Article
Materials Science, Multidisciplinary
Ummer Altaf, Mohd Zubair Ansari, Seemin Rubab
Summary: The synthesis of Sn1-xAlxO2 (x = 0.0, 0.01, 0.02, 0.03, 0.04) nanoparticles by the sol-gel method and their characterization using various techniques revealed that increasing the aluminium content led to a decrease in the crystallite size and optical band gap. Photoluminance measurements showed violet emissions for all samples, with the 3% doped sample exhibiting the lowest intensity, indicating its potential for applications in photocatalysis and lithium-ion batteries. Additionally, 3% aluminium doping was found to be the optimum concentration for tin oxide samples in photocatalytic applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Sri Suryani, Asni Damayanti, Heryanto Heryanto, Roni Rahmat, Syarifuddin Syarifuddin, Dahlang Tahir
Summary: ZnO/chitosan coated wool fabric with different pH (5, 7, and 9) showed self-cleaning properties. The fabric samples were irradiated with UVA-UVB lamps for 15 hours with dye stains. The ZnO/chitosan composites were characterized using XRD, FTIR, and UV-Visible spectroscopy. The samples with pH 9 demonstrated the best self-cleaning performance due to the smallest crystallite size, highest bandgap, and maximum Delta (LO-TO) distance.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Ali B. Abou Hammad, Amany M. El Nahrawy, A. M. Mansour
Summary: CdZnNiPO (CZNP) thin films were successfully grown on glass and p-Si substrates using the sol-gel spin coating method. The structure, morphology, and optical properties of the films were analyzed using various techniques.
Article
Materials Science, Ceramics
Rina R. Tikare, Rohit R. Powar, Sharadchandra S. Patil, Dhanaji G. Kanase
Summary: Mixed metal oxides with different iron content (x = 0.2-1.0) were synthesized using sol-gel auto combustion process. The properties of the oxide materials were characterized using various techniques. The results showed that the replacement of aluminium ions affected the structure, bandgap, and crystallite size of the mixed metal oxides. The iron-substituted aluminate gas sensors exhibited good performance in detecting gases such as CO, H2S, and NO2.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Amirreza Safartoobi, Jamal Mazloom, Farhad Esmaeili Ghodsi, Komail Boustani
Summary: Novel manganese-substituted copper ferrite nanofibers were prepared by sol-gel electrospinning technique. The fibers were investigated for their structural, chemical, morphological, elemental, optical, and magnetic characteristics. The results showed changes in crystallite size, lattice strain, and optical band gap due to Mn incorporation, as well as the presence of different morphologies and enhanced magnetic properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kaustubh Sudhakar, Avishek Karmakar, Hussein O. Badr, Tarek El-Melegy, Mary Q. Hassig, Michael Carey, Stefan Masiuk, Liyan Wu, Qian Qian, Takayuki Kono, Christopher Y. Li, Michel W. Barsoum
Summary: In this study, one-dimensional titania-based nanofilaments were synthesized via a hydrothermal method. It was found that regardless of the precursor materials and processing conditions, these nanofilaments served as the essential building blocks in all microstructures. This discovery is of significant importance for understanding and controlling the self-assembly process of nanomaterials.
Article
Chemistry, Physical
A. Pakalniskis, R. Skaudzius, D. V. Zhaludkevich, A. L. Zhaludkevich, D. O. Alikin, A. S. Abramov, T. Murauskas, V. Ya. Shur, A. A. Dronov, M. V. Silibin, A. Selskis, R. Ramanauskas, A. Lukowiak, W. Strek, D. V. Karpinsky, A. Kareiva
Summary: In this study, samarium substituted bismuth ferrite ceramics were prepared by sol-gel synthesis method and studied using various microscopic techniques to investigate the evolution of crystal structure across the morphotropic phase boundary region. The compounds exhibited structural transitions from polar active rhombohedral phase to anti-polar orthorhombic phase and then to non-polar orthorhombic phase within a specific concentration range. The results revealed a coexistence of different structural phases in the compounds, with a notable difference in the concentration range ascribed to the morphotropic phase boundary estimated by microscopic measurements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Pragya Joshi, Sudeep Tiwari, Khushboo Punia, Sudhish Kumar
Summary: This work investigates the synthesis, structure, optical, electrical and magnetic properties of undoped and doped TiO2 nanoparticles. The results reveal that the doped TiO2 nanoparticles have high crystallinity and a narrow size distribution, with a red shift in the band gap. Defects and oxygen vacancies are observed in these nanoparticles, which exhibit semiconductor and weak ferromagnetic properties.
Article
Multidisciplinary Sciences
Mohammad Humaun Kabir, Humayra Ibrahim, Sikder Ashikuzzaman Ayon, Md. Muktadir Billah, Sharif Neaz
Summary: In this study, undoped and Fe-doped CuO thin films were prepared using the sol-gel spin coating technique. It was found that Fe doping improved the particle size and distribution, and tuned the bandgap of the films. In addition, the films showed good optical properties and antifungal activity.
Article
Physics, Multidisciplinary
Ahmed Kadari, Khaled Aissaoui, Intesar A. El-Mesady
Summary: Zn2SnO4 nanostructures doped with different rare earth elements (Dy3+, Sm3+, Yb2+, Eu3+ and Gd2+) were synthesized using sol-gel method. The crystallographic nature of the prepared materials was confirmed by X-Rays Diffraction (XRD). The particle sizes were calculated to be approximately 24 nm. The chemical bond types were identified through Fourier Transform Infrared spectroscopy (FTIR). The dopants affected the absorbance spectra, with a decrease in energy band gap (E (opt)) from 3.89 eV to 2.80 eV for direct transitions and a range of 3.93 to 2.25 eV for indirect transitions. The Urbach energies (E-U) were found to be within the range 0.70-0.42 eV. These results suggest that the suggested dopants can be utilized in the correct form in industrial applications.
Article
Optics
Pawan Kumar, Devender Singh, Isha Gupta, Sitender Singh, Simran Nehra, Ramesh Kumar
Summary: Sm3+ activated Y4Al2O9 nanophosphors were synthesized using urea aided gel-combustion route. The nanosamples exhibit monoclinic crystal structure with P21/c space group. Under excitation at 406 nm, the Y4Al2O9:Sm3+ nanophosphor emits reddish-orange light with emission peaks at 566 nm, 602 nm, and 651 nm corresponding to transitions 4G5/2 -> 6H 5/2, 6H 7/2, and 6H 9/2, respectively. The optimal dopant concentration is observed to be 3 mol%, and dipole-quadruple interactions among dopant ions contribute to concentration quenching. Evaluation of chromaticity parameters, color temperature, and color purity suggests the potential applicability of these nanophosphors for indoor lighting applications.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Mongi Chebbi, Salaheddine Mansouri, Sobhi Hcini, Imed Ghiloufi, Asmae Mimouni, Lassaad El Mir
Summary: The primary objective of this study is to comprehensively examine how the calcination temperature affects the structural, infrared, and optical properties of Mg0.6Co0.4FeCrO4 compounds. The study found that as the calcination temperature increased, the crystallite size increased, the optical band gap energy decreased, and the Urbach energy values decreased. Additionally, the dispersion parameters and the real and imaginary parts of the dielectric permittivity were significantly influenced by the calcination temperature.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Inorganic & Nuclear
Prathibha Vasudevan, Arun S. Prasad
Summary: Zinc oxide nanoparticles were successfully synthesized using sol-gel technique and Azadirachta indica leaves extract, with characterization done through various techniques to study their structure, size, morphology, and crystallite parameters. Optical properties investigation showed that these nanoparticles have potential for white luminescence applications.
JOURNAL OF CLUSTER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Asad Ur Rehman Khan, Muhammad Ramzan, Muhammad Imran, Muhammad Zubair, Sana Shahab, Sara J. Ahmed, Fabio Ferreira, Muhammad Faisal Iqbal
Summary: ZnO is a promising material for optoelectronic applications due to its low resistivity, high transmittance, and tunable optical band gap. In this study, un-doped and Zr-doped ZnO nanostructures were synthesized using the sol-gel technique. Various characterization techniques were employed to investigate the structural, optical, and electrical properties of the nanostructures. The results showed that Zr doping increased the crystallite size, introduced oxygen vacancies, and caused a blue shift in the band gap. Electrical measurements revealed a reduction in resistance and high carrier concentration in the Zr-doped layer. The ZZO nanostructures exhibited high optical transmittance, wide band gap, low resistivity, and high carrier concentration, making them promising for transparent conductive oxide applications in optoelectronic devices.
Article
Materials Science, Ceramics
Deniz Coban Ozkan, Ahmet Turk, Erdal Celik
Summary: A new approach for dye-synthesized solar cells using perovskite and single oxide micro/nanopowders has been realized. The combination of perovskite and single oxide micro/nanopowders in a composite structure achieves the desired energy efficiency. Precursor solutions for dye-synthesized solar cells with FTO/TiO2/ferroelectric/dye/electrolyte/Pt/FTO architecture were prepared using nitrate-based salts, solvents, and chelating agents. TiO2 and LaFeO3 powders were characterized through various techniques. The production of dye-sensitized solar cells with TiO2 and LaFeO3 powders shows potential for innovative and futuristic applications.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2023)
