Photocatalytic Activity of Cu2+-Grafted Metal-Doped ZnO Photocatalysts Under Visible-Light Irradiation
Photocatalytic Activity of Cu2+-Grafted Metal-Doped ZnO Photocatalysts Under Visible-Light Irradiation
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DOI：
10.5796/electrochemistry.79.842
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发表时间：
2011
期刊：
影响因子：
2.5
通讯作者：
S. Anandan;M. Miyauchi
中科院分区：
文献类型：
--
作者：
S. Anandan;M. Miyauchi
掺杂到ZnO中的金属离子在带隙之间形成不同的能态，例如浅、中或深杂质态，这些态引起可见光吸收。没有助催化剂的 MxZn1−xO 显示出可忽略不计的可见光活性。令人惊讶的是，Cu2+ 修饰诱导了 MxZn1−xO 的可见光活性，并且它们成为活性可见光光催化剂。实验结果得出结论，可见光活性很大程度上取决于掺杂剂杂质态的还原电位。
Metal ions doping into ZnO formed different energy states such as shallow, middle, or deep impurity states between the band gap and these states induce the visible-light absorption. MxZn1−xO without co-catalyst showed negligible visible-light activity. Surprisingly, Cu2+-modification induced visible-light activity over MxZn1−xO and they became an active visible-light photocatalyst. Experimental results conclude that visible-light-activities strongly depend on their reduction potentials of dopants' impurity states.