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Embedded photoelectrode based on low-temperature liquid metal integration and large-scale preparation method

A low-temperature liquid and liquid metal technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of large limitations of integration methods, complex processes, high costs, etc., and achieve strong resistance to external forces, simple process, and low cost. Effect

Pending Publication Date: 2022-04-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a high-performance, stable semiconductor photocatalyst particle-embedded photoelectrode, and the method is simple and easy to scale, and can solve the problems of existing integration methods such as large limitations, complex processes, high costs, and long processes.

Method used

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  • Embedded photoelectrode based on low-temperature liquid metal integration and large-scale preparation method
  • Embedded photoelectrode based on low-temperature liquid metal integration and large-scale preparation method
  • Embedded photoelectrode based on low-temperature liquid metal integration and large-scale preparation method

Examples

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preparation example Construction

[0045] In the specific implementation process, the present invention provides an embedded photoelectrode based on low-temperature liquid metal integration and a large-scale preparation method. Taking advantage of the low melting point, easy processing and high electrical conductivity of low-temperature liquid metals, the low-temperature Field metal is first heated above the melting point and transformed into a liquid state. In the molten state of the Field metal, it is scraped on the substrate to form a film, and then the semiconductor photoelectric Catalyst particles are ultrasonically dispersed in isopropanol solution, and uniformly drop-coated on the surface of the Field metal film to form a film, and then pressure is applied by means of rolling to embed the semiconductor photocatalyst particles in the liquid Field metal film. After cooling and solidifying, use an air gun to blow Scanning (or ultrasound) removes the semiconductor photocatalyst particles that are not embedded...

Embodiment 1

[0057] In this embodiment, liquid metal and BiVO are used on the quartz substrate 4 Powder preparation of BiVO 4 Photoelectrode, comprising the steps of:

[0058] Take 30mg of BiVO 4 The powder was added to 30ml of isopropanol solution, and ultrasonically dispersed for 30min to obtain a suspension. The suspension was filtered and dried for later use. Quartz slices with a surface size of 1cm×3cm were ultrasonically cleaned with ethanol, acetone, and isopropanol for 15 minutes, then blown dry with a nitrogen gun, heated the above-mentioned quartz slices to 108°C on a heating table, and then scraped a uniform layer on the quartz slices with a scraper. Field metal film. Cover the powder film obtained by the above-mentioned suction filtration on the metal film, and use a silica gel roller to roll it horizontally and vertically for 3 to 5 times respectively. After the metal is cooled, use a nitrogen gun to remove excess powder particles on the surface, and place it on a heating...

Embodiment 2

[0061] In this example, liquid metal and commercial ZnO powder are used to prepare corresponding photoelectrodes on a quartz substrate, and the universality of the present invention for different photocatalyst particles is verified:

[0062] 30 mg of commercial ZnO powder was added to 30 ml of isopropanol solution, and ultrasonically dispersed for 30 min to obtain a suspension. The suspension was filtered by suction and dried for later use. Quartz slices with a surface size of 1cm×3cm were ultrasonically cleaned by ethanol, acetone, and isopropanol for 15 minutes, then blown dry with a nitrogen gun, heated the quartz slices to 108°C on a heating platform, and then scraped a uniform layer on the quartz slices with a scraper. Field metal film. Cover the ZnO powder thin film obtained by the suction filtration above on the metal film, and use a silica gel roller to roll it horizontally and vertically for 3 to 5 times respectively. After the metal is cooled, use a nitrogen gun to...

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Abstract

The invention relates to the field of photoelectrochemical catalytic conversion and storage, in particular to an embedded photoelectrode based on low-temperature liquid metal integration and a large-scale preparation method. The preparation method comprises the following steps: firstly, heating low-temperature liquid metal above a melting point to be converted into a liquid state, coating the liquid metal on a substrate to form a film in a metal molten state, then ultrasonically dispersing semiconductor photocatalyst particles in a solvent, uniformly depositing the semiconductor photocatalyst particles on the surface of the liquid metal to form a film, and embedding the semiconductor photocatalyst particles into a liquid metal film to form the film. After cooling and solidification, semiconductor photocatalyst particles which are not embedded into the solidified metal film are removed through air gun blowing (or ultrasonic), and the embedded photoelectrode which is high in film forming quality and excellent in photoelectrochemical water decomposition performance is obtained. According to the invention, various photocatalyst particles can be integrated on substrates with different attributes by effectively utilizing the rheological easy-to-process characteristic and the room-temperature curing attribute of the low-temperature liquid metal in a molten state, so that the photoelectrode with excellent photoelectrochemical water decomposition performance is obtained.

Description

technical field [0001] The invention relates to the field of photoelectrochemical catalytic conversion and storage, in particular to an embedded photoelectrode based on low-temperature liquid metal integration and a large-scale preparation method. Background technique [0002] Photoelectrochemical water splitting to produce hydrogen can directly convert and store abundant solar energy in the chemical bonds of hydrogen, and hydrogen is easy to store and transport, which can effectively solve the problems of uneven distribution and immediacy of solar energy, and is one of the effective ways to convert and utilize solar energy First, it is also one of the important ways to help achieve "carbon neutrality". Although various high-efficiency photocatalytic water splitting photoelectrode materials for hydrogen production have been developed and studied one after another, and the relevant principles have also made great progress, it is still difficult to meet the stringent requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/052C25B1/04C25B1/55C25B11/077C25B11/075
CPCC25B11/052C25B1/04C25B1/55C25B11/077C25B11/075
Inventor 刘岗甄超成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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