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Hubert Girault

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Publications associées (430)

Iohexol degradation in wastewater and urine by UV-based Advanced Oxidation Processes (AOPs): Process modeling and by-products identification

Hubert Girault, César Pulgarin, Simon Schindelholz, Natalia Gasilova, Stefanos Giannakis, Miquel Pastor Gelabert, Milica Jovic

In this work, an Iodinated Contrast Medium (ICM), Iohexol, was subjected to treatment by 3 Advanced Oxidation Processes (AOPs) (UV, UV/H2O2, UV/H2O2/Fe2+). Water, wastewater and urine were spiked with Iohexol, in order to investigate the treatment efficien ...

Elsevier2017

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Hubert Girault, Alejandro Nicolás Colli

A compact, fast and general algorithm based on Dirichlet boundary conditions for the potential field is derived to enable the calculation of local current distribution, shunt currents and the local potential distribution on massive electrodes in electroche ...

2017

Photoproduction of Hydrogen by Decamethylruthenocene Combined with Electrochemical Recycling

Hubert Girault, Laurent Alexis Clément Vannay, Manuel Alejandro Méndez Agudelo, Grégoire Clément Gschwend, Micheal Diarmaid Scanlon, Pekka Eero Peljo, Lucie Josette Renée Rivier

The photoinduced hydrogen evolution reaction (HER) by decamethylruthenocene, Cp2RuII (Cp=C5Me5), is reported. The use of a metallocene to photoproduce hydrogen is presented as an alternative strategy to reduce protons without involving an additional phot ...

Wiley-Blackwell2017

Redox Solid Energy Boosters for Flow Batteries: Polyaniline as a Case Study

Hubert Girault, Véronique Amstutz, Heron Vrubel, Pekka Eero Peljo, Christopher Raymond Dennison, Alberto Battistel, Elena Zanzola

In this work, the viability of polyaniline as a solid charge storage material in an aqueous redox-mediated flow battery is investigated. Fe(III/II) and V(IV/III) were identified as potential redox mediators to target the emeraldine-pernigraniline and leuco ...

Elsevier2017

Electrostatic spray ionization from 384-well microtiter plates for mass spectrometry analysis based enzyme assay and drug metabolism screening

Hubert Girault, Liang Qiao, Elena Tobolkina, Tzu-En Lin, Xiaoqin Zhong, Yan Deng, Emna Belghith

We have realized the direct ionization of samples from wells of microtiter plates under atmospheric conditions for mass spectrometry analysis without any liquid delivery system or any additional interface. The microtiter plate is a commercially available 3 ...

American Chemical Society2017

Inkjet-printed microtiter plates for portable electrochemical immunoassays

Hubert Girault, Frédéric Gumy, Fernando Cortes Salazar, Andreas Stephan Lesch, Alexandra Bondarenko, Yingdi Zhu, Milica Jovic

Herein, we present the large-scale fabrication of multiplexed three-electrode sensors used in a point-of-care device platform that couples a magnetic bead-based immunoassay strategy with amperometric detection for rapid and highly sensitive analysis. The m ...

Elsevier Science Sa2017

Weiche elektrochemische Sonden zum Abbilden der Verteilung von Biomarkern und injizierten Nanomaterialien in tierischem und menschlichem Gewebe

Hubert Girault, Horst Pick, Yu Lu, Andreas Stephan Lesch, Tzu-En Lin

Die Untersuchung von Biomarkern und injizierten theranostischen Nanomaterialien in Geweben und Organen spielt eine zentrale Rolle bei zahlreichen medizinischen Verfahren von der Krebsdiagnose bis hin zur Arzneimittelverabreichung. Zu diesem Zweck kann die ...

Wiley-Blackwell2017

The antioxidant capacity of erythrocyte concentrates is increased during the first week of storage and correlated with the uric acid level

Hubert Girault, Michel Prudent, Niels Erik Lion, Fernando Cortes Salazar, Manon Sandra Bardyn, Sunny Isaïe Maye, Andreas Stephan Lesch

Background and Objectives: Red blood cells (RBCs) suffer from lesions during cold storage, depending in part on their ability to counterbalance oxidative stress by activating their antioxidant defence. The aim of this study was to monitor the antioxidant p ...

Wiley-Blackwell2017

Solar photo-Fenton and UV/H2O2 processes against the antidepressant Venlafaxine in urban wastewaters and human urine. Intermediates formation and biodegradability assessment

Luiz Felippe De Alencastro, Hubert Girault, Dominique Grandjean, César Pulgarin, Idriss Hendaoui, Stefanos Giannakis, Milica Jovic

In this work, the use of Advanced Oxidation Processes (AOPs) against the degradation of an emerging contaminant has been subjected under systematic investigation. The optimization of treatment of the anti- depressant drug Venlafaxine (VFA) was performed, u ...

Elsevier Science Sa2017

Mapping the antioxidant activity of apple peels with soft probe scanning electrochemical microscopy

Hubert Girault, Andreas Stephan Lesch, Tzu-En Lin

We present a non-invasive electrochemical strategy for mapping the antioxidant (AO) activity of apple peels, which counterbalances oxidative stress caused by various external effectors. Soft carbon microelectrodes were used for soft probe scanning electroc ...

Elsevier Science Sa2017

Mediated water electrolysis in biphasic systems

Hubert Girault, Heron Vrubel, Micheal Diarmaid Scanlon, Pekka Eero Peljo, Lucie Josette Renée Rivier

The concept of efficient electrolysis by linking photoelectrochemical biphasic H2 evolution and water oxidation processes in the cathodic and anodic compartments of an H-cell, respectively, is introduced. Overpotentials at the cathode and anode are minimis ...

Royal Society of Chemistry2017

Soft Electrochemical Probes for Mapping the Distribution of Biomarkers and Injected Nanomaterials in Animal and Human Tissues

Hubert Girault, Horst Pick, Yu Lu, Andreas Stephan Lesch, Tzu-En Lin

Monitoring biomarkers and injected theranostic nanomaterials in tissues and organs plays a pivotal role in numerous medical applications ranging from cancer diagnostics to drug delivery. Scanning electrochemical microscopy has been demonstrated as a powerf ...

Wiley-Blackwell2017

Variation of the Fermi level and the Electrostatic Force of a Metallic Nanoparticle upon Colliding with an Electrode

Hubert Girault, Pekka Eero Peljo

When a metallic nanoparticle (NP) comes in close contact with an electrode, its Fermi level equilibrates with that of the electrode if their separation is less than the cut-off distance for electron tunnelling. In the absence of chemical reactions in solut ...

Royal Soc Chemistry2017

Monitoring Tyrosinase Expression in Non-metastatic and Metastatic Melanoma Tissues by Scanning Electrochemical Microscopy

Hubert Girault, Horst Pick, Fernando Cortes Salazar, Andreas Stephan Lesch, Alexandra Bondarenko, Tzu-En Lin

Although tremendous progress has been made in the diagnosis of melanoma, the identification of different stages of malignancy in a reliable way remains challenging. Current strategies rely on optical monitoring of the concentration and spatial distribution ...

Wiley-Blackwell2016

Sensitive and fast identification of bacteria in blood samples by immunoaffinity mass spectrometry for quick BSI diagnosis

Hubert Girault, Horst Pick, Michel Prudent, Niels Erik Lion, Liang Qiao, Natalia Gasilova, Alexandra Bondarenko, Yingdi Zhu

Bloodstream infections rank among the most serious causes of morbidity and mortality in hospitalized patients, partly due to the long period (up to one week) required for clinical diagnosis. In this work, we have developed a sensitive method to quickly and ...

Royal Soc Chemistry2016

H2O2 generation at carbon paste electrode with decamethylferrocene solution in 2-nitrophenyloctyl ether as a binder. The catalytic effect of MoS2 particles

Hubert Girault

Here, we report hydrogen peroxide generation at 2-nitrophenyloctyl ether (NPOE)-water interface with decamethylferrocene as an electron donor. The progress of this reaction was detected by the observation of color change of the organic and aqueous phases i ...

Wiley-V C H Verlag Gmbh2016

On-chip mesoporous functionalized magnetic microspheres for protein sequencing by extended bottom-up mass spectrometry

Hubert Girault, Yury Tsybin, Liang Qiao, Natalia Gasilova, Kristina Srzentic

Limited amount and extreme concentration variability of proteomic-related samples require efficient analyte preconcentration and purification prior to the mass spectrometry (MS)-based analysis. Preferably, these steps should be coupled on-line with chosen ...

American Chemical Society2016

Fixation and Permeabilization Approaches for Scanning Electrochemical Microscopy of Living Cells

Hubert Girault, Horst Pick, Fernando Cortes Salazar, Andreas Stephan Lesch, Alexandra Bondarenko, Petar Stupar, Tzu-En Lin

Scanning electrochemical microscopy (SECM) has been widely used for the electrochemical imaging of dynamic topographical and metabolic changes in alive adherent mammalian cells. However, extracting intracellular information by SECM is challenging, since it ...

American Chemical Society2016

Heterogeneous versus homogeneous electron transfer reactions at liquid–liquid interfaces: The wrong question?

Hubert Girault, Pekka Eero Peljo, Evgeny Smirnov

Functionalization of a soft or liquid-liquid interface by a one gold nanoparticle thick “nanofilm” provides a conductive pathway to facilitate interfacial electron transfer from a lipophilic electron donor to a hydrophilic electron acceptor in a process kn ...

Elsevier Science Sa2016

Boosting Water Oxidation Layer-by-Layer

Hubert Girault, Véronique Amstutz, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Micheal Diarmaid Scanlon, Jonnathan Cesar Hidalgo Acosta

Electrocatalysis of water oxidation was achieved using fluorinated tin oxide (FTO) electrodes modified with layer-by-layer deposited films consisting of bilayers of negatively charged citrate-stabilized IrO2 NPs and positively charged poly(diallyldimethyla ...

Royal Society of Chemistry2016

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