A5019530920- Concrete and Cement Materials Research
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Innovative concrete reinforcement materials
- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Recycling and utilization of industrial and municipal waste in materials production
- Chalcogenide Semiconductor Thin Films
- Fluoride Effects and Removal
- TiO2 Photocatalysis and Solar Cells
- Rocket and propulsion systems research
- Groundwater and Isotope Geochemistry
- Therapeutic Uses of Natural Elements
- Microbial Applications in Construction Materials
- Catalytic Processes in Materials Science
- Biodiesel Production and Applications
- Phase-change materials and chalcogenides
- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Nanoparticles: synthesis and applications
- Grouting, Rheology, and Soil Mechanics
- Advanced Surface Polishing Techniques
Adama Science and Technology University
2020-2023
Pohang University of Science and Technology
2016-2018
Abstract Nowadays, water pollution is a major concern to the globe. For this reason, various research works has been done access pure thereby minimizing effect of pollutants. In work, cobalt doped ZnO (Co-doped ZnO) via accumulation ion onto Eichhornia crassipes plant tissue for different days and combined with zinc precursor was synthesized. The resulting catalyst powder samples were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-Ray...
Cracks in typical mortar constructions enhance water permeability and degrade ions into the structure, resulting decreased durability strength. In this study, samples are created that self-healed their cracks by precipitating calcium carbonate them. Bacillus subtilus bacterium (10-7, 10-9 cells/mL), lactate, fine aggregate, OPC-cement, water, bagasse ash were used to make self-healing samples. Calcium lactates prepared from discarded eggshells lactic acid reduce cost of mortars, 5% control...
In recent years, partial replacement of cement with bagasse ash has been given attention for construction application due to its pozzolanic characteristics. Sugarcane and fine particles are abundant byproducts the sugar industries disposed in landfills. Our study presents effect burning at different temperatures (300 °C 600 °C) on compressive strength physical properties ash-blended mortars. Experimental results have revealed that produced more amorphous silica very low carbon contents when...
Abstract Nowadays, modern metal industries have difficulty obtaining the required surface quality during machining. This is because various process parameters affect of surface. The aim study to examine and enhance impact cutting-speed, cutting-depth, feed rate dry turning AISI 1030 carbon steel experimentally numerically (by DEFORM 3D) get a better output response like minimal roughness, tool temperature, maximum MRR. Taguchi-based grey relational analysis optimization technique was used...
The need to make clean water accessible and affordable for low-income countries is crucial. This study examines the suitability of various clays Ceramic Pot Water Filters production groundwater treatment effective microbe fluoride removal. For this study, three were collected from different geographical locations in Ethiopia,i.e., Hosaenna Clay, Babawuha Leku Clay. Organic additives such as sawdust eragrostis tef husks used increase porosity Filters. Atterberg limit particle size...
Abstract In recent years, industrial byproducts have been converted into useful and valuable commercial items. Reusing these plays a crucial role to ensure the circular economy thereby safeguard environmental impacts. Ethiopia, Aluminate Sulphate chemical factory disposes of filter-cake waste materials in landfills that high silica content. The is using pure kaolin other raw for production Aluminum Sulphuric Acid by burning at temperatures. By-products were collected from then calcined...
Abstract The influence of electric field on the precipitation and optical properties PbSe quantum dots ( QD s) in borosilicate glasses was investigated. Diameters s increased as from 0.0 to 0.6 kV /mm even at same subsequent heat treatment 510°C for 2 hours. Increase 0.9 kV/mm caused red‐shift absorption photoluminescence PL ) bands s. Application also led decreases viscosities that accelerated diffusion ions; this phenomenon formation large resulted red‐shifts bands. temperature due Joule...
Abstract Optical properties of lead chalcogenide quantum dots (QDs) can be controlled by tuning its bandgaps. We prepared silicate glasses using the melt-quenching method and heat-treated 510 °C–540 °C for 10 h to precipitate transition metal ions into PbSe QDs. Transition metals oxide such as TiO, MnO & NiO were used in our experiment due relative ease incorporation Ti 2+ , Mn 2+, or Ni crystal structure lattice compared rare-earth ions. Emission spectra QDs tuned a wide wavelength...