Enhancement in the Structural, Electrical, Optical, and Photocatalytic Properties of La 2 O 3 -Doped ZnO Nanostructures.

Autor: Ganesh V; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia., AlAbdulaal TH; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia., AlShadidi M; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia., S A Hussien M; Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt.; Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt., Bouzidi A; Research Unit, Physics of Insulating and Semi-Insulating Materials, Faculty of Sciences, University of Sfax, P.O. Box 1171, Sfax 3000, Tunisia.; Preparatory Year Program, Shaqra University, Al-Quwayiyah Branch, Shaqra 19248, Saudi Arabia., Algarni H; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia., Zahran HY; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt., Abdel-Wahab MS; Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni Suef 62511, Egypt., Mohammed MI; Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt., Yahia IS; Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt., Narapureddy BR; Department of Public Health, College of Applied Medical Sciences, King Khalid University, Asir Region, P.O. Box 61421, Abha 61413, Saudi Arabia.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2022 Oct 02; Vol. 15 (19). Date of Electronic Publication: 2022 Oct 02.
DOI: 10.3390/ma15196866
Abstrakt: A lanthanum oxide (La 2 O 3 )-ZnO nanostructured material was synthesized in the proposed study with different La 2 O 3 concentrations, 0.001 g to 5 g (named So to S7), using the combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transformation infrared spectroscopy (FT-IR) were utilized for investigating the structure, morphology, and spectral studies of the La 2 O 3 - ZnO nanomaterials, respectively. The results obtained from previous techniques support ZnO's growth from crystalline to nanoparticles' fine structure by changing the concentrations of lanthanum oxide (La 2 O 3 ) dopants in the host matrix. The percentage of ZnO doped with La- influences the ZnO photocatalytic activity. SEM analysis confirmed the grain size ranged between 81 and 138 nm. Furthermore, UV-Vis diffuse reflectance spectroscopy was performed to verify the effects of La 2 O 3 dopants on the linear optical properties of the nano-composite oxides. There was a variation in the energy bandgaps of La 2 O 3 -ZnO nanocomposites, increasing the weight concentrations of lanthanum dopants. The AC electrical conductivity, dielectric properties, and current-voltage properties support the enactment of the electrical characteristics of the ZnO nanoparticles by adding La 2 O 3 . All the samples under investigation were used for photodegradation with Rhodamine B (RhB) and Methylene Blue (MB). In less than 30 min of visible light irradiation, S4 (0.5 g) La 2 O 3 -ZnO reached 99% of RhB and MB degradation activity. This study showed the best photocatalytic effect for RhB and MB degradation of 0.13 and 0.11 min -1 by 0.5 g La 2 O 3 -ZnO. Recycling was performed five times for the nanocatalysts that displayed up to 98 percent catalytic efficiency for RhB and MB degradation in 30 min. The prepared La 2 O 3 -ZnO nanostructured composites are considered novel candidates for various applications in biomedical and photocatalytic studies.
Databáze: MEDLINE
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