MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution†,Energy & Environmental Science

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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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