Method for preparing high density porous two-dimensional molybdenum disulfide nanosheet

Abstract

The invention relates to the technical field of nanomaterial preparation and particularly relates to a method for preparing a high density porous two-dimensional molybdenum disulfide nanosheet. The method comprises preparing an ordered aluminum nanometer hole AAO array template, directly forming a single layer of MoS2 nanosheets on a SiO2 / Si base through a CVD method, transferring the ordered aluminum nanometer hole AAO array template to the single layer of MoS2 nanosheets to obtain a MoS2 nanosheet sample, transferring the MoS2 nanosheet sample into an ion etching chamber, carrying out etching, bombarding the MoS2 nanosheet sample, and removing the template of the MoS2 nanosheet sample to obtain the high density porous two-dimensional molybdenum disulfide nanosheets. The method can introduce a boundary-like structure to the base surface of the two-dimensional MoS2 to increase the number of active sites, can directly form a single layer of MoS2 on the SiO2 / Si base, prevents MoS2 transferring and prevents a MoS2 loss during the transferring.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing high-density porous two-dimensional molybdenum disulfide nanosheets. Background technique [0002] Energy and the environment are topics that are closely related to us, and the contradiction between the two seems sharp and irreconcilable at present, but there is a magical balance between them-clean energy. Among them, the high-efficiency electrolysis of water for hydrogen production is recognized as the "leader" in the method of obtaining clean energy (hydrogen energy). However, the development of suitable catalysts to accelerate the process of electrolysis of water for hydrogen production to achieve commercial-scale production of hydrogen energy has always been a challenge for scientists. Headache problem. At present, materials with good catalytic performance (noble metals such as Pt and Pb) are very expensive. Therefore, various catalyst...

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Problems solved by technology

[0003] Two-dimensional MoS 2 Generally, there are two phases: semiconductor phase (2H phase) and metal phase (1T phase). Studies have shown that 2H-MoS 2 The catalytic activity of MoS comes from the unsaturated bonding atoms at the boundary, while the in-plane atoms do not have catalytic activity, which makes the proportion of atoms that can contribute to the catalytic activity very low, which seriously restricts the MoS 2 Catalytic hydrogen evolution ability

[0004] However, the preparation of SV-MoS 2 The nanosheet process requires the MoS 2 The transfer of nanosheets to other substrates is relatively complicated, and the transferred MoS 2 The adhesion between the nanosheet and the substrate is not strong, and it is easy to fall off

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