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PublicationAssessment of sludge-based microbial fuel cell performance via electrochemical impedance spectroscopy(Springer, 2023-06)The effective, non-destructive method known as electrochemical impedance spectroscopy (EIS) can be a useful supplement to the methods currently being used to examine microbial fuel cells (MFCs). Its use in MFC research should be investigated further, such as in the examination of MFC internal resistance, electrode materials, catalyst coatings on electrodes and growth of biofilms. Specifically, this chapter details the application of EIS in comprehending electro-chemical processes involved in sludge-based MFC, the biological and/or abiotic variables that restrict power production, with the goal of comprehending and overcoming them.
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PublicationMechanical performance of natural fiber-reinforced alkali-activated composites(Elsevier, 2023)Alkali-activated material exhibits brittle behavior with low tensile strength and is sensitive to cracking which also affect the durability of the structures. To address this issue, alkali-activated material is frequently made into alkali-activated composites (AACs) by using by fiber reinforcement. Natural fibers have a number of advantages, including lightweight, high strength, and safety in use and processing compared to synthetic fiber. The developed natural fiber-reinforced cementitious composites exhibit outstanding flexural, fracture, and impact resistance. However, the chemical incompatibility that may exist between cement and fiber is the main problem for natural fiber-reinforced cement composites. The pyrolytic behavior of natural fibers can be viewed as a multiconditional coupling in a cement-based environment with high alkalinity and a large variety of mineral species. Thus this review provides in depth analysis on the diverse natural fiber and its utilization in the development of fiber-reinforced AACs (FRAACs). Hence, this would guide in finding the best fiber source for the development of high mechanical strength FRAAC to meet building and construction application.
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PublicationA review on the effect of extrusion parameter on 3D printing filament diameter(Springer, 2023)Over the years, the extrusion technique has captured the attention of polymer industries by meeting the demand for polymer processing and fabrication of final products. Extrusion is a continuous process, and it has a lot of potential in the increasing polymer sector, especially in the three-dimensional (3D) printing sector. 3D printing is popular because the feedstock filament form is accessible and produce able. The properties of the filament used influence the printed part qualities regardless of the FDM parameters. This study provides information on how extrusion parameters affect the diameter of extruded filaments. This study reviews previous studies on the effect of varied extrusion settings on filament diameter. The review will serve as a resource for researchers in the 3D printing sector to fabricate their filaments for 3D printing. Overall, this paper will provide solutions to overcome issues in obtaining optimal filament diameters for future research projects.
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PublicationOrganic electrochemical transistor-based advanced biosensor for clinical diagnosis(Elsevier, 2023)The growing discipline of bioelectronics, which combines the fields of biology with electronics, has enormous promise for the creation of cutting-edge biomedical devices for therapeutic and diagnostic purposes. The use of organic electronic materials provides an ideal biointerface due to their reported biocompatibility, and mechanical matching between the sensor element and the biological environment. Organic electronic devices are particularly promising in this regard. The organic electrochemical transistor (OECT) is one potential technology among such devices. The ability of an OECT to provide local amplification and serve as a high-fidelity transducer of biological processes may be its most crucial attribute. The OECT also incorporates traits and qualities that can be adjusted for a variety of biological purposes. In this chapter, we discuss how the OECT's development was framed in relation to the underlying optimization for a number of applications, such as ion sensing, enzyme sensing, and electrophysiology. These uses have facilitated the development of functional OECTs that can characterize tissue, monitor the function of entire organs, and detect local ionic/biomolecular and single cell activity. The corpus of work discussed here shows that the OECT is a very adaptable tool that becomes a key factor in clinical diagnostics.
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PublicationThe properties of crumb rubber loading on fly ash based geopolymer mortar(Springer Nature, 2023)By replacing traditional Portland cement (OPC) with crumb rubber in fly ash-based geopolymer mortar, waste tyre disposal and natural mineral aggregate use can be reduced, resulting in lower CO2 emissions. Crumb rubber geopolymer mortar is formed when sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) are mixed with fly ash (class F) to make aluminosilicate gel. All of the fly ash geopolymer preparations followed the same ratio of solid to liquid (2:1) and the same ratio of NaOH solution (12M) to Na2SiO3 solution (2.5). Different amounts of crumb rubber (0%, 5%, 10%, 15%, and 20% by weight of solid) were added to the mixture. The results show that the compressive strength of the geopolymer mortar decreased with increasing crumb rubber loading. The results of the analysis show that the compressive strengths of CR-0%, CR-5%, CR-10%, CR-15%, and CR-20% are 25,59,14,31,11.19,10.38, and 8.16 MPa. The strength is diminished because of inadequate interfacial adhesion between the crumb rubber and geopolymer paste. As the sample weight fell, the percentage of crumb rubber in the geopolymer mortar in-creased, but the density decreased.