Method for preparing vertical transition metal sulfide nanosheet array and electro-catalysis hydration separation catalyst

Abstract

The invention discloses a method for preparing a vertical transition metal sulfide nanosheet array through chemical vapor deposition. The method comprises the following steps: 1) adopting porous goldas a growth substrate; 2) placing single sulfur and a chloride of a transition metal as precursors at the upstream of an air flow; and 3) introducing a carrier gas to remove residual air, after the air flow is stabilized, respectively heating the single sulfur, the chloride of the transition metal and the porous gold to different temperatures, keeping the temperatures for a certain time, and growing on the substrate, thereby obtaining the vertical transition metal sulfide nanosheet array. By adopting the method, preparation of large-scale metallic transition metal sulfide nanosheets can be achieved, and moreover the vertical metallic transition metal sulfide nanosheet array prepared by using the synthesis method has excellent electro-catalysis hydration separation properties.

Description

technical field [0001] The invention belongs to the field of materials, specifically, the present invention relates to a controllable preparation of a vertical transition metal sulfide nanosheet array on a porous gold substrate by using a chemical vapor deposition method, provides a vertical transition metal sulfide nanosheet, and applies it for electrocatalytic hydrogen evolution. Background technique [0002] Transition metal chalcogenides (MX2, M = transition metal; X = S, Se, Te) are important components in two-dimensional layered materials, and the reported MX2 materials are mainly concentrated on the sixth subgroup metals (Mo and W ) on chalcogenides, which is mainly due to the suitable band gap of this kind of two-dimensional semiconductors and can be applied to electronic and optoelectronic devices. Looking at the MX2 material family, there are still many members that have not attracted people's attention. Among them, metallic transition metal chalcogenides (such a...

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Problems solved by technology

[0006] However, both methods have their own disadvantages

The former uses lithium-ion intercalation to obtain tantalum disulfide nanosheets, whose lateral size is often at the nanometer level, and the thickness is random, and there are problems such as surface adsorption pollution, which is not conducive to subsequent processing and application.

The latter has high energy consumption and low efficiency during the long-term high-temperature reaction process. The thickness and size of the tantalum disulfide nanosheets obtained by mechanical exfoliation cannot be controlled, and there are problems such as low preparation efficiency and residual polymer pollution.

The shortcomings of these two preparation methods limit the research and application development of tantalum disulfide nanosheets, so it is necessary to invent a new method of high efficiency, energy saving and controllable preparation of uniform thickness and large size tantalum disulfide nanosheets

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