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Reference : UMR8502-ERWPAI-002
Workplace : ORSAY
Date of publication : Wednesday, June 9, 2021
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 October 2021
Proportion of work : Full time
Remuneration : between 2700 et 3100 € gross monthly depending on the experience
Desired level of education : PhD
Experience required : Indifferent
Nanotubes have been recognized as an ideal one-dimensional (1D) nano-platform appealing applications among others for energy conversion or as catalytic nanoreactors. In parallel, the concept of selective photocatalytic sites has begun to receive attention with the development of photoactive 2D and 3D nanostructures, with permanent polarization and efficient electron-hole separation. Here we propose to use polarized imogolite nanotubes (INT) to investigate selective photocatalytic reaction in one-dimensional channels, a largely unexplored topic yet. The permanent dipole density at the walls of INTs results in an electronegative cavity and an electropositive outer surface, which will provide a platform of selective reactions localized separately. However, no one has investigated the potential of these nanotubes for photocatalysis up to now.
The aim of this postdoctoral fellowship will be to develop novel modified porous nanoreactors by increasing the permanent polarization of INTs. The most promising photoactive nanoreactors will be determined by a characterization coupling electronic microscopy observations with X-ray scattering, X-ray fluorescence and Infra-Red experiments. The potential of these nanostructures will be explored both for photocatalytic degradation of pollutants and for the production of valuable fuels. In addition, we will investigated the dynamics of the photogenerated charge-carriers under UV-vis-NIR excitation and their lifetime regarding the coupling with co-catalysts or the polarization tuning.
The candidate must have a PhD in materials science with experiences in synthesis chemistry and, possibly, an expertise in photochemistry. He/she should be highly motivated by experimentation and should possess organizational skills as well as the ability to work both independently and as part of a team. You have a PhD degree in physical chemistry, materials science, photoelectrochemistry, or similar field with strong hands-on experience in material synthesis and photophysical properties characterization. In-depth experience in photoelectrochemistry is advantageous. The work requires high level of experimental skills to operate sophisticated machines, analytical mindset for interpreting measured data and innovative experiments. You are a team player and your strengths include taking personal responsibility, high motivation for the innovation, excellence and flexibility to work and deliver results. Good communication skills in English are required, while the knowledge of French is not mandatory. Desired skills: Experience in hydrothermal synthesis, nanoparticle synthesis, experience in (photo)electrochemical characterizations are highly desirable, skills in time-resolved spectroscopy such as photoluminescence and/or transient absorbance. Experience with structural and textural characterization methods (FTIR, UV-visible, X-ray scattering/diffraction…).
We offer a postdoc position for two years at the research institution with excellent infrastructure and broad interdisciplinary surroundings with plenty of possibilities for personal and professional development. The postdoc will be co-supervised by Erwan Paineau (Laboratoire de Physique des Solides, UMR 8502 CNRS) and Mohamed Nawfal Ghazzal (Institut de Chimie Physique, UMR 8000 CNRS) at University of Paris-Saclay. Over the duration of the contract, the candidate will be involved in conducting experiments on both laboratories and on large facilities(synchrotron, laser).
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