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首页> 外文期刊>Journal of Materials Research >Metal ion and N co-doped TiO_2 as a visible-light photocatalyst
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Metal ion and N co-doped TiO_2 as a visible-light photocatalyst

机译：金属离子和N共掺杂TiO_2作为可见光光催化剂

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摘要

Powders of TiO_2 doped with a metal ion and N species were prepared by a polymerized complex method and the visible-light photocatalytic activities of the products are investigated. Of the metal ions studied (K~+, Ca~(2+), Sr~(2+), Ba~(2+), Nb~(5+), Fe~(3+), Zn~(2+), and Al~(3+)), the photocatalyst prepared with Sr~(2+) exhibits the highest activity for acetaldehyde decomposition under visible-light irradiation. Results obtained from x-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) analyses suggest that the doped N species reside at interstitial lattice positions in the catalyst. It was also found by XPS and ESR measurements that the doped N species combine with lattice oxygen to give rise to a paramagnetic property. The visible-light response of the catalyst is driven by the formation of paramagnetic N species at interstitial positions in the TiO_2, lattice.
机译：采用聚合络合法制备了掺杂有金属离子和N的TiO_2粉末，研究了产物的可见光催化活性。在研究的金属离子中（K〜+，Ca〜（2 +），Sr〜（2 +），Ba〜（2 +），Nb〜（5 +），Fe〜（3 +），Zn〜（2+ ）和Al〜（3+）），用Sr〜（2+）制备的光催化剂在可见光照射下表现出最高的乙醛分解活性。从X射线光电子能谱（XPS）和电子自旋共振（ESR）分析获得的结果表明，掺杂的N物种驻留在催化剂的间隙晶格位置。通过XPS和ESR测量还发现，掺杂的N物质与晶格氧结合会产生顺磁性。催化剂的可见光响应是由在TiO_2晶格的间隙位置形成顺磁性N物种驱动的。

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