X-ray diffraction line profile analysis: A microstructural study in polymorphic TiO2

Santos-Aguilar, Pamela; Contreras‐Torres, Flavio F.

doi:10.1016/j.matpr.2019.03.175

Cited by 3 publications

(4 citation statements)

References 21 publications

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“…For TiO 2 -anatase, the values a = 3.7878 Å and c = 9.5221 Å were obtained. These values are comparable to others studies that determined by several techniques minimal variations of TiO 2 -anatase lattice parameters as a function of particle size. , For TiO 2 -rutile, the lattice parameters a = 4.5949 Å and c = 2.9597 Å were obtained, which are similar to values previously reported for rutile obtained from calcination processes. Additionally, the crystallite size was estimated at 111 and 307 nm, for TiO 2 -anatase and TiO 2 -rutile, respectively.…”

Section: Resultssupporting

confidence: 91%

“… 50 Likewise, the microstrain in TiO 2 -rutile particles suggests the presence of dislocations and other crystal defects. For comparison, the Warren–Averbach analysis for TiO 2 -anatase and TiO 2 -rutile 40 was used to estimate the apparent crystallite size. The natural logarithm of the size coefficient A s ( L ) for the ⟨112⟩ and ⟨200⟩ family planes yield smaller crystallite sizes of approximately 29 nm and 21 nm for TiO 2 -anatase and TiO 2 -rutile, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In this way, the broadening of the diffraction lines can be expressed as the linear contribution of the functions caused by the crystallite size and the microstrain present in the crystalline lattice. The WA method includes the dependence of crystallite size and strain through a Fourier series, A s ( L ) and A D ( L ), respectively, representing the peak profiles ln nobreak0em.25em⁡ A ( g h k l , L ) ≅ ln nobreak0em.25em⁡ A s 0.25em ( L ) − 2 π 2 g h k l 2 L 2 ⟨ ε 2 ⟩ …”

Section: Methodsmentioning

confidence: 99%

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Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

et al. 2023

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The widespread use of titanium dioxide (TiO 2 ) has raised concerns about potential health risks associated with its cytotoxicity in the cardiovascular system. To evaluate the cytotoxicity of TiO 2 particles, the H9c2 rat cardiomyoblasts were used as a biological model, and their toxicological susceptibility to TiO 2 -anatase and TiO 2 -rutile particles was studied in vitro. The study examined dose and time exposure responses. The cell viability was evaluated based on metabolic inhibition and membrane integrity loss. The results revealed that both TiO 2 -anatase and TiO 2 -rutile particles induced similar levels of cytotoxicity at the inhibition concentrations IC 25 (1.4−4.4 μg/cm 2 ) and IC 50 (7.2−9.3 μg/cm 2 ). However, at more significant concentrations, TiO 2 -rutile appeared to be more cytotoxic than TiO 2 -anatase at 24 h. The study found that the TiO 2 particles induced apoptosis events, but necrosis was not observed at any of the concentrations of particles used. The study considered the effects of microstructural properties, crystalline phase, and particle size in determining the capability of TiO 2 particles to induce cytotoxicity in H9c2 cardiomyoblasts. The microstress in TiO 2 particles was assessed using powder X-ray diffraction through Williamson−Hall and Warren−Averbach analysis. The analysis estimated the apparent crystallite domain and microstrain of TiO 2 -anatase to be 29 nm (ε = 1.03%) and TiO 2 -rutile to be 21 nm (ε = 0.53%), respectively. Raman spectroscopy, N 2 adsorption isotherms, and dynamic light scattering were used to identify the presence of pure crystalline phases (>99.9%), comparative surface areas (10 m 2 /g), and ζ-potential values (−24 mV). The difference in the properties of TiO 2 particles made it difficult to attribute the cytotoxicity solely to one variable.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

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“…The electrochemical impedance spectroscopy (EIS) was performed with a Sharif Solar PGE-18 instrument. [19]. We clearly see in these spectra that Ag treatment has not caused any significant alteration on the crystallinity of the TiO 2 nanofibers.…”

Section: 2 Experimentsmentioning

confidence: 72%

Efficiency enhancement in dye-sensitized solar cells through the decoration of electro-spun TiO2 nanofibers with Ag nanoparticles

Moradi

Abrari

Ahmadi

2020

J Mater Sci: Mater Electron

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Dye-sensitized solar cells (DSSCs) are low cost and eco-friendly photovoltaic devices which require new ideas for further development. In this paper, we use electro-spun TiO 2 nanofibers to prepare the DSSCs photoanode. In order to isolate the FTO and electrolyte species, we deposit a spin-coated TiO 2 blocking layer at their interface. The performance of this cell is further improved by introducing surface plasmon resonances (SPRs) at the surface of the nanofibers. It is shown that SPRs increase the generated current in the cells by providing a higher light absorption and lower recombination. Our best cell showed an efficiency of 6.19%, which is a 28% improvement in comparison to the bare DSSC with 4.84% efficiency. The results of this paper are acquired and confirmed by XRD, FESEM, TEM, EDS, dye-loading, IPCE, J-V, and EIS measurements.

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Microstructure of polycrystalline solids: A brief review from methods in X-ray line profile analysis

Murrieta

Contreras‐Torres

2022

Materials Today: Proceedings

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X-ray diffraction line profile analysis: A microstructural study in polymorphic TiO2

Cited by 3 publications

References 21 publications

Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

Efficiency enhancement in dye-sensitized solar cells through the decoration of electro-spun TiO2 nanofibers with Ag nanoparticles

Microstructure of polycrystalline solids: A brief review from methods in X-ray line profile analysis

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X-ray diffraction line profile analysis: A microstructural study in polymorphic TiO2

Cited by 3 publications

References 21 publications

Synthesis and Characterization of Rutile TiO2 Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

Synthesis and Characterization of Rutile TiO2 Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

Efficiency enhancement in dye-sensitized solar cells through the decoration of electro-spun TiO2 nanofibers with Ag nanoparticles

Microstructure of polycrystalline solids: A brief review from methods in X-ray line profile analysis

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Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats

Synthesis and Characterization of Rutile TiO₂ Nanoparticles for the Toxicological Effect on the H9c2 Cell Line from Rats