Doped Cerium Oxide: Effect of Sintering Temperature on Density, Structural and Morphological Properties of Mg, Sr Doped Ceria | Chapter 9 | Current Perspective to Physical Science Research Vol. 9

 

Doped Cerium oxide continued to be the candidate electrolyte material due to its stability and superior ionic conductivity compared to YSZ. Strontium doped and Magnesium doped Ceria solid solutions, Ce0.99Sr0.01O1.995 and Ce0.99Mg0.01O1.995 were synthesized by cost-effective solid-state reaction method and were sintered at 1200oC, 1300oC and 1400oC to investigate the effect of sintering temperature and doping on density, structural and morphological properties. The bulk densities were measured by the Archimedes method. X-ray diffraction (XRD) measurements indicate that the synthesized samples were in single-phase cubic fluorite structure (space group Fm3m). The surface morphology was determined using scanning electron microscopy (SEM), micrographs show spherical faceted grains, and the samples were crack-free, dense material with some pores on the surface which are inconsistent with density results. The chemical composition was analyzed by the EDS technique. It is observed that the density increases with increasing sintering temperature and with doping of strontium. The grain size depends on the sintering temperature and type of doping. The lattice parameter increases with sintering temperature and substitution of Sr in ceria. The Grain size of Sr-doped ceria decreases, whereas that of Mg-doped ceria increases. EDS spectra show that the samples are free of contaminants. The Ce_0.99Sr_0.01  O_1.995 shows a more open structure than the undoped ceria.

Author(s) Details:

Syed Ismail Ahmad,
General Sciences Department – Physics Division, Ibn Sina National College for Medical Studies, P.O. Box No. 31096, Jeddah 21418, Saudi Arabia.

 

Please see the link here: https://stm.bookpi.org/CPPSR-V9/article/view/14317

Production of Ag and ZnO Nanoparticles Using Morinda citrifolia Extract and Comparison of Their Antibacterial Study of Nanoparticle-impregnated Jean Fabric | Chapter 8 | Advanced Concepts in Pharmaceutical Research Vol. 4

 Morinda citrifolia usually called as Noni belongs to Rubiaceae family was secondhand for synthesis of Ag and ZnO nanoparticles using green combination method. Morinda citrifolia (Noni) product juice is used as cure for several diseases in the way that arthritis, diabetics, high blood pressure, power aches and pains, menstrual problems, headaches, heart afflictions, AIDS, malignancy, gastric ulcers, sprains, mental despair, senility, poor digesting, atherosclerosis, blood vessel problems and drug hook. Noni has unique curative properties which help in normalization of unusually functioning cells by delivering the biography-chemical nutrients. Noni new fruits obtained from the forests present in the campus of GITAM, Visakhapatnam, India. Combined Ag and ZnO nanoparticles have been applied aware jean fabric by dip and cure method. Nanoparticles were from different methods in the way that UV- VISIBLE, FTIR, SEM, EDS, TEM and a comparative study of antimicrobial action were done. The happening of colour change in the nanoparticles was confirmed by UV – Spectroscopy. Identification of working groups in fruit which was being the reason for reduction of nanoparticles was observed by FTIR reasoning. The size and study of plants of the nanoparticles were observed by SEM and TEM. The presence of basic silver and zinc were rooted by EDS. The silver and zinc group of chemical elements nanoparticles synthesized using Noni product extract exhibited excellent inhibition against bacterial pathogens. Application of Ag and ZnO nanoparticles to jean material may reduce bacterial contaminations and blocks UV rays. Zone of hindrance of silver was almost akin to zinc group of chemical elements nanoparticles but comparative to silver, metallic mineral oxide was cost effective and less poisonous.

Author(s) Details:

Kantipriya Kondala,
Department of Biotechnology, College of Science, Dr. B R Ambedkar University, Etcherla, Srikakulam, Andhra Pradesh, India.

Sarvamangala Dhurjeti,
Department of Biotechnology, GIT, GITAM (Deemed to be University), India.

Sivakumar N.,
Department of Biochemistry, School of Life Science, University of Hyderabad, India.

Murthy U. S. N.,
Department of Ophthalmology, Gayatri Vidya Parishad Institute of Health Care and Medical Technology, Visakhapatnam, India.

Please see the link here: https://stm.bookpi.org/ACPR-V4/article/view/12929