Sensitization of NaMO3 (M: Nb and Ta) Photocatalysts with Wide Band Gaps to Visible Light by Ir Doping
Sensitization of NaMO3 (M: Nb and Ta) Photocatalysts with Wide Band Gaps to Visible Light by Ir Doping
复制标题
DOI：
10.1246/bcsj.82.514
复制
发表时间：
2009-04-15
影响因子：
4
通讯作者：
Kudo, Akihiko
中科院分区：
文献类型：
--
作者：
Iwase, Akihide;Saito, Kenji;Kudo, Akihiko
NiO/NaNbO_3(BG：3.5 eV)在紫外光照射下表现出光催化分解水生成H-2和O-2的活性。当NaMo3(M：Nb，Ta)与Ir离子、碱土金属离子或La离子共掺杂时，除了基质材料的带隙吸收带外，还观察到了一个新的可见光吸收带。碱土金属和镧离子的共掺杂有助于维持NaMO3粉末的电荷平衡和形成细小的晶体。这些NaNbO_3和NaTaO_3与Ir离子和碱土金属离子或La离子共掺杂，在可见光照射下表现出从含有牺牲剂的水溶液中析出H-2或O-2的光催化活性。
NiO/NaNbO3 (BG: 3.5 eV) showed photocatalytic activity for water splitting into H-2 and O-2 under UV irradiation. When NaMO3 (M: Nb and Ta) was codoped with iridium ions and alkaline earth metal ions or lanthanum ions, a new visible-light absorption band was observed in addition to the band gap absorption band of the host material. The codopants of alkaline earth metal and lanthanum ions contributed to maintaining the charge balance and forming of fine crystals of the NaMO3 powder. These NaNbO3 and NaTaO3 codoped with iridium ions and alkaline earth metal ions or lanthanum ions showed photocatalytic activities for H-2 or O-2 evolution from an aqueous solution containing a sacrificial reagent under visible light irradiation.