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Science de surface et propriétés chimiques d'hétérostructures NiO/TiO2 monocristallin

Abstract : TiO2 photocatalysts have attracted attention as a sustainable method for water/air purification and hydrogen production by water splitting. An advantageous strategy is the development of heterostructures by coupling metal oxides to create a p-n junction at their interface in order to prevent there combination by vectorial charge carrier separation at these energy junctions. In addition, crystal facets play a decisive role in the trapping of charge carriers and thus photocatalytic redox reactions. Thus, selective deposition of metal or metal oxides onto specific facets would enhance the photocatalytic activity by improving charge separation. In this work, we have combined the usage of p-type NiO co-catalyst to form p-n junction with its selective deposition onto the specific facet of oriented TiO2nanocrystal photocatalysts. Furthermore, the physical model experiments have been performed to investigate the electronic properties of these heterojunctions.
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Shun Kashiwaya. Science de surface et propriétés chimiques d'hétérostructures NiO/TiO2 monocristallin. Chimie théorique et/ou physique. Université de Bordeaux; Technische Universität (Darmstadt, Allemagne), 2018. Français. ⟨NNT : 2018BORD0241⟩. ⟨tel-02128649⟩

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