| CuO-NiO助催化剂对TiO2(P25)光催化活性的影响 |
| Effect of CuO-NiO as Co-catalyst on Photocatalytic Activity of TiO2(P25) |
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| 摘要: 采用简单的浸渍和化学热解的方法合成了CuO、NiO分别负载及共负载的TiO2(Degussa，P25)光催化剂CuO/P25、NiO/P25和CuO-NiO/P25。通过在紫外光下催化降解甲基橙，发现单独负载CuO能提高P25的光催化降解效率，单独负载NiO却降低了P25的光催化活性，而CuO和NiO共负载的P25体系(0.5%CuO-0.1%NiO/P25)的光催化降解效率比0.5%CuO/P25、0.1%NiO/P25、P25分别提高了近8%、17%、15%。实验结果说明：CuO能够有效地分离和累积光生电子从而提高了P25的光催化活性；由于NiO的导带位置与P25不匹配而使P25的光催化效率降低；在共负载的P25体系中，CuO和NiO之间的相互作用可能产生了活性更高的Cu、Ni混合氧化物助催化剂，进而提高了P25的光催化能力。 |
| 关键词: CuO NiO TiO2(P25) 共负载 光催化 |
| 基金项目: |
| Abstract: The photocatalysts, CuO loaded TiO2(Degussa, P25)(CuO/P25), NiO loaded P25 (NiO/P25) and CuO-NiO co-loaded P25(CuO-NiO/P25), were synthesized by impregnation and pyrolysis processes. The photocatalytic activities of the catalysts in the photodegradation of methyl orange under UV light were investigated. The results show that the photocatalytic activity of CuO/P25 is higher than that of commercial P25 and CuO can transfer and accumulate the photogenerated electrons to enhance the photocatalytic activity of P25. However, the photocatalytic activity of NiO/P25 is lower than that of P25, probably due to its more negative conduction band position. The highly active mixtures of Cu and Ni oxides could be produced by the interaction between CuO and NiO so that the photodegradation efficiency of 0.5%CuO-0.1%NiO/P25 displays approximately 8%, 17% and 15% higher than that of 0.5%CuO/P25, 0.1%NiO/P25 and pure P25, respectively. |
| Keywords: CuO NiO TiO2(P25) co-loading photocatalysis |
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| 摘要点击次数: 1960 |
| 全文下载次数: 3142 |
| 路彦景,李向清,穆 劲.CuO-NiO助催化剂对TiO2(P25)光催化活性的影响[J].无机化学学报,2009,25(7):1149-1152. |
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