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Mechanical properties of pultruded GFRP profiles under seawater sea sand concrete environment coupled with UV radiation and moisture
, Article Construction and Building Materials ; Volume 258 , 2020 ; Zhao, X. L ; Jafari, A ; Ashrafi, H ; Bai, Y ; Singh Raman, R. K ; Khezrzadeh, H ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In this research, the mechanical properties of various glass fibre reinforced polymer (GFRP) pultruded profiles exposed to seawater sea sand concrete (SWSSC) and its combination with UV radiation and water vapour condensation were studied. The effect of different conditions, duration of conditioning, and the profile cross-section configuration on the mechanical properties were investigated. Three-point bending, tension, and compression tests were carried out to obtain the mechanical properties, including flexural, tensile and compressive strengths and tensile elastic modulus. Furthermore, in order to scrutiny the mechanisms and extent of damage, scanning electron microscopy (SEM) was carried...
Facile and ultra-sensitive voltammetric electrodetection of Hg2+in aqueous media using electrodeposited AuPtNPs/ITO
, Article Analytical Methods ; Volume 13, Issue 24 , 2021 , Pages 2688-2700 ; 17599660 (ISSN) ; Siavash Moakhar, R ; Sharifi Abdar, P ; Zargarnezhad, H ; Shone, M ; Rahmani, A. R ; Moradi, N ; Niksefat, V ; Shayar Bahadori, K ; Dolati, A ; Sharif University of Technology
Royal Society of Chemistry
2021
Abstract
In this study, we have investigated the use of electrodeposited Au-Pt nanoparticles (AuPtNPs) on indium tin oxide (ITO) for the detection of Hg2+ heavy ions in water samples. The mechanism of AuPtNP electrocrystallization on ITO glass in an aqueous solution containing 0.5 mM HAuCl4 + 0.5 mM H2PtCl6 is described for the first time. The nucleation mechanism of monometallic AuNPs on ITO was found to be progressive; however, a transition from progressive to instantaneous was observed for bimetallic AuPtNPs at elevated overpotentials. The modified ITOs were then assessed for the electrodetection of Hg2+ in aqueous media. It was shown by differential pulse voltammetry (DPV) that the sensitivity of...