Constructing SrTiO3-TiO2 Heterogeneous Hollow Multi-shelled Structures for Enhanced Solar Water Splitting
Constructing SrTiO3-TiO2 Heterogeneous Hollow Multi-shelled Structures for Enhanced Solar Water Splitting
复制标题
构建 SrTiO·-TiO·异质空心多壳结构以增强太阳能水分解。
DOI：
10.1002/anie.201812364
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发表时间：
2019-01-28
影响因子：
16.6
通讯作者：
Wang, Dan
中科院分区：
文献类型：
--
作者：
Wei, Yanze;Wang, Jiangyan;Wang, Dan
构建中空多壳结构（HoMS）对提高催化剂的光吸收性能和提高其在太阳能转化应用中的性能具有重要作用。采用水热法将SrTiO 3晶化在TiO 2 HoMS表面，实现SrTiO 3在TiO 2表面的完全覆盖，构建SrTiO 3/TiO 2异质HoMS。与SrTiO 3纳米颗粒相比，花椰菜样SrTiO 3-TiO 2非均相HoMS表现出四倍高的总水分解性能，即10.6 μ mol h（-1）产生H-2和5.1 μ mol h（-1）释放O-2，并且在365 nm处的表观量子效率（AQE）为8.6%，这主要归因于：1）HoMS提高了光催化剂的光吸收能力; 2）SrTiO 3-TiO 2结提高了光生载流子的分离效率。
Constructing hollow multi-shelled structures (HoMSs) has a significant effect on promoting light absorption property of catalysts and enhancing their performance in solar energy conversion applications. A facile hydrothermal method is used to design the SrTiO3-TiO2 heterogeneous HoMSs by hydrothermal crystallization of SrTiO3 on the surface of the TiO2 HoMSs, which will realize a full coverage of SrTiO3 on the TiO2 surface and construct the SrTiO3/TiO2 junctions. The broccoli-like SrTiO3-TiO2 heterogeneous HoMSs exhibited a fourfold higher overall water splitting performance of 10.6 mu mol h(-1) for H-2 production and 5.1 mu mol h(-1) for O-2 evolution than that of SrTiO3 nanoparticles and the apparent quantum efficiency (AQE) of 8.6% at 365 nm, which can be mainly attributed to 1) HoMS increased the light absorption ability of the constructed photocatalysts and 2) the SrTiO3-TiO2 junctions boosted the separation efficiency of the photo-generated charge carriers.