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Preparation method of vertically-grown rhenium disulfide nanosheet

A rhenium disulfide, vertical growth technology, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry, etc., can solve the problem of low deposition rate, and achieve the effect of simple preparation process, large quantity, and good electrocatalytic activity

Active Publication Date: 2019-08-20
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still defects in the synthesis of large-area three-dimensional rhenium disulfide nanosheets by vapor deposition, such as the obtained three-dimensional rhenium disulfide nanosheets will be mixed with a certain amount of two-dimensional rhenium disulfide nanosheets and the deposition rate is relatively slow. inferior

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  • Preparation method of vertically-grown rhenium disulfide nanosheet
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  • Preparation method of vertically-grown rhenium disulfide nanosheet

Examples

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Effect test

Embodiment 1

[0028] A preparation method for vertically grown rhenium disulfide nanosheets, comprising the following steps:

[0029] Step 1, pretreatment of silicon wafer A: ultrasonically clean silicon wafer A with a size of 1 cm×1.8 cm in absolute ethanol, isopropanol and acetone for 10 minutes, and dry it to obtain a pretreated silicon wafer;

[0030] Pretreatment of the carbon cloth substrate: the carbon cloth substrate with a size of 1.8cm×4.5cm was ultrasonically cleaned in absolute ethanol and deionized water for 10min and 5min respectively, and then dried in an oven at 60°C to obtain a pretreated carbon cloth substrate;

[0031] Step 2, weigh 2 mg of rhenium trioxide, spread it on the pretreated silicon wafer and then place it in the corundum boat, then spread the pretreated carbon cloth base on the corundum boat, and then cover the silicon wafer B on the pretreated On the carbon cloth base, vent holes are left at both ends of the reaction boat;

[0032] Weigh 500mg of sulfur powd...

Embodiment 2

[0034] A preparation method of rhenium disulfide nanosheets grown vertically, the preparation method is the same as in Example 1, the difference is that in Example 2, the tubular furnace is heated to 700 °C at a heating rate of 30 °C / min, and vertical growth is obtained after 20 min. Grown rhenium disulfide nanosheets, the average size of the rhenium disulfide nanosheets is 20nm.

Embodiment 3

[0036] A preparation method of rhenium disulfide nanosheets grown vertically, the preparation method is the same as in Example 1, the difference is that in Example 3, the vacuum in the tube furnace is 1Pa, the argon flow rate is 80 sccm, and the tube furnace operates at 30°C The temperature was raised to 700° C. at a heating rate of / min, and vertically grown rhenium disulfide nanosheets were obtained after growing for 30 minutes. The average size of the rhenium disulfide nanosheets was 5 nm.

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Abstract

The invention discloses a preparation method of a vertically-grown rhenium disulfide nanosheet. The preparation method comprises the following steps: placing rhenium trioxide on a silicon wafer A, then putting the silicon wafer A in a reaction boat, horizontally laying a carbon cloth substrate on the reaction boat, then covering the carbon cloth substrate by a silicon wafer B, and reserving vent holes at two ends of the reaction boat; placing sulfur powder in a reaction container, placing the reaction boat and the reaction container in a quartz glass tube, placing the quartz glass tube in a vacuum tube furnace, then raising the temperature in the vacuum tube furnace to 650-850 DEG C at an inert gas atmosphere, and keeping the temperature for 20-40 minutes to obtain the vertically-grown rhenium disulfide nanosheet. The preparation method provided by the invention is simple in process, and the prepared three-dimensional rhenium disulfide nanosheet has relatively good electrocatalytic activity as a catalyst for electrochemical hydrogen production, and is good in stability. Meanwhile, due to the fact that the growth substrate is cheap and controllability of experiment conditions is good, the method can be easily introduced into practical industrial production, and therefore, the method has a wide application prospect in the green chemistry industry.

Description

technical field [0001] The invention relates to the technical field of preparation of electrochemical catalytic hydrogen production catalysts, in particular to a preparation method of vertically grown rhenium disulfide nanosheets. Background technique [0002] In recent years, emerging 2D nanomaterials have demonstrated great potential to be important electrochemical catalysts. The properties of this kind of ultrathin nanomaterials are very different from their bulk, and the diffusion path of ultrathin nanosheets is short, which can effectively promote charge transfer. Two-dimensional materials can be easily prepared by various strategies and their microstructure can be adjusted, making them ideal objects for exploring catalytic activity and electron transfer. Among them, rhenium disulfide is different from other transition metal dichalcogenides due to its low structural symmetry. For rhenium disulfide nanosheets with three-dimensional structure, the active sites can be ex...

Claims

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Application Information

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IPC IPC(8): C01G47/00B01J27/04
CPCC01G47/00B01J27/04C01P2002/72C01P2004/03C01P2006/40B01J35/39
Inventor 赵亚娟李建国黄剑锋曹丽云冯亮亮冯永强
Owner SHAANXI UNIV OF SCI & TECH
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