Photodeposition of metal and metal oxide at the TiOx nanosheet to observe the photocatalytic active site
Photodeposition of metal and metal oxide at the TiOx nanosheet to observe the photocatalytic active site
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DOI：
10.1021/jp804625r
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发表时间：
2008-08-07
影响因子：
3.7
通讯作者：
Inoue, Taishi
中科院分区：
文献类型：
--
作者：
Matsumoto, Yasumichi;Ida, Shintaro;Inoue, Taishi
Ag、Cu、Cu 2 O和MnO 2在具有纤铁矿型结构的TiOx纳米片上的光沉积。以K0.8Ti1.73Li0.27O4为催化剂，在紫外光照射下，观察其光催化活性中心。Ag、Cu和Cu 2 O的光沉积，即光还原，主要发生在纳米片的横向方向的边缘处，表明光产生的电子在纳米片中的Ti 4+离子的网络中移动。另一方面，MnO 2的光沉积，即光氧化，发生在整个纳米片的表面上，表明光生空穴存在于纳米片表面的O2-离子处。
Photodeposition of Ag, Cu, Cu2O, and MnO2 at a TiOx nanosheet with a lepidocrocite-type structum. prepared from K0.8Ti1.73Li0.27O4 was carried out to observe the active sites for the photocatalytic reaction (luring UV illumination. Photodepositions of Ag, Cu, and Cu2O, that is, photoreduction, occurred mainly at edges in the lateral direction of the nanosheet, indicating that the photoproduced electron moves in the network of Ti4+ ions in the nanosheet. On the other hand, photodeposition of MnO2, that is, photooxidation, occurred on all over the surface of the nanosheet, indicating that the photoproduced hole exists at the O2- ion of the nanosheet surface.