Synthesis of Novel Nanophotocatalyst in Micro/Millifludic Supercritical Reactor

Abstract : This PhD thesis is part of a larger European ITN project (Photo4Future) dealing with improvement of the use of sun light for making valuable products through new heterogeneous catalytic photochemical processes. In this context, the synthesis of nanophotocatalysts is essential since their characteristics must be controlled to optimize the process efficiency towards the desired products. Supercritical fluids synthesis approaches (high pressure / high temperature) have proven to be promising for such developments. Combined to microreactors, it is then possible to reach a precise control of material properties, including surfaces. The objectives of this project are (i) to develop synthetic methods for designing new nanophotocatalysts based on titania and nitrides quantum dots, in particular GaN/TiO2 and GaxIn1-xN/TiO2, (ii) to test their photocatalytics efficiency on several model photochemical reactions (oxidation of thiols, trifluoromethylation and amine to imine conversion), both in batch mode and using continuous flow photochemical reactors and (iii) to investigate the scale-up options for increasing the production rates of such nanophotocatalysts.
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Prasaanth Ravi Anusuyadevi. Synthesis of Novel Nanophotocatalyst in Micro/Millifludic Supercritical Reactor. Catalysis. Université de Bordeaux, 2018. English. ⟨NNT : 2018BORD0345⟩. ⟨tel-02170508⟩

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