Context : The quality of the indoor air within buildings is a topic of major importance for public health. Among the numerous chemical compounds that can be found in indoor air, formaldehyde and BTEX (benzene, toluene, ethylbenzene and xylene) are considered as one of the most toxic volatile organic compounds (VOCs).
Objectif : In this context, the goal of this study is to develop and deeply characterize an in-situ micro-device able to identify and quantify these chemical compounds in indoor air. A silicon micro-preconcentrator, a silicon gas chromatographic micro-column and a semiconductor based chemiresistor gas sensor will compose this analytical micro-system.
The main contributions in this thesis concern on one hand the identification and characterization of suitable porous adsorbents allowing the concentration of indoor air pollutants and, on the other hand the synthesis of nano-structured metal oxides (SnO2) using an original deposition technique.
The aim of this PhD is to synthesize and characterize various materials (adsorbents and metal oxide materials) and then to evaluate the detection performances of the micro-device for the identification of indoor air pollutants such as formaldehyde and VOCs.
Candidates’profile : Skills in physical-chemistry, surface science, instrumentation, physical properties of nanostructures, semiconductors and structural characterization techniques.
Subject to be filled before the end of June 2018
Taking office from October 2018