Integrating metallic nanoparticles of Au and Pt with MoS2-CdS hybrids for high-efficient photocatalytic hydrogen generation via plasmon-induced electron and energy transfer
Integrating metallic nanoparticles of Au and Pt with MoS2-CdS hybrids for high-efficient photocatalytic hydrogen generation via plasmon-induced electron and energy transfer
复制标题
将 Au 和 Pt 金属纳米粒子与 MoS2-CdS 杂化物集成，通过等离子体诱导电子和能量转移实现高效光催化制氢
DOI：
10.1039/c7ra03912c
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Wang Qu-Quan
中科院分区：
文献类型：
--
作者：
Chen Kai;Ma Liang;Wang Jia-Hong;Cheng Zi-Qiang;Yang Da-Jie;Li Ying-Ying;Ding Si-Jing;Zhou Li;Wang Qu-Quan
基于半导体的光催化制氢是一种很有前景的太阳能转换方法，但单组分光催化剂仍然受到快速电荷复合的限制，效率较低。在这里，我们研究了 (MoS2–CdS)/Au 和 (MoS2–CdS)/Pt 杂化物的高效光催化制氢，并证明了等离激元诱导的电子和能量转移以及金属纳米颗粒 (NP) 的共催化作用。在这些混合物中，可见光收集器 CdS NP 以及等离子体 Au NP 或助催化剂 Pt NP 生长在单层 MoS2 纳米片上。 (MoS2–CdS)/Au和(MoS2–CdS)/Pt在可见光照射下光催化产氢量分别是MoS2–CdS的3.2倍和2.4倍。有趣的是，Au NPs 和 Pt NPs 的共同作用导致了 17 倍的增强。杂化物中的等离激元Au NPs在提高氢气生成效率方面发挥着多重重要作用：（1）增强MoS2-CdS亚基中的光捕获和电荷分离； (2)提供多重等离子体介导的热电子注入通道； (3)放大Pt的助催化剂作用。目前的工作为合理整合多组分光催化剂以提高光催化性能提供了一种有前途的方法。
Semiconductor-based photocatalytic H2 generation is a promising approach to convert solar energy, but single-component photocatalysts still suffer from low efficiency limited by the fast charge recombination. Here, we investigate the high-efficient photocatalytic hydrogen generation of (MoS2–CdS)/Au and (MoS2–CdS)/Pt hybrids, and demonstrate the plasmon-induced electron and energy transfer as well as the co-catalytic effect of metallic nanoparticles (NPs). In these hybrids, visible-light-harvester CdS NPs as well as plasmonic Au NPs or co-catalyst Pt NPs were grown on the monolayer MoS2 nanosheets. The photocatalytic H2 generation under visible light irradiation of (MoS2–CdS)/Au and (MoS2–CdS)/Pt is respectively 3.2 times and 2.4 times that of MoS2–CdS. Intriguingly, the co-effect of Au NPs and Pt NPs leads to the 17 times enhancement. The plasmonic Au NPs in the hybrids play multiply significant roles to increase efficiency of H2 generation: (1) enhance light-harvesting and charge separation in the MoS2–CdS subunit; (2) provide multiply plasmon-mediated hot electron injection channels; (3) amplify the co-catalyst effect of Pt. The present work offers a promising approach for the rational integration of multi-component photocatalyst to improve photocatalytic performance.