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Jul 01, 2026Open Access
Corn husk, one of the most abundantly generated by-products of maize processing, is routinely discarded through open dumping or burning in many communities especially in Africa, contributing to environmental pollution and the loss of potentially valuable biomass. In this study cellulose was extracted corn husk using two green methods. The extraction involved de-waxing, pretreatment and bleaching. Fourier Transform Infrared Spectroscopy (FTIR) was employed to confirm the chemical identity and con...
Jan 22, 2026Open Access
The development of low-cost and environmentally friendly solar cell technologies has attracted significant attention as an alternative to traditional silicon-based devices. Carbon dots (CD s), owing to their tunable optical band gap, strong absorption in the visible spectrum, and excellent electron-donating properties, have emerged as promising sensitizers and interfacial modifiers in solar energy conversion systems. In this study, we present a systematic investigation of CD s...
Mar 01, 2024Open Access
In a previous study, we developed a low density inorganic polymer based on industrial minerals and waste designed for in situ applications in the construction sector. In this paper, further testing and development of this new screed with thermal insulation and fire resistance properties is presented. The large scale tests of in situ production and fire-resistant properties are also discussed. The newly developed material succeeded at large scale fire test under the RABT-ZTV (ca...
Jan 31, 2024Open Access
In this study thermal treated bauxite residue is used to produce inorganic polymer building material with fire resistant properties. The calcined bauxite residue from the EAF furnace of Mytilineos was mixed with alkaline solution and casted to cure. The inorganic polymer material was tested for its fire resistant properties and pass all criteria of ISO 834 fire temperature curve.
Jan 31, 2024Open Access
In this study thermal treatment of bauxite residue is studied to produce two economic viable products: pig iron and inorganic polymer building material with fire resistant properties. The first campaign was successfully completed in the EAF 1 MW in Mytilineos plant, Ag. Nikolaos. The pyrometallurgical BR slag produced, was then used for the production of geopolymer fire resistant products.
Nov 24, 2023Open Access
The development of a Feslag based geopolymer and its use is further examined. The developed geopolymer is used as a filler in paints, varnishes and plasters. The physical and thermal properties of those products are measured. It is shown that the materials present adequate mechanical strength, physical and thermal properties. All developed materials were subjected to thermal loading with the modification of a standardized passive fire protection test. The plaster succeeded to the test without f...
Oct 31, 2023Open Access
The development of a Fe-based geopolymer and its performance under thermal loading is examined. The geopolymer is developed by mixing industrial waste with a highly alkaline activator, KOH, in the aqueous phase. The mechanical, physical and thermal properties and their respective variation with time are measured. It is shown that the material presents adequate mechanical strength and excellent physical and thermal properties. Then, the geopolymer material is subjected to thermal loading with the...
Jul 31, 2023Open Access
With the increase of energy price, the retrofitting of existing buildings with innovative insulation materials remains a key issue. Although a variety of insulation materials there is always a need for the development of new materials with improved thermophysical properties and low cost. Inorganic polymer materials are promising from this point of view. They are incombustible combining excellent physical and thermal properties with low production cost and significant environmental benefits. In t...
Apr 28, 2023Open Access
Diclofenac (DCF) is a non-steroidal anti-inflammatory drug (NSAID) used to relieve pain in joint-related diseases. It is not completely metabolized after consumption and cannot be easily removed using conventional wastewater treatment. DCF has been detected in water bodies and may pose chronic effects on the endocrines of living organisms even at low-level exposure. Heterogeneous photocatalysis provides an alternative and efficient method of degrading DCF. In this study, the photocatalytic remov...
Mar 31, 2023Open Access
In the current study, pristine multiwalled carbon nanotubes (p-MWCNTs) were functionalized by HNO 3 for introducing carboxyl functional group on the MWCNTs surface by which hydroxyapatite (HAP) molecules were grafted onto the surface of functionalized multiwalled carbon nanotubes (f-MWCNTs) with strong interfacial bonding. HAP-fMWCNTs-Cobalt ferrite composites were synthesized successfully by the homogenous mixture method. XRD analysis revealed that crystalline peaks of the HAP-f-MWCNT...
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