X-ray peak profiling, optical parameters and catalytic properties of pure and CdS doped ZnO–NiO nanocomposites

Ditta, Maryam Allah; Farrukh, Muhammad Akhyar; Ali, Shaista; Younas, Naeem

doi:10.1134/s1070427217010220

Cited by 34 publications

(12 citation statements)

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“…The refractive index ( n ) of a material is an important parameter that plays a vital role in designing optical devices and provides information regarding light's local field, polarization, and phase velocity. The incorporation of Sb into the SnS host matrix changed the linear refractive index, which was evaluated by using the transmission data as follows 56 :

\begin{equation}n\; = \;\frac{1}{T} + \frac{1}{{{{(T - 1)}^{0.5}}}}\end{equation}

where T is the transmittance. The refractive index versus wavelength graph is shown in Figure 4A.…”

Section: Resultsmentioning

confidence: 99%

“…55 The refractive index (n) of a material is an important parameter that plays a vital role in designing optical devices and provides information regarding light's local field, polarization, and phase velocity. The incorporation of Sb into the SnS host matrix changed the linear refractive index, which was evaluated by using the transmission data as follows 56 :…”

Section: Transmission Absorption Coefficient Extinction Coefficient O...mentioning

confidence: 99%

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Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

et al. 2022

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The current paper reports the changes in the structural and optical properties of antimony-doped tin sulfide ternary (Sb x Sn 1-x S) (x = 0, 0.05, 0.1, 0.15, 0.2) thin films synthesized by the thermal evaporation technique on a glass substrate. Structural characterization techniques such as X-ray diffraction and Raman spectroscopy of the prepared sample revealed that the thin films are crystalline in nature. The nanoflake-like structure was found from the surface morphological analysis performed by field emission scanning electron microscopy. The concentration of the compositional elements was confirmed from the energy dispersive X-ray analysis. The linear and nonlinear optical parameters were calculated by using the transmission data obtained from UV-vis spectroscopy in the range of 800-1100 nm. The optical measurements showed an increase in transmittance and shifting of the absorption edge. The optical bandgap increased (1.239-1.378 eV) and the refractive index decreased with the increase of Sb concentration, satisfying the Moss rule. The nonlinear susceptibility and the nonlinear refractive index (n 2 ) decreased with Sb content. The changes in both linear and nonlinear parameters by varying the antimony doping concentration could be helpful for controlling the optical properties of Sb x Sn 1-x S thin films and could be a suitable candidate for many photonics and optoelectronic applications.

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\begin{equation}n\; = \;\frac{1}{T} + \frac{1}{{{{(T - 1)}^{0.5}}}}\end{equation}

where T is the transmittance. The refractive index versus wavelength graph is shown in Figure 4A.…”

Section: Resultsmentioning

confidence: 99%

Section: Transmission Absorption Coefficient Extinction Coefficient O...mentioning

confidence: 99%

Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

et al. 2022

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“…Another important optical constant is the refractive index (n), which offers knowledge about local fields, polarisation, and phase velocity of light in propagating substance and is used to design optical devices. The following equation ( 4) can be used to calculate it [54].…”

Section: Refractive Index Study (N)mentioning

confidence: 99%

Influence of KI Salt Concentration on The Hydroxypropyl Methylcellulose Films: Optical Study

Sannappa

Demappa

Sunilkumar

2021

Preprint

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Herein the optical properties of Hydroxypropylmethyl cellulose/Potassium iodide (HPMC/KI) composite films were determined. Casting technique was introduced to make HPMC/KI films with different KI salt concentrations (0.1–1) wt%. The absorbance model was used to determine parameters like absorption edge, refractive index, real and imaginary sections of dielectric function, extinction coefficient, Urbach energy, band gap and optical conductivity in the spectral range 200–800 nm. As shown by study, KI salt doping affects the optical properties of HPMC. The absorption edge (\({E}_{e}\)) was widely displaced towards a region of lower photonic energy. For the 1 wt% KI/HPMC film, the direct and indirect optical bandwidth gaps of pure HPMC were reduced from 5.6 eV to 2.56 eV and 5.86 to 2.5 eV respectively. The optical dielectric loss method was effectively employed as an alternate method for estimating the optical bandgap. In addition, the Tauc’s extrapolation method identified the kind of electronic transition. The variation of optical energy band gap and dielectric constant based on KI salt concentration was used to investigate the credibility of the Penn’s model. In salt-composite films, an increase in Urbach energy and optical conductivity were observed which may be evidence of large shift from tail-to-tail and band to tail. Meanwhile, X-ray diffraction (XRD) examination revealed that the KI salts damaged the HPMC polymer's crystalline phase. Lastly, the films were also subjected to Fourier transform infrared spectroscopy (FTIR). The considerable variation in transmittance and band change in FTIR spectra was exposed for doped films.

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“…According to Qiu et al [27] who studied the effect of N-doping on the PC performance of ZnO, the forbidden band width decreased significantly and the PC activity was enhanced after the N 2p impurity energy level appeared. Doping could also change the microstructure of the material [24,28,29]. Etacheri et al [30] revealed that Mg-doped ZnO exhibited a significant c-axis compression and decreased grain size, and its specific surface area was twice as large as that of pure ZnO.…”

Section: Introduction mentioning

confidence: 99%

Electronic structure and enhanced photoelectrocatalytic performance of RuxZn1−xO/Ti electrodes

et al. 2021

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Modification is one of the most important and effective methods to improve the photoelectrocatalytic (PEC) performance of ZnO. In this paper, the RuxZn1−xO/Ti electrodes were prepared by thermal decomposition method and the effect of Ru content on those electrodes’ electronic structure was analyzed through the first-principles calculation. Various tests were also performed to observe the microstructures and PEC performance. The results showed that as the Ru4+ transferred into ZnO lattice and replaced a number of Zn2+, the conduction band of ZnO moved downward and the valence band went upward. The number of photogenerated electron-hole pairs increased as the impurity levels appeared in the band gap. In addition, ZnO nanorods exhibited a smaller grain size and a rougher surface under the effect of Ru. Meanwhile, the RuO2 nanoparticles on the surface of ZnO nanorods acted as the electron-transfer channel, helping electrons transfer to the counter electrode and delaying the recombination of the electron-hole pairs. Specifically, the RuxZn1−xO/Ti electrodes with 9.375 mol% Ru exhibited the best PEC performance with a rhodamine B (RhB) removal rate of 97%, much higher than the combination of electrocatalysis (EC, 12%) and photocatalysis (PC, 50%), confirming the synergy of photoelectrocatalysis.

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X-ray peak profiling, optical parameters and catalytic properties of pure and CdS doped ZnO–NiO nanocomposites

Cited by 34 publications

References 45 publications

Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

Influence of KI Salt Concentration on The Hydroxypropyl Methylcellulose Films: Optical Study

Electronic structure and enhanced photoelectrocatalytic performance of RuxZn1−xO/Ti electrodes

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X-ray peak profiling, optical parameters and catalytic properties of pure and CdS doped ZnO–NiO nanocomposites

Cited by 34 publications

References 45 publications

Effect of Sb addition on SbxSn1‐xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

Effect of Sb addition on SbxSn1‐xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

Influence of KI Salt Concentration on The Hydroxypropyl Methylcellulose Films: Optical Study

Electronic structure and enhanced photoelectrocatalytic performance of RuxZn1−xO/Ti electrodes

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Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications

Effect of Sb addition on Sb_xSn_1‐_xS thin films: The structural, morphological, and linear/nonlinear optical changes for optoelectronic applications