Search results for "Phosphate ion"

showing 3 items of 3 documents

Phosphate ions detection by using an electrochemical sensor based on laser-scribed graphene oxide on paper

2023

In this work, electrodes based on laser-scribed reduced graphene oxide were fabricated using filter paper as the substrate. To fabricate the electrodes, a water suspension of graphene oxide was filtered to produce a continuous and uniform film of graphene oxide on the filter paper surface. Subsequently, a CO2 laser was used to "write" the working, counter and reference eelctroes by reducing graphene oxide in specific areas to define complete sensors. Referecnce electrodes were then coated with a commercial Ag/AgCl conductive paste to produce a quasi Ag/AgCl reference. As fabricated devices were employed as electrochemical sensors for detection of phosphate ions in water by employing the mol…

Settore ING-IND/23 - Chimica Fisica ApplicataGeneral Chemical EngineeringSettore ING-IND/17 - Impianti Industriali MeccaniciElectrochemistryPhosphate ions Electrochemical sensor Voltammetry Reduced graphene oxide Paper-based sensors Laser scribedSettore ING-INF/01 - Elettronica
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Study of the action of phosphate ions contained in the mixing water of the hydration of a Portland cement.

2005

Cementation is considered as the most attractive solution for the conditioning of low and intermediate radioactive wastes. The species contained in these wastes can strongly influence the reactivity of the cement pastes, it is in particular the case of the ortho-phosphate ions which are found in the evaporation concentrates. The aim of our work was to determine the influence of these ions on the hydration and the rheological properties of the cement pastes at early age as well as the mechanical and physical properties on the hardened material.

[CHIM.MATE] Chemical Sciences/Material chemistryions orthosphateorthophosphate ionsdimensional evolutionhydratationévolution dimensionnellemecanical propertiescement paste[ CHIM.MATE ] Chemical Sciences/Material chemistrypropriétés mécaniquesrheologyrhéologiehydrationpâte de ciment
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Electrochemical sensor for phosphate ions based on laser scriber reduced graphene oxide

2022

This preliminary work shows a new and innovative way to produce laser scribed reduced graphene oxide (LSGO) electrodes using different porous substrates (ranging from paper to plastic and fabric). The obtained electrodes were also tested as electrochemical sensors towards the detection of phosphate ions in water. To obtain the electrodes, a water suspension of GO was filtered on top of substrate (such as Whatman® filter paper) and a complete sensor was obtained from its reduction using a CO2 laser. The electrode is composed of working and counter electrodes made of LSGO and a reference electrode of a Ag/AgCl obtained by using a commercial AgCl conductive paste. Phosphate ions were detected …

voltammetrySettore ING-IND/23 - Chimica Fisica ApplicataElectrochemical sensorPhosphate ionSettore ING-IND/17 - Impianti Industriali MeccaniciVoltammetryPhosphate ionspaper based elecxtrodePaper based electrodesReduced graphene oxideEectrochemical sensorreduced graphene oxide2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)
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