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Substrate for photoelectrochemical decomposition of water to produce hydrogen, and preparation method and application thereof

A photoelectrochemical, water-splitting technology, applied in the direction of electrolysis process, electrolysis components, electrodes, etc., can solve the problem of unsatisfactory performance of nanocrystal PEC

Active Publication Date: 2019-02-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is reported that the defect spinel structure b-In 2 S 3 is an n-type semiconductor with a bandgap of 2.0-2.3eV, it is a promising photoanode material, however pure In 2 S 3 The PEC performance of nanocrystals themselves is still far from satisfactory

Method used

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  • Substrate for photoelectrochemical decomposition of water to produce hydrogen, and preparation method and application thereof
  • Substrate for photoelectrochemical decomposition of water to produce hydrogen, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Clean the FTO glass substrate with deionized water and blow it dry with a nitrogen gun. Take the clean reaction kettle, put the clean FTO glass substrate with the front side (the side with FTO coating) facing down, lean against the container wall and stand in the reaction kettle ;

[0030] Dissolve 24mM indium trichloride tetrahydrate and 60mM thioacetamide in ethylene glycol to make a 40ml mixed solution, pour it into the reaction kettle, and react at 180°C for 2h to obtain In 2 S 3 The substrate of the nanosheet array, with a bright yellow surface.

[0031] Clean the substrate with deionized water, blow dry it with a nitrogen gun, and place the substrate face down again (with In 2 S 3 face) in a clean reaction kettle, so that the glass piece is completely submerged by the mixed solution.

[0032] Prepare 100ml of 1.6mM zinc sulfate aqueous solution, mix it with 2ml of ammonia water and put it into the reaction kettle, react at 90°C for 1h, take it out, clean it wi...

Embodiment 2

[0034] Clean the FTO glass substrate with deionized water and blow it dry with a nitrogen gun. Take the clean reaction kettle, put the clean FTO glass substrate with the front side (the side with FTO coating) facing down, lean against the container wall and stand in the reaction kettle .

[0035]Dissolve 24mM indium trichloride tetrahydrate and 63mM thioacetamide in ethylene glycol to make a 40ml mixed solution, pour it into a reaction kettle, and react at 200°C for 2h to prepare an array of In2S3 nanosheets attached to the surface base with a bright yellow surface.

[0036] Clean the substrate with deionized water and blow it dry with a nitrogen gun. Place the substrate face down again (the side with In2S3 attached) in a clean reaction kettle so that the glass piece is completely submerged in the mixed solution.

[0037] Prepare 100ml of 1.5mM zinc sulfate aqueous solution, mix it with 2ml of ammonia water and put it into the reaction kettle, react at 80°C for 2h, take it ou...

Embodiment 3

[0039] Clean the FTO glass substrate with deionized water and blow it dry with a nitrogen gun. Take the clean reaction kettle, put the clean FTO glass substrate with the front side (the side with FTO coating) facing down, lean against the container wall and stand in the reaction kettle .

[0040] Dissolve 24mM indium trichloride tetrahydrate and 65mM thioacetamide in ethylene glycol to make a 40ml mixed solution, pour it into the reaction kettle, and react at 180°C for 2 hours to obtain In 2 S 3 The substrate of the nanosheet array, with a bright yellow surface.

[0041] Clean the substrate with deionized water, blow dry it with a nitrogen gun, and place the substrate face down again (with In 2 S 3 face) in a clean reaction kettle, so that the glass piece is completely submerged by the mixed solution.

[0042] Prepare 100ml of 1.65mM zinc sulfate aqueous solution, mix it with 2ml of ammonia water, then introduce it into the reaction kettle, react at 100°C for 4h, take it o...

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Abstract

The invention relates to a substrate for photoelectrochemical decomposition of water to produce hydrogen, and a preparation method and application thereof. A traditional hydrothermal method is utilized for preparing an In2S3 ultra-thin nanosheet array with superior performance on the surface of FTO glass under the condition of new experimental parameters, and the prepared In2S3 ultra-thin nanosheet array is dense and uniform; and ZnO nanoparticles continue to grow on the prepared substrate for In2S3 photoelectrochemical water decomposition, a ZnO semiconductor and In2S3 build heterojunction, the particle size of the ZnO nanoparticles and the content of ZnO in In2S3 film are controlled by controlling the growth time of ZnO, and therefore, the photoelectric properties of In2S3 can be controlled and the photocurrent of the substrate for photolysis of water can be significantly improved. The preparation of the In2S3 nanosheet array is combined with the preparation of the ZnO nanoparticlesto form In2S3-ZnO heterojunction, and the photoelectric properties of In2S3 are improved due to the uniformity and large surface area of the ZnO nanoparticles. The photocurrent of a composite photoanode structure prepared according to the scheme is three times that of a pure In2S3 photoanode structure under exposure of simulated solar light of 500 W.

Description

technical field [0001] The invention belongs to the technical field of preparation of photohydrolysis materials, and relates to a method for preparing a substrate for photoelectrochemical water splitting to produce hydrogen and its products and applications, in particular to a zinc oxide nanoparticle-enhanced ultra-thin substrate for photoelectrochemical water splitting In 2 S 3 Preparation method of nanosheet substrate. Background technique [0002] As a clean, renewable, and environmentally friendly method for solar energy storage, photoelectrochemical (PEC) water splitting has proven to be one of the most efficient ways to produce hydrogen as a carbon-free fuel. Since the pioneering work of Fujishima and Honda in the early 1970s, various semiconductors have been intensively studied as photoelectrodes for efficient solar-to-hydrogen conversion in the past four decades. The key issue to achieve high energy conversion efficiency is to pursue and design a suitable semicond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B1/55C25B11/051C25B11/069C25B11/091Y02E60/36Y02P20/133
Inventor 何丹农卢静白仕亨涂兴龙葛美英金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH