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Portail > Offres > Offre UMR7361-GERCHA-003 - Chercheur(euse) post-doctorant(e) (H/F) en chimie des matériaux pour l'adsorption de polluants de type NOx

Post-doctoral researcher (M/F) in materials chemistry for the adsorption of NOx-type pollutants

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : mardi 16 août 2022

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General information

Reference : UMR7361-GERCHA-003
Workplace : MULHOUSE
Date of publication : Tuesday, July 26, 2022
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 October 2022
Proportion of work : Full time
Remuneration : 2690.43 euros gross monthly salary
Desired level of education : PhD
Experience required : 1 to 4 years

Missions

Air quality control is becoming a major issue for our society nowadays. There is a wide range of hazardous pollutants, such as nitrogen oxides (NOx), carbon oxides (COx), ozone (O3), sulfur oxides (SOX) and various volatile organic compounds (VOCs) whose levels must be significantly reduced to improve air quality [1, 2]. These toxic chemicals cause serious health problems (lung disorders, infections and cancer) and lead to more half a million deaths each year in Europe (50,000 in France). Humans, spending more than 80% of their life indoors (where pollutant levels are generally estimated to be 5 to 10 times higher than those in outdoor air [3]), are particularly exposed to typical indoor pollutants such as NOx, CO and VOCs. More specifically, NOx along with nitrogen monoxide and dioxide (NO and NO2) are emitted massively by engines in a confined working environment, without ventilation or exhaust treatment, and cause major health and safety problems. In France, nearly 800,000 workers are exposed to very toxic NOx emissions [4]. Thus, the European Union, with EU directive 2017/164 [5], has set exposure limit values for 8 hours at 2 and 0.5 ppm for NO and NO2, respectively. Therefore, it appears necessary to develop new technologies for reaching these limits or even lower levels and, consequently, to improve the health and safety of workers in confined workplaces considerably.
The NOA project of the National Research Agency, in which the research activities are integrated, aims to develop a transportable device, which can be placed on the exhaust of vehicles, to capture NOx using suitable adsorbents. Zeolites and MOFs (Metal-Organic Frameworks), as microporous adsorbents and thanks to their specificities (kinetics and absorption capacities, selectivity, regeneration) appear very promising for this kind of application. After a prospective simulation-based study conducted by project partners, the microporous materials identified as the most promising will be synthesized within the axis Materials with Controlled Porosity of the Institute of Materials Science in Mulhouse (IS2M). These preparations will aim at the preparation of powders which will be analyzed by a large panel of characterization techniques. The physicochemical characterizations will relate to the structure (X-ray diffraction, solid state NMR…) as well as the morphology and chemical composition (scanning electron microscopy, EDX mapping, X-ray fluorescence, solid state NMR liquid, thermogravimetric analysis). All these characterizations will be performed on ISO9001 certified measuring instruments. In addition, in order to avoid limitations in the diffusion and pressure drops in the targeted application, the adsorbents identified as the most efficient in terms of capacity, selectivity, stability and regeneration after adsorption tests and modeling studies carried out by other partners, will be shaped as extrudates and/or pellets. This activity will be the second part of the work and will be based on the expertise of the axis in the shaping of zeolites in the form of beads [6], pellets [7], films [8] and membranes [9].
[1] K. Straif et al., IARC Scientific Publication no. 161, Air Pollution and Cancer
[2] S. Gligorovski et al., Science, 2018, 359, 6376, 632
[3] W. Jedrychowski et al., Environ. Res., 2009, 109, 4, 447
[4] B. Courtois et al., INRS HST - 2005 - ND 2239-201-05, Moteurs diesel et pollution en espace confiné
[5] Directive UE 2017/164
[6] G. Rioland et al., RSC Adv., 2016, 6, 3, 2470
[7] G. Rioland et al., Microporous Mesoporous Mater., 2016, 221, 167
[8] N. Laudriant et al., Microporous Mesoporous Mater., 2013, 172, 36
[9] A. Said et al., J. Cryst. Growth, 2015, 428, 71

Activities

As main tasks:
- Synthesis of zeolitic and MOF-type materials by solvothermal or hydrothermal route, or even others.
- Physicochemical characterizations of these materials (structure, porosity, morphology)
- Shaping of adsorbents
- Analysis and interpretation of results
- Communications and discussions internally and at consortium level of the results
- Promotion of work in the form of publications, patents, posters and oral communications.
As secondary tasks:
- Involvement in the life of the team and the laboratory
- Supervision of trainees.

Skills

PhD in chemistry with a strong specialization in solid-state chemistry, materials chemistry, inorganic / mineral chemistry or physical chemistry is strongly recommended.
Teamwork, easy and efficient communication, dynamism, autonomy, ability to synthesize, scientific curiosity, writing and interpersonal skills are the expected personal skills of the candidate

Work Context

The Mulhouse Institute of Materials Science (IS2M) is a joint research unit under the joint supervision of the CNRS and the University of Haute Alsace (UMR 7361). IS2M is a multidisciplinary laboratory of nearly 160 people: researchers and teacher-researchers, doctoral and post-doctoral students, technical and administrative staff. The scientific and multidisciplinary activity of the Institute covers a wide field related to materials and aims at the development of innovative processes and processes of synthesis, shaping, functionalization, the development of characterization methods, the study of interactions mechanisms between a surface and its environment and the study of correlations of properties at different scales.
The work will be carried out within the Controlled Porosity Materials axis of IS2M, recognized internationally for the synthesis, characterization, shaping and applications of inorganic and hybrid porous materials.
The recruited person (M/F) will work within the framework of a collaboration based on skills in terms of experimentation, processes and simulation with INRS (Vandoeuvre-lès-Nancy), ICG (Montpellier), the LPCT (Nancy) and the LRGP (Nancy). This work is part of the ANR NOA project between the 5 partners mentioned above.

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