TO STUDY THE EFFECT OF PH ON STRUCTURAL PROPERTIES ON CHEMICALLY SYNTHESIZED MgO NANO FLECK

ABSTRACT

Among material science the metallic oxide crystalline at nano scale are  most  interesting area for the researchers and scientists due to their unique surface morphology and high surface area and enrichment of surface atom. Among other  metal oxide nanomaterials, magnesium oxide (MgO) nanofleck is an exceptionally key material and has been broadly used in fire retardation , refractory materials ,catalysis, antibacterial ,toxic waste remediation, for hydrogen storage , paints, and superconductor products owning to its unique properties in the field of photonic, optics , electronic ,magnetic, electrical, mechanical &chemical properties. The present work emphasize to synthesis mechanism with varying Ph conditions with microwave in MgO nano-crystalline and  ammonia (15M) is used as precipitating agent. The samples were calcinated at 600°C in air for 4hrs  to transform into MgO powder samples. The variation in size were evaluated by using X-ray diffraction (XRD) pattern as study shows that size of nanocrystalline shows increasing behaiour with increase of PH from 8 to 10. The  infrared spectroscopy (IR) of the calcined samples shows that the nano flecks are free from other transition state and only change in intensity observed with hike in PH values. The transmission through electron microscopy (TEM) images of MgO nanostuff exhibited flakes-like structure. The observed optical band gap energy of MgO nano fleck were evaluated by using UV-Vis-NIR  diffused reflectance spectroscopy (DRS) and found that E_g  values decrases with increase of Ph values from to 5.92eV .

FULL TEXT