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首页> 外文期刊>Chemical Physics Letters >PROPERTIES OF PHOTOCATALYSTS WITH TUNNEL STRUCTURES - FORMATION OF A SURFACE LATTICE O- RADICAL BY THE UV IRRADIATION OF BATI4O9 WITH A PENTAGONAL-PRISM TUNNEL STRUCTURE
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PROPERTIES OF PHOTOCATALYSTS WITH TUNNEL STRUCTURES - FORMATION OF A SURFACE LATTICE O- RADICAL BY THE UV IRRADIATION OF BATI4O9 WITH A PENTAGONAL-PRISM TUNNEL STRUCTURE

机译:具有隧道结构的光催化剂的性质-用五角棱镜隧道结构对Bati4O9的紫外辐照形成表面晶格自由基。

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摘要

The UV irradiation of barium tetratitanate, BaTi4O9, with a unique pentagonal-prism tunnel structure, produced an EPR signal with g = 2.018 and g = 2.004 at 77 K: the signal had a short lifetime in vacuum, whereas it was stable in the presence of gaseous molecules (O-2, H-2, He, Ar) independently of the kinds of gases. The radical reacted with gaseous oxygen and formed O-3(-) at room temperature. The species is assigned to an O- radical resulting from lattice oxygen at the surface, and its formation is closely related to the distorted TiO6 octahedra forming the tunnel. [References: 8]
机译:具有独特的五角棱镜隧道结构的四钛酸钡BaTi4O9的紫外线照射在77 K时产生g = 2.018和g = 2.004的EPR信号:该信号在真空中的寿命很短,但在存在下是稳定的气体分子(O-2,H-2,He,Ar)的分布与气体种类无关。自由基在室温下与气态氧反应并形成O-3(-)。该物质被分配到由表面晶格氧产生的O自由基,其形成与畸变的TiO6八面体形成隧道紧密相关。 [参考:8]

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