Conduction band energy level control of titanium dioxide: toward an efficient visible-light-sensitive photocatalyst.
Conduction band energy level control of titanium dioxide: toward an efficient visible-light-sensitive photocatalyst.
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DOI：
10.1021/ja101714s
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发表时间：
2010-04
影响因子：
15
通讯作者：
Huogen Yu;H. Irie;K. Hashimoto
中科院分区：
文献类型：
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作者：
Huogen Yu;H. Irie;K. Hashimoto
设计并合成了一种新型可见光敏感型TiO2光催化剂，该催化剂采用导带正移的方法缩小了TiO2的带隙，并利用光生Cu2+对氧还原的催化活性。在可见光照射下，Cu(II)/Ti(1-3x)W(X)Ga(2x)O(2)光催化剂具有较高的催化活性。事实上，它在可见光(>；400 nm)下通过丙酮将异丙醇分解为CO(2)，量子效率高达13%。该反应的转化率超过22，表明该反应具有催化作用。
Through the use of a strategy that involves narrowing the TiO(2) band gap by shifting its conduction band positively and utilizing the catalytic activity of photoproduced Cu(I) for oxygen reduction, a novel visible-light-sensitive TiO(2) photocatalyst, Cu(II)-grafted Ti(1-3x)W(x)Ga(2x)O(2), was designed and synthesized. The Cu(II)/Ti(1-3x)W(x)Ga(2x)O(2) photocatalyst produced high activity under visible-light irradiation. In fact, it decomposed 2-propanol to CO(2) via acetone under visible light (>400 nm) with a high quantum efficiency of 13%. The turnover number for this reaction exceeded 22, indicating that it functioned catalytically.