Synthesis, characterization and optical properties of in situ ZnFe2O4 functionalized rGO nano hybrids through modified solvothermal approach

Ameer, Shahid; Gul, Iftikhar Hussain; Mahmood, Nasir; Mujahid, Mohammad

doi:10.1016/j.optmat.2015.02.035

Cited by 20 publications

(6 citation statements)

References 56 publications

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“…where, absorption coefficient (α) is directly related to the incident photons and E opt is known as the optical band gap of the material. The calculated E opt of the 3D GNs was found to 3.9 eV, which is found to be similar with previous reported optical band gaps for the graphene based materials [74], where these graphene based materials can be employed as a candidate for electrode materials for various photovoltaic devices (Figure 5 (b)). Further, Urbach energy (E u ) was also evaluated to estimate the band gap (E g ) between the HOMO/LUMO of the 3D GNs by using the following relation…”

Section: Resultssupporting

confidence: 88%

3D graphene nanosheets from plastic waste for highly efficient HTM free perovskite solar cells

et al. 2021

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Section: Resultssupporting

confidence: 88%

3D graphene nanosheets from plastic waste for highly efficient HTM free perovskite solar cells

et al. 2021

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“…Therefore, the optical band-gap of GO may be anywhere between semiconducting 1 eV and as high as 4.5 eV [26]. From the Tauc plot shown in Figure 3A for the GO sample, the optical band-gap value can be measured in the range of 3.3-4.2 eV, which has good agreement with the values reported for GO in the literature [27][28][29].…”

Section: Linear Optical Propertiessupporting

confidence: 85%

Effect of temperature on the structural, linear, and nonlinear optical properties of MgO-doped graphene oxide nanocomposites

Kimiagar

Abrinaei

2017

Nanophotonics

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Magnesium oxide (MgO)-graphene oxide (GO) nanocomposites were prepared by the hydrothermal method at different temperatures. The effect of growth temperature on the structural, linear, and nonlinear optical (NLO) parameters was investigated. The decoration of MgO on GO sheets was confirmed by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and UV-visible (UV-vis) spectroscopy analyses. The energy band-gaps of MgO-GO nanocomposites were calculated from UV-vis spectrum using Tauc plot. The NLO parameters of MgO-GO nanocomposites were calculated for the first time by the simple Z-scan technique with nanosecond Nd:YAG laser at 532 nm. The nonlinear absorption coefficient β and nonlinear refractive index n 2 for MgO-GO nanocomposites at the laser intensity of 1.1 × 10 8 W/cm 2 were measured to be in the order of 10 −7 cm/W and 10 −12 cm 2 /W, respectively. The third-order NLO susceptibility of MgO-GO nanocomposites was measured in the order of 10 −9 esu. The results showed that MgO-GO structures have negative nonlinearity as well as good nonlinear two-photon absorption at 532 nm. Furthermore, the NLO parameters increased by the enhancement of the growth temperature. As the investigation of new materials plays an important role in the advancement of optoelectronics, MgO-GO nanocomposites possess potential applications in NLO devices.

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“…The experimental results demonstrate that the lattice constant “a” increases from 8.32 Å to 8.45 Å with the increase in zinc content in Ni-based ferrites. Previously, Gul et al [50,51] and Vaidyanathan et al [37] also described that the lattice constant enhances with Zn substitution. The reason is that Zn 2+ ions possess larger ionic radius (0.83 Å) in comparison with Ni 2+ (0.74 Å) and Fe 3+ (0.65 Å) ions.…”

Section: Resultsmentioning

confidence: 98%

Influence of Zn+2 Doping on Ni-Based Nanoferrites; (Ni1−x ZnxFe2O4)

2019

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Nickel zinc nanoferrites (Ni1−xZnxFe2O4) were synthesized via a chemical co-precipitation method having stoichiometric proportion (x) altering from 0.00 to 1.00 in steps of 0.25. The synthesized nanoparticles were sintered at 800 °C for 12 h. X-ray diffraction patterns illustrate that the nanocrystalline cubic spinel ferrites have been obtained after sintering. The Scherrer formula is used to evaluate the particle size using the extreme intense peak (311). The experimental results demonstrate that precipitated particles’ size was in the range of 20–60 nm. Scanning electron microscopy (SEM) is used to investigate the elemental configuration and morphological characterizations of all the prepared samples. FTIR spectroscopy data for respective sites were examined in the range of 300–1000 cm−1. The higher frequency band ν1 were assigned due to tetrahedral complexes while lower frequency band ν2 were allocated due to octahedral complexes. Our experimental results demonstrate that the lattice constant a0 increases while lattice strain decreases with increasing zinc substitution in nickel zinc nanoferrites.

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Synthesis, characterization and optical properties of in situ ZnFe2O4 functionalized rGO nano hybrids through modified solvothermal approach

Cited by 20 publications

References 56 publications

3D graphene nanosheets from plastic waste for highly efficient HTM free perovskite solar cells

3D graphene nanosheets from plastic waste for highly efficient HTM free perovskite solar cells

Effect of temperature on the structural, linear, and nonlinear optical properties of MgO-doped graphene oxide nanocomposites

Influence of Zn+2 Doping on Ni-Based Nanoferrites; (Ni1−x ZnxFe2O4)

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