Hierarchical Heterostructure of ZnO@TiO(2) Hollow Spheres for Highly Efficient Photocatalytic Hydrogen Evolution.
Hierarchical Heterostructure of ZnO@TiO(2) Hollow Spheres for Highly Efficient Photocatalytic Hydrogen Evolution.
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ZnO@TiO2空心球的多级异质结构用于高效光催化析氢
DOI：
10.1186/s11671-017-2304-5
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发表时间：
2017-09-13
影响因子：
--
通讯作者：
Dai P
中科院分区：
文献类型：
--
作者：
Li Y;Wang L;Liang J;Gao F;Yin K;Dai P
分级纳米结构的合理设计和制备是增强光催化析氢反应的关键。本文采用简单的水热法制备了完整的中空ZnO@TiO2异质结。这种独特的分层异质结构不仅引起了多次反射，增强了光吸收，而且由于ZnO-TiO 2界面上产生的电势差，提高了光生载流子的寿命和转移。结果表明，与ZnO和TiO2相比，ZnO@TiO2复合光催化剂在模拟太阳光下具有较高的产氢率，最高可达0.152 mmol h-1g-1.此外，ZnO@TiO2复合光催化剂在连续30 h的光稳定性测试中也具有较高的重复性。这种低成本、无毒、易得的ZnO@TiO2催化剂有望在光催化H2方面展现出良好的应用前景，以满足未来燃料的需求。
The rational design and preparation of hierarchical nanoarchitectures are critical for enhanced photocatalytic hydrogen evolution reaction (HER). Herein, well-integrated hollow ZnO@TiO2heterojunctions were obtained by a simple hydrothermal method. This unique hierarchical heterostructure not only caused multiple reflections which enhances the light absorption but also improved the lifetime and transfer of photogenerated charge carriers due to the potential difference generated on the ZnO-TiO2interface. As a result, compared to bare ZnO and TiO2, the ZnO@TiO2composite photocatalyst exhibited higher hydrogen production rated up to 0.152 mmol h-1g-1under simulated solar light. In addition, highly repeated photostability was also observed on the ZnO@TiO2composite photocatalyst even after a continuous test for 30 h. It is expected that this low-cost, nontoxic, and readily available ZnO@TiO2catalyst could exhibit promising potential in photocatalytic H2to meet the future fuel needs.
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