT-Sc films varied slightly over a temperature range from À150 C to 150 C as well as at a frequency range from 100 Hz to 6 kHz, meaning a greatly enhanced temperature dependent energy-storage stability and a frequency dependent energy-storage stability. In addition, leakage current density (J) of the 860 nm-thickness TiO 2 -coated NKBT-Sc film was maintained at a relatively low value. This also means that it can work in a wide operating temperature. This much enhanced energy-storage density and good temperature stability make NKBT-Sc films to be a promising lead-free material for energy storage capacitor applications.

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Effect of nickel doping on structural, optical and electrical properties of TiO2 nanoparticles by sol–gel method

Cited by 101 publications

References 30 publications

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

Structural, optical, photocatalytic, and antimicrobial activities of cobalt-doped tin oxide nanoparticles

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films

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Effect of nickel doping on structural, optical and electrical properties of TiO2 nanoparticles by sol–gel method

Cited by 101 publications

References 30 publications

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

Structural, optical, photocatalytic, and antimicrobial activities of cobalt-doped tin oxide nanoparticles

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na0.85K0.15)0.5Bi0.5TiO3 films

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Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films