X-ray diffraction analysis of nanocomposite <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1220" altimg="si3.svg"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>/activated carbon by Williamson–Hall and size-strain plot methods

Ilyas, Sultan; Heryanto, Heryanto; Abdullah, Bualkar; Tahir, Dahlang

doi:10.1016/j.nanoso.2019.100396

Cited by 89 publications

(21 citation statements)

References 14 publications

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“…(right) and opposite trend for 5 gr of TiO2 in ZnO/TiO2 composite as can be seen in Figure 6. The best composite for photocatalyst is for low attenuating and propagating constant, means that the structure will easily suppressing recombination of the charge particle due to the higher strain between the atoms [52,54]. In this study shows 5 gr of TiO2 in ZnO/TiO2 composite high potentials compared than that of 2.5 gr TiO2 in ZnO/TiO2 composite for the same calcination temperature [64].…”

Section: Optical Propertiesmentioning

confidence: 52%

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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Composite ZnO/TiO2 have been successfully synthesized by green synthesis method with various calcination temperature 500oC, 600oC, 700oC, and 800oC (TiO2 concentrations: 2.5 g and 5 g) for photocatalyst application. In this study, Calopogonium mucunoides leaf extract was used as reducing and stabilizing agent. The synthesized composites were characterized by using Fourier Transform Infra-Red (FTIR), X-Ray Diffraction (XRD), and UV-Visible spectroscopy. The XRD spectra shows the hexagonal phase with wurtzite structure of ZnO and anatase for TiO2. The best degradation performance is 98.26% (only 10 min) for ZnO/TiO2 (5 g) with calcination temperature is 800oC. This is due to the highest distance between two optical phonon mode Δ(LO-TO) and lowest attenuating and propagating constant. The composite ZnO/TiO2 shows high potentials photodegradation of organic dyes with the high stable recyclability up to 5 cycles (> 95%) only for every 15 minutes. High potentials for applicability with the concept environmentally friendly principles and stability for circular chemistry, and efficiency of use the energy and chemicals.

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Section: Optical Propertiesmentioning

confidence: 52%

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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“…where D is the grain size (nm), 𝜖 is the strain, 𝜆 is the wavelength (nm), K is a constant (0.94), 𝜃 is the peak position, 𝛽 hkl is the peak width at half-maximum intensity, calculated by a method previously reported. [18,19,20] The values of 𝛽 hkl for BVO-(100), BVO-(010), and BVO-(001) are, respectively, 64.8," 61.2," and 86.4," as shown in Figure 3c. By potting 4sin𝜃, the average size of the grains and the strain can be estimated by the Y intercept extrapolation and the slope of the line…”

Section: Resultsmentioning

confidence: 98%

Investigation on Growth and Anisotropic Charge Lifetime of BiVO₄ Crystal

Zhang

et al. 2023

Cryst. Res. Technol.

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Centimeter-sized monoclinic BiVO 4 (BVO) crystals are successfully grown by Bridgman method, and the physical and chemical properties of their exposed crystal surfaces have been studied. It is found that the atomic alignment and atomic density on different types of crystal facets of BiVO 4 are different, which results in significant differences in its bandgap, charge lifetime, Raman scattering, and thermal diffusivity. Compared with other exposed crystal surfaces, the (010) oriented BiVO 4 crystal has the lowest bandgap and the longest charge lifetime, with corresponding values of 2.26 eV and 11.44 ns, respectively. Besides, the (010) oriented BiVO 4 crystal has a good thermal stability. This result indicates that the (010) oriented BiVO 4 crystal has a wider optical absorption range, higher photogenerated charge mobility and stability, which is very important for understanding the influence of crystal orientation on electrode properties and the preparation of high-efficiency photoelectrochemical photoanode.

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“…For this reason, the Williamson–Hall method was employed to estimate the average crystallite size of all the samples. 32 , 33 The Williamson–Hall method takes into consideration the width of the diffraction peak as a function of the diffraction angle 2θ. It assumes that the broadening of XRD peaks originates from the small crystallite size and microstrain.…”

Section: Resultsmentioning

confidence: 99%

Influence of Irradiation Time on the Structural and Optical Characteristics of CuSe Nanoparticles Synthesized via Microwave-Assisted Technique

et al. 2021

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A rapid, sustainable, and ecologically sound approach is urgently needed for the production of semiconductor nanomaterials. CuSe nanoparticles (NPs) were synthesized via a microwave-assisted technique using CuCl 2 ·2H 2 O and Na 2 SeO 3 as the starting materials. The role of the irradiation time was considered as the primary concern to regulate the size and possibly the shape of the synthesized nanoparticles. A range of characterization techniques was used to elucidate the structural and optical properties of the fabricated nanoparticles, which included X-ray diffraction, energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy, field emission scanning electron microscopy, Raman spectroscopy (Raman), UV–Visible diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). The mean crystallite size of the CuSe hexagonal (Klockmannite) crystal structure increased from 21.35 to 99.85 nm with the increase in irradiation time. At the same time, the microstrain and dislocation density decreased from 7.90 × 10 –4 to 1.560 × 10 –4 and 4.68 × 10 –2 to 1.00 × 10 –2 nm –2 , respectively. Three Raman vibrational bands attributed to CuSe NPs have been identified in the Raman spectrum. Irradiation time was also seen to play a critical role in the NP optical band gap during the synthesis. The decrease in the optical band gap from 1.85 to 1.60 eV is attributed to the increase in the crystallite size when the irradiation time was increased. At 400 nm excitation wavelength, a strong orange emission centered at 610 nm was observed from the PL measurement. The PL intensity is found to increase with an increase in irradiation time, which is attributed to the improvement in crystallinity at higher irradiation time. Therefore, the results obtained in this study could be of great benefit in the field of photonics, solar cells, and optoelectronic applications.

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X-ray diffraction analysis of nanocomposite Fe3O4/activated carbon by Williamson–Hall and size-strain plot methods

Cited by 89 publications

References 14 publications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Investigation on Growth and Anisotropic Charge Lifetime of BiVO₄ Crystal

Influence of Irradiation Time on the Structural and Optical Characteristics of CuSe Nanoparticles Synthesized via Microwave-Assisted Technique

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X-ray diffraction analysis of nanocomposite Fe3O4/activated carbon by Williamson–Hall and size-strain plot methods

Cited by 89 publications

References 14 publications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Investigation on Growth and Anisotropic Charge Lifetime of BiVO4 Crystal

Influence of Irradiation Time on the Structural and Optical Characteristics of CuSe Nanoparticles Synthesized via Microwave-Assisted Technique

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Investigation on Growth and Anisotropic Charge Lifetime of BiVO₄ Crystal