Atomic Layer Deposition of MoSe2 Nanosheets on TiO2 Nanotube Arrays for Photocatalytic Dye Degradation and Electrocatalytic Hydrogen Evolution,ACS Applied Nano Materials

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Atomic Layer Deposition of MoSe2 Nanosheets on TiO2 Nanotube Arrays for Photocatalytic Dye Degradation and Electrocatalytic Hydrogen Evolution
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-11-25 , DOI: 10.1021/acsanm.0c02553
Raul Zazpe _{1,

2} , Richard Krumpolec ₃ , Hanna Sopha _{1,

2} , Jhonatan Rodriguez-Pereira ₁ , Jaroslav Charvot ₄ , Luděk Hromádko _{1,

2} , Eva Kolíbalová ₂ , Jan Michalička ₂ , David Pavliňák ₃ , Martin Motola ₁ , Jan Přikryl ₁ , Miloš Krbal ₁ , Filip Bureš ₄ , Jan M. Macak _{1,

2}

Affiliation

Herein, a hierarchical MoSe₂/1D TiO₂ nanotube layer structure was successfully fabricated in a simple and fast fashion and its photocatalytic and electrocatalytic properties were assessed. The novelty of this work lies in the utilization of the atomic layer deposition (ALD) technique to deposit MoSe₂ nanosheets on 1D TiO₂ nanotube layers. The photoelectrochemical and photo- and electrocatalytic properties were explored and optimized as a function of MoSe₂ ALD cycles. ALD allowed precise control on MoSe₂ nanosheet size, and in turn, on the surface structure, which is pivotal for efficient catalysts. The MoSe₂ nanosheets grew on both the inner and outer 1D TiO₂ nanotube surface mainly in a perpendicular orientation, maximizing the exposed active edges, an essential aspect to fully exploit the MoSe₂ photo- and electrochemical properties. Outstanding photo- and electrocatalytic activities were recorded in both organic dye pollutant degradation and hydrogen evolution reaction applications, respectively. The excellent photocatalytic and electrochemical activities stem from the synergy between tailored ALD loading of MoSe₂ nanosheets and the 1D TiO₂ nanotubular structure with a high surface/volume ratio, which provides fast electron transfer and easy access to the MoSe₂ active edges, boosting the catalytic activity.

中文翻译：

摩西的原子层沉积₂纳米片在TiO ₂纳米管阵列光催化降解染料和电析氢

在此，以简单，快速的方式成功地制备了分级的MoSe ₂ / 1D TiO ₂纳米管层结构，并评估了其光催化和电催化性能。这项工作的新颖性在于利用原子层沉积（ALD）技术在1D TiO ₂纳米管层上沉积MoSe ₂纳米片。根据MoSe ₂ ALD循环，探索并优化了光电化学，光催化和电催化性能。ALD可以精确控制MoSe ₂纳米片的尺寸，进而控制表面结构，这对于有效的催化剂至关重要。MoSe ₂纳米片主要在垂直方向上在内部和外部1D TiO ₂纳米管表面上生长，从而最大化了暴露的活性边缘，这是充分利用MoSe ₂光和电化学特性的重要方面。在有机染料污染物降解和氢气释放反应应用中分别记录了出色的光催化活性和电催化活性。MoSe ₂纳米片的定制ALD负载与具有高表面/体积比的1D TiO ₂纳米管结构之间的协同作用具有出色的光催化和电化学活性，可提供快速的电子转移并易于接近MoSe ₂活性边缘，从而增强了催化活性。

更新日期：2020-12-24

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