Au/Pt co-loaded ultrathin TiO2 nanosheets for photocatalyzed H2 evolution by the synergistic effect of plasmonic enhancement and co-catalysis
Au/Pt co-loaded ultrathin TiO2 nanosheets for photocatalyzed H2 evolution by the synergistic effect of plasmonic enhancement and co-catalysis
复制标题
Au/Pt共负载超薄TiO2纳米片通过等离子体增强和共催化的协同效应光催化析出H-2
DOI：
10.1039/c5ra17732d
复制
发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Geng, Baoyou
中科院分区：
文献类型：
--
作者：
Chen, Changyu;Kuai, Long;Geng, Baoyou
共催化和等离子体增强是提高半导体光催化性能的两种有效方法。在这项工作中，我们通过在超薄 TiO2 纳米片表面光沉积 Au 和 Pt 纳米颗粒来系统地研究它们的协同功能，其中 Au 刺激等离子体效应，Pt 充当助催化剂。研究发现Au和Pt沉积都可以提高H-2的产率。更重要的是，通过同时负载Au和Pt可以获得更快的H-2生产。此外，合适的金负载量对于光催化性能也很重要。结果，通过在TiO2上沉积0.75% Pt和0.5% Au，实现了7.19 mmol g(-1) h(-1)的最高H-2速率。因此，本工作提出了Au的等离子体增强和Pt的共催化光催化H-2生产之间的协同效应，这对催化剂的设计和制备有一定的指导作用。
Co-catalysis and plasmonic enhancement are two efficient ways to improve the photocatalytic performance of semiconductors. In this work, we systematically investigate their synergistic functions by photo-depositing Au and Pt nanoparticles on the surface of ultrathin TiO2 nanosheets, where Au stimulates the plasmonic effect and Pt acts as the co-catalyst. It was found that both Au and Pt deposition can increase the H-2 production rate. More importantly, faster H-2 production can be obtained with the co-loading of Au and Pt. Furthermore, a suitable Au loading was important for the photocatalytic performance. As a consequence, the highest H-2 rate of 7.19 mmol g(-1) h(-1) was achieved by depositing 0.75% Pt and 0.5% Au on TiO2. Therefore, this work presents the synergistic effect between the plasmonic enhancement of Au and the co-catalysis of Pt for photocatalytic H-2 production, which contributes some guidance to catalyst design and preparation.