Physics
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Item Chemically Deposited Doped Titanate Ternary Metal Oxide Thin Films Via Spray Pyrolysis Route-Preparation, Characterization and Solar Cell Application Analysis(4th Africa Nano Conference and Workshop, 2021-07) Eze, C. N.; Onyia, A. I; Nnabuchi, A. ISpray pyrolysis method of deposition is a simple, cheap, low cost and conventional method that gives uniform deposition. With this motivation, a simple approach of spraying ZnTiO3 nanoparticles on a substrate is reported. The approach occurs with ternary metal oxide and is environmentally friendly. This follows the quest to further improve the physical and chemical properties of ternary metal oxide which has become noticeable in recent times. The crystallization temperature of ZnTiO3 was 2000C. Among other investigations the SEM result shows a perovskite structure-like morphology. Further characterization performed on the thin film for the structural aspect which gives XRD of the thin film shown on the diffractogram is in agreement with the standard diffraction of ZnTiO3 which is identified as tetragonal structure. UV-Vis absorption spectroscopy was also used to characterize the final product and the spectra indicated that the absorbance obviously increased in the visible light region with absorption peak at about 209 nm and with optical band gap which infers that it has potential application in solar energy devices.Item Surface Modification and Functionalization of Ceramic Composites.(Elsevier, 2023) Okeke, I. S; Obodo, R. M; Eze, C. N.; Orji, M. P; Agwu, K. K; Ubachukwu, A. A; Ezema, F. IMaterials with high dielectric constants are essential in the control and advancement of electronics and electrical power systems. The dielectric properties of materials majorly include dielectric constants (ꜫo) and loss tangent (tan ẟ), and for a material to be considered a very good dielectric material, it needs greater ꜫo, lower tan ẟ and reduced leakage current (J). Inorganic mixed transition oxides (MTMOS) ceramics composites have shown huge potential than the transition metal oxide because they constitute two or more metal elements with different expansion coefficients that give rise to synergistic effects. MTMOs ceramics composites are mostly found with spinel structure such as normal spinel structure (NSS) and inverse spinel structure (IVS). Several synthesis techniques have been used in formulation of MTMOs ceramic composites. Their dielectric properties have been modified considerately by altering its morphology, use of modifying agent, and high calcination temperatures. In this chapter, we summarized MTMOs major structure type synthesis technique that have been successfully used in preparation of MTMOs, the dielectric properties of MTMOs and basis of surface modification in MTMOs as well as its effect in the dielectric properties.Item The Role of Local Dyes in Dye-Doped Stannates and Titanates for Enhancement f Solar Energy Capture(FUDMA Journal of Sciences, 2025) Eze, C. N.Local dyes play a crucial role in enhancing solar energy capture in dye-doped stannates and titanates by acting as light-harvesting agents, boosting the efficiency of dye-sensitized solar cells (DSSCs). These dyes, when adsorbed onto the surfaces of porous semiconductor materials like TiO2, absorb incoming sunlight and then inject electrons into the semiconductor, initiating an electron transfer process that generates electricity. This process is similar to how plants capture sunlight in photosynthesis. Stannates and titanates, such as TiO2, ZnTiO3, BaSnO3 etc provide a porous surface for dye adsorption and act as the conductive material for electron transport. Their nanostructured surfaces increase the surface area available for dye adsorption, enhancing light capture.Item ATTAINMENT OF THE 7-POINT AGENDA IN NIGERIA THROUGH SCIENCE AND TECHNOLOGY(The Nigerian Journal of Research and Production, 2010-04) Eze, C. N.The 7-point agenda of the Nigerian President, Musa Umaru Yar’adua is a suitable road map to the quick modernization and industrialization of Nigeria. The agenda touches on the most important aspects of the needs of the people of this country. For instance, adequate supply of power and energy, the effective modernization of education at all levels from primary to tertiary, the beefing up of the system of transportation throughout the country, the departure from the dependence on crude oil to new areas of employment and wealth creation such as in agriculture and solid minerals and the assurance of security especially in Niger Delta zone of the country – all these will give this country a new lease of life never experienced before. This paper, therefore, contains analysis of the bone of contention of the -point agenda as enumerated by the president himself. Namely, power and energy, food security, wealth creation, transportation, land reform, education and security as epitomized in the Niger Delta situation. The purpose of this paper is to critically examine the issues involved in achieving the agenda, or otherwise, show the strengths and weaknesses of the various proposals, in relationship with the existing science and technology in this country at the moment, and finally draw conclusion and make recommendations. The science and technology available in this country has already produced very formidable manpower that can handle Nigeria’s current state of development. If, however, there are certain rare areas where suitable technology is not available, the country is rich enough to pay for technology transfer from outside. The re-branding of Nigeria now in progress, though not part of the 7-point agenda, has created excellent opportunities for smoothening the rough edges of the agenda and, hopefully, will act as icing sugar and finishing touches to it. Keywords: Science and technology, the 7-point agenda, development, Nigerian government and the masses.Item Estimation of the Calorific Value and Electrical Energy Potential of Waste Generated Biomass Within Abakaliki Meteropolis Ebonyi State, Nigeria(American Journal of Nano Research and Applications, 2020) Igbo, M. E; Chikeleze, P. C; Onyia, A.I; Igbo, N. E; Eze, C. N.; Chima, A.IAbstract: This study was conducted to determine the electrical energy potential of municipal solid waste (MSW) generated biomass within Abakaliki metropolis, Ebonyi State, Nigeria. The MSW samples were collected at two different points from each of the waste management zones, with each zone covering at least twelve (12) streets. It was then sorted into three major categories according to their constituents viz; metals, plastics and biomass. In this study, the biomass component of the MSW sample was is our focus. Thus, the biomass sample was sun dried and then ground into powdered form. It was thoroughly mixed, shredded, sieved and subsequently analysed at the Lorcin Technologies Port Harcourt, Nigeria. Currently, an average of 360 tons of MSW is generated within Abakaliki metropolis on daily bases. This translates to an electrical energy potential of approximately 320MW. The MSW-generated biomass analysis estimates the Gross Calorific Value (GCV) or Higher Heating Values (HHV) to be 11.644MJ/kg. This value which practically determines the electrical energy of the waste sample is highly suitable for many thermal conversion processe. This translate to the fact 0.925kg of biomass will generate electrical power of 1KWh. Hence, one unit of electricity=10765KJ/Kg/GVC (KJ/Kg).