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MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-09-28 00:00:00 , DOI: 10.1039/c7ee02464a
L. Guo 1, 2, 3, 4 , Z. Yang 4, 5, 6, 7 , K. Marcus 2, 3, 4, 8 , Z. Li 2, 3, 4, 8 , B. Luo 8, 9, 10, 11, 12 , L. Zhou 2, 3, 4, 8 , X. Wang 8, 9, 10, 11, 12 , Y. Du 4, 5, 6, 7 , Y. Yang 1, 2, 3, 4, 8
Affiliation  

In this study, we report nonmetal plasmonic MoS2@TiO2 heterostructures for highly efficient photocatalytic H2 generation. Large area laminated MoS2 in conjunction with TiO2 nanocavity arrays is achieved via carefully controlled anodization, physical vapor deposition, and chemical vapor deposition processes. The broad spectral response ranging from ultraviolet-visible (UV-vis) to near-infrared (NIR) wavelengths and finite element frequency-domain simulations suggest that this MoS2@TiO2 heterostructure enhances photocatalytic activity for H+ reduction. A high H2 yield rate of 181 μmol h−1 cm−2 (equal to 580 mmol h−1 g−1 based on the loading mass of MoS2) is achieved using a low catalyst loading mass. The spatially uniform heterostructure, correlated with plasmon-resonance through the conformal MoS2 coating that effectively regulates charge transfer pathways, is proven to be vitally important for the unique solar energy harvesting and photocatalytic H2 production. As an innovative exploration, our study demonstrates that the photocatalytic activities of nonmetal, earth-abundant materials can be enhanced with plasmonic effects, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuels.

中文翻译:

MoS 2 / TiO 2异质结构作为非金属等离子体光催化剂,可高效放氢

在这项研究中,我们报告了非金属等离子体MoS 2 @TiO 2异质结构,用于高效的光催化H 2生成。通过仔细控制的阳极氧化,物理气相沉积和化学气相沉积工艺,可以实现与TiO 2纳米腔阵列相结合的大面积层压MoS 2。从紫外可见光(UV-vis)到近红外(NIR)波长的宽光谱响应以及有限元频域模拟表明,这种MoS 2 @TiO 2异质结构增强了H +还原的光催化活性。高H 2使用低催化剂负载量,可以实现181μmolh -1 cm -2的产率(基于MoS 2的负载量等于580 mmol h -1 g -1)。事实证明,空间均匀的异质结构通过有效调节电荷转移途径的共形MoS 2涂层与等离子体共振相关,对于独特的太阳能收集和光催化H 2至关重要。生产。作为一项创新的探索,我们的研究表明,等离子体效应可以增强地球上非金属的非金属材料的光催化活性,该等离子体活性可以用作将太阳能转化为化学燃料的出色催化剂。
更新日期:2017-09-28
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