Photocatalytic Water Splitting with the Cr‐Doped Ba2In2O5/In2O3 Composite Oxide Semiconductors.
Photocatalytic Water Splitting with the Cr‐Doped Ba2In2O5/In2O3 Composite Oxide Semiconductors.
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DOI：
10.1002/chin.200538027
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
Defa Wang;Zhigang Zou;Jinhua Ye
中科院分区：
文献类型：
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作者：
Defa Wang;Zhigang Zou;Jinhua Ye
通过固相反应法合成的Cr掺杂的Ba 2 In 2 O 5/In 2 O3（C-BIO）氧化物半导体被发现是一种新型的复合光催化剂体系，具有增强的水分解活性。C-BIO粉末样品用X射线衍射（XRD）、紫外维斯漫反射光谱、能量色散光谱（EDS）和高分辨率透射电子显微镜（HRTEM）进行了表征。Pt或NiO负载的C−BIO和单个前体材料的光催化活性分别通过在可见光下从CH 3OH水溶液中放出H2和在UV光照射下分解纯水来评价。结果发现，与单独的材料相比，复合C-BIO显示出更高的H2释放速率。讨论了C-BIO体系的能带结构、电荷载流子的激发、分离和输运以及H2和O2释放的氧化还原反应与光催化和物理性质的关系，并给出了一些指导性的结论。
The Cr-doped Ba2In2O5/In2O3 (C−BIO) oxide semiconductors synthesized by a solid-state reaction method were found to be a novel composite photocatalyst system with enhanced activity for water splitting. The C−BIO powder samples were characterized with X-ray diffraction (XRD), UV−vis diffuse reflectance spectrometry, energy dispersive spectrometry (EDS), and high-resolution transmission electron microscopy (HRTEM). The photocatalytic activities of Pt- or NiO-loaded C−BIO and individual precursor materials were evaluated by H2 evolution from aqueous CH3OH solution under visible light and by pure water splitting under UV light irradiation, respectively. It was found that the composite C−BIO showed a higher H2 evolution rate in comparison with individual materials. The overall band structure, charge carrier excitation, separation, and transportation and the redox reactions for H2 and O2 evolution in the C−BIO system are discussed in relation to the photophysical and photocatalytic properties, and some guidelin...