Photocatalytic Remote Oxidation Induced by Visible Light
Photocatalytic Remote Oxidation Induced by Visible Light
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DOI：
10.1021/jp205600m
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发表时间：
2011-08
影响因子：
3.7
通讯作者：
Fei Yang;Yukina Takahashi;Nobuyuki Sakai;T. Tatsuma
中科院分区：
文献类型：
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作者：
Fei Yang;Yukina Takahashi;Nobuyuki Sakai;T. Tatsuma
使用 WO3 基光催化剂在可见光下检查光催化远程氧化：WO3、Pt 纳米粒子修饰的 WO3 (Pt–WO3) 和 Cu(II) 离子修饰的 WO3 (Cu(II)–WO3)。在可见光（≥420 nm，~100 mW cm-2）下，玻璃板上的烷基链与光催化剂被 7.5 μm 厚的空气隔开，在 40 分钟内被去除。在所检查的光催化剂中，Pt-WO3 表现出最高的远程氧化活性。在360-460 nm波长范围内其活性高于Pt纳米粒子修饰的TiO2。 Pt-WO3很可能在可见光下发射·OH，它在空气中扩散并攻击烷基链，而紫外光诱导的远程氧化的主要途径涉及H2O2的发射及其光裂解成·OH。通过使用可见光照射的 Pt-WO3，也可以在 Ni(OH)2 中远程存储氧化能量。
Photocatalytic remote oxidation was examined under visible light by using WO3-based photocatalysts: WO3, WO3 modified with Pt nanoparticles (Pt–WO3), and WO3 modified with Cu(II) ions (Cu(II)–WO3). Alkyl chains on a glass plate separated from the photocatalyst by 7.5 μm thick air were removed in 40 min under visible light (≥420 nm, ∼100 mW cm–2). Among the photocatalysts examined, Pt–WO3 exhibits the highest remote oxidation activity. Its activity is higher than that of TiO2 modified with Pt nanoparticles in the wavelength range 360–460 nm. It is likely that Pt–WO3 emits •OH under visible light, which diffuses in air and attacks alkyl chains, whereas the major path of the remote oxidation induced by UV light involves emission of H2O2 and its photocleavage into •OH. Remote storage of oxidative energy in Ni(OH)2 is also possible by using visible light-irradiated Pt–WO3.