Abstract

MoS₂ nanofilms were created by thermochemical processing (sulfurization) of thin-film Мо and МоО_у precursors in S vapor. The precursor films were created by pulsed laser deposition. The obtained molybdenum disulfide films consisted of 2H-MoS₂ nanocrystals with laminar packing of basal planes oriented perpendicular to the film surface. The increase in the sulfurization temperature from 500°C to 800°C provided better quality of local packing and, as a consequence, reduction of electric resistance, higher concentration of carriers (electrons) and their mobility. The application of metal oxide precursor МоО_у resulted in higher efficiency of synthesis of high quality MoS₂ nanofilms. The efficiency of activation of the electrochemical processes of hydrogen production in an acidic solution was lower with crystalline MoS₂ nanofilms than with amorphous MoS_x films. Nanocrystalline MoS₂ films, however, manifested improved photo- and electrocatalytic characteristics in activation of reactions of hydrogen and oxygen evolution in an alkaline solution.

中文翻译：

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MoS 2纳米膜的电物理和光电催化特性

摘要

的MoS ₂纳米薄膜通过薄膜Мо和МоО的热化学处理（硫化）创建_у S中蒸气前体。通过脉冲激光沉积产生前体膜。所获得的二硫化钼膜由2H-MoS ₂纳米晶体组成，基膜的层状堆积垂直于膜表面。硫化温度从500°C升高到800°C，可以提供更好的局部填充质量，因此，可以降低电阻，提高载流子（电子）的浓度及其迁移率。金属的应用氧化物前体МоО _у导致了高品质的MoS合成的更高的效率₂纳米膜。结晶的MoS ₂纳米膜比酸性的MoS _x膜在酸性溶液中激活制氢的电化学过程的效率低。然而，纳米晶态的MoS ₂薄膜在碱性溶液中激活了氢气和氧气逸出的反应，从而表现出改善的光催化和电催化特性。