Facile synthesis and characterization of TiO2 nanoparticles: X-ray peak profile analysis using Williamson–Hall and Debye–Scherrer methods

Mustapha, S.; Tijani, Jimoh Oladejo; Ndamitso, M. M.; Abdulkareem, A. S.; Shuaib, D. T.; Amigun, Azeezah Taiwo; Abubakar, Hauwa Lamino

doi:10.1007/s40089-021-00338-w

Cited by 93 publications

(22 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The characteristic peak of Zn–O should have appeared at 618 cm –1 , which overlapped with CAR’s carboxyl peak located at 627 cm –1 , thus remained hidden. The crystallite size ( D , nm) of ZnO and Zn(OH) 2 [or Zn(OH) 2 /ZnO] NPs can be calculated through the Debye–Scherrer equation (eq ) D = k λ β .25em cos nobreak0em.25em⁡ θ where k = 0.94 (for spherical NPs), λ is the wavelength of X-ray radiation (0.1541 nm), and β is the full width at half-maximum (FWHM). According to this formula, the crystallite size of ZnO and Zn(OH) 2 [or Zn(OH) 2 /ZnO] NPs is as small as ∼0.1 nm (1 Å) and 4 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Biosynthesis of Zinc Oxide Nanoparticles on l-Carnosine Biofunctionalized Polyacrylonitrile Nanofibers; a Biomimetic Wound Healing Material

Homaeigohar,

Assad,

Azari

et al. 2023

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

Multifunctional biohybrid nanofibers (NFs) that can simultaneously drive various cellular activities and confer antibacterial properties are considered desirable in producing advanced wound healing materials. In this study, a bionanohybrid formulation was processed as a NF wound dressing to stimulate the adhesion and proliferation of fibroblast and endothelial cells that play a major role in wound healing. Polyacrylonitrile (PAN) electrospun NFs were hydrolyzed using NaOH and biofunctionalized with L-carnosine (CAR), a dipeptide which could later biosynthesize zinc oxide (ZnO) nanoparticles (NPs) on the NFs surface. The morphological study verified that ZnO NPs are uniformly distributed on the surface of CAR/PAN NFs. Through EDX and XRD analysis, it was validated that the NPs are composed of ZnO and/or ZnO/Zn(OH) 2 . The presence of CAR and ZnO NPs brought about a superhydrophilicity effect and notably raised the elastic modulus and tensile strength of Zn-CAR/PAN NFs. While CAR ligands were shown to improve the viability of fibroblast (L929) and endothelial (HUVEC) cells, ZnO NPs lowered the positive impact of CAR, most likely due to their repulsive negative surface charge. A scratch assay verified that CAR/PAN NFs and Zn-CAR/ PAN NFs aided HUVEC migration more than PAN NFs. Also, an antibacterial assay implied that CAR/PAN NFs and Zn-CAR/ PAN NFs are significantly more effective in inhibiting Staphylococcus aureus (S. aureus) than neat PAN NFs are (1000 and 500%, respectively). Taken together, compared to the neat PAN NFs, CAR/PAN NFs with and without the biosynthesized ZnO NPs can support the cellular activities of relevance for wound healing and inactivate bacteria.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The characteristic peak of Zn−O should have appeared at 618 cm −1 ,48 which overlapped with CAR's carboxyl peak located at 627 cm −1 , 38 thus remained hidden. The crystallite size (D, nm) of ZnO and Zn(OH) 2 [or Zn(OH) 2 /ZnO] NPs can be calculated through the Debye−Scherrer equation (eq 6)49…”

mentioning

confidence: 99%

Biosynthesis of Zinc Oxide Nanoparticles on l-Carnosine Biofunctionalized Polyacrylonitrile Nanofibers; a Biomimetic Wound Healing Material

Homaeigohar,

Assad,

Azari

et al. 2023

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

show abstract

“…The visible emission maxima at 442, 483, and 517 nm could be caused by band edge-free excitons [ 40 ]. The excitonic PL signal in the 400–550 nm region in photocatalysts is associated with surface oxygen vacancies or defects [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Antimicrobial and Antiproliferative Effects of CuO-TiO2-Chitosan-Escin Nanocomposites on Human Leukemic MOLT4 Cells

et al. 2022

View full text Add to dashboard Cite

Nanocomposites comprised of CuO-TiO2-chitosan-escin, which has adjustable physicochemical properties, provide a solution for therapeutic selectivity in cancer treatment. By controlling the intrinsic signaling primarily through the mitochondrial signaling pathway, we desired nanocomposites with enhanced anticancer activity by containing CuO-TiO2-chitosan-escin. The metal oxides CuO and TiO2, the natural polymer chitosan, and a phytochemical compound escin were combined to form CuO-TiO2-chitosan-escin nanocomposites. The synthesized nanocomposites were confirmed and characterized using FTIR spectroscopy, TEM, and UV-Vis absorption spectroscopy. A human leukemia cell line (MOLT-4) was used to assess the efficacy and selectivity of nanocomposites. Based on a cytotoxicity study, CuO-TiO2-chitosan-escin nanocomposites had inhibition concentrations (IC50) of 13.68, 8.9, and 7.14 µg/mL against human T lymphoblast cells after 24, 48, and 72 h of incubation, respectively. Compared with untreated MOLT-4 cells, CuO-TiO2-chitosan-escin nanocomposite-treated cells significantly increased (p < 0.05) caspase-3, -8, and -9 and decreased the levels of antioxidant enzymes GR, SOD, and GSH. Furthermore, MDA for lipid peroxidase and ROS levels significantly increased (p < 0.05) in the treated cells than in the untreated cells. Remarkably, CuO-TiO2-chitosan-escin nanocomposite-mediated control of cell cycles were mainly achieved through the activation of caspase-3, -8, and -9.

show abstract

“…As shown in Table . 1 18 , and this agreement with the study of Laith et al 24 . The crystallite size D was calculated from the Scherer relation 3 25 . D=Kλ/(β cos θ) ……….3 where K is a variable that fluctuates depending on the crystallite's natural form, λ is the X-ray wavelength; λ= 1.5418 Å, β is the full width at half maximum of intensity (FWHM), and θ is Bragg's angle.…”

Section: Xrd Analysismentioning

confidence: 99%

Synthesis and investigation of structural and optical properties of CdO: Ag nanoparticles of various concentrations

Muhammed

Abass

2023

Baghdad Sci.J

View full text Add to dashboard Cite

This study discussed the effects of doping with silver (Ag) on the optical and structural properties of CdO nanoparticles at different concentrations 0, 1, 2, 3, 4, 5 wt% prepared by the precipitation method. The materials were annealed at 550˚C for 1 h. The structural, topographical, and optical properties were diagnosed by X-ray diffraction analysis, atomic force instrument, and visible and ultraviolet spectrometers. The results show that the average diameter of the grains depends on the percentage of added silver to the material, as the diameter decreased from 88.8 to 59.7 nm, and it was found that the roughness increased from 5.56 to 26.5. When studying the optical properties, it was noted that the energy gap was 2.53ev for the pure sample and decreased to 2.38 When 5% of silver concentration was added to cadmium oxide

show abstract

Facile synthesis and characterization of TiO2 nanoparticles: X-ray peak profile analysis using Williamson–Hall and Debye–Scherrer methods

Cited by 93 publications

References 48 publications

Biosynthesis of Zinc Oxide Nanoparticles on l-Carnosine Biofunctionalized Polyacrylonitrile Nanofibers; a Biomimetic Wound Healing Material

Biosynthesis of Zinc Oxide Nanoparticles on l-Carnosine Biofunctionalized Polyacrylonitrile Nanofibers; a Biomimetic Wound Healing Material

Synthesis, Characterization, and Antimicrobial and Antiproliferative Effects of CuO-TiO2-Chitosan-Escin Nanocomposites on Human Leukemic MOLT4 Cells

Synthesis and investigation of structural and optical properties of CdO: Ag nanoparticles of various concentrations

Contact Info

Product

Resources

About