Hydrogen production composite material base on sulfide-based photo-electric bifunctional catalysis and preparation method thereof

A technology of bifunctional catalysis and composite materials, applied in the field of sulfide-based photo-electric bifunctional catalytic hydrogen production composite materials, can solve the problem of poor electrochemical performance of photocatalysts, side reactions of catalyst electrolytes, no electrochemical hydrogen production, etc. It can improve the efficiency of photodecomposition hydrogen production, improve electrochemical stability and service life, and improve the effect of photochemical activity.

Inactive Publication Date: 2020-01-10
广州市涂屋信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a composite material based on sulfide photo-electric dual-function catalytic hydrogen production and its preparation method, which solves the problems of poor electrical conductivity, easy catalyst and electrol

Method used

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preparation example Construction

[0026] Nano-MoS 2 The sheet preparation method comprises the following steps:

[0027] (1) Weigh MoS with a mass ratio of 1.5-2 2 Add the powder and NaCl powder into the planetary ball mill. The revolution speed of the ball mill is 50-70 rpm, and the rotation speed is 620-650 rpm. Perform ball milling for 6-7 hours. Add an appropriate amount of distilled water to the ball mill and continue to maintain the speed for ball milling for 5-6 h.

[0028] (2) Transfer the ball mill solution into a high-speed centrifuge at a centrifugal speed of 7000-8000 rpm, perform centrifugation for 4-6 times, remove the upper aqueous solution until the lower solid does not contain NaCl, and fully dry the lower solid to obtain nano-MoS 2 piece.

[0029] Ni-doped Co9 S 8 for Ni 0.5-2 co 7-8.5 S 8 , the preparation method comprises the following steps:

[0030] (1) Add ethylene glycol solvent to the reaction flask, then add NiCl 2 、CoCl 2 , NiCl 2 、CoCl 2 The molar ratio of the substance ...

Embodiment 1

[0036] (1) Preparation of nano-MoS 2 Sheet 1: Weigh MoS with a mass ratio of 1.5 2 The powder and NaCl powder were added to the planetary ball mill, the revolution speed of the ball mill was 50 rpm, and the rotation speed was 620 rpm, and the ball mill was carried out for 6 h, and an appropriate amount of distilled water was added to the ball mill, and the ball mill was continued for 5 h at the speed, and the ball mill solution was transferred into a high-speed In the centrifuge, the centrifugal speed is 7000 rpm, centrifuged 4 times, the upper aqueous solution is removed until the lower solid does not contain NaCl, and the lower solid is fully dried to obtain nano-MoS 2 slice 1.

[0037] (2) Preparation of Ni 0.5 co 8.5 S 8 Component 1: Add ethylene glycol solvent to the reaction flask, then add NiCl 2 、CoCl 2 , NiCl 2 、CoCl 2 The molar ratio of the substance is 1:17, the material is stirred until dissolved and then added ethylenediamine, CoCl 2 The molar ratio of et...

Embodiment 2

[0041] (1) Preparation of nano-MoS 2 Sheet 2: Weigh MoS with a mass ratio of 1.5 2 The powder and NaCl powder were added to the planetary ball mill, the revolution speed of the ball mill was 70 rpm, and the rotation speed was 620 rpm, and the ball mill was carried out for 7 h, and an appropriate amount of distilled water was added to the ball mill, and the ball mill was continued for 6 h at the speed, and the ball mill solution was transferred into a high-speed In the centrifuge, the centrifugal speed is 7000 rpm, centrifuged for 6 times, the upper aqueous solution is removed until the lower solid does not contain NaCl, and the lower solid is fully dried to obtain nano-MoS 2 slice 2.

[0042] (2) Preparation of Ni 0.7 co 8.3 S 8 Component 2: Add ethylene glycol solvent to the reaction flask, then add NiCl 2 、CoCl 2 , NiCl 2 、CoCl 2 The molar ratio of the substance is 1:11.8, the material is stirred until dissolved and then added ethylenediamine, CoCl 2 The molar ratio...

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Abstract

The invention relates to that technical field of photo-electrocatalytic hydrogen production, and discloses a sulfide-based photo-electric bifunctional catalytic hydrogen production composite materialand a preparation method thereof. The composite material comprises the following formula raw materials: nano MOS2 sheets, CD (CH3COO) 2.2H2O, thiourea, carbon nanotubes and Ni-doped Co9S8. According to the sulfide-based photo-electric bifunctional catalytic hydrogen-production composite material and the preparation method thereof, Ni doping enhance the conductivity of Co9S8, accelerates the transmission and diffusion process of electrons. The Ni-doped Co9S8 is coated by the carbon nanotubes; the side reaction between Co9S8 and an electrolyte is avoided; holes generated by CdS under optical radiation enter the valence band of MoS2; the recombination efficiency of photo-induced electrons and holes of CdS is reduced; the nano MoS2 has a good carrier mobility to inhibit the recombination of CdS photon-generated carriers; according to the preparation method disclosed by the invention, the electrocatalyst Ni-doped Co9S8 with is tightly coated by the carboxylated carbon nano tubes, and meanwhile, the photocatalyst CdS-MoS2 heterojunction is uniformly attached, so that the dual functionalization of photolysis-electrolysis of water to produce hydrogen of the composite material is realized.

Description

technical field [0001] The invention relates to the technical field of photo-electrocatalytic hydrogen production, in particular to a sulfide-based photo-electric dual-functional catalytic hydrogen production composite material and a preparation method thereof. Background technique [0002] Hydrogen is a clean energy with abundant resources and sustainable development. It has the characteristics of high combustion calorific value, good hydrogen combustion performance, and the combustion product is water. It is used in hydrogen power generation, hydrogen-powered vehicles, phosphate fuel cells, solid Oxide batteries and other aspects have a wide range of applications. At present, hydrogen production mainly includes biological hydrogen production, reforming hydrogen production, chemical hydride hydrogen production, and water decomposition hydrogen production. [0003] Hydrogen production by water splitting mainly includes photocatalytic hydrogen production and hydrogen producti...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J21/18C01B3/04C01G39/06B82Y40/00C01G53/11
CPCB01J21/185B01J27/0515B01J35/0013B01J35/0033B01J35/004B82Y40/00C01B3/042C01G39/06C01G53/11C01P2004/20Y02E60/36
Inventor 周丽丽
Owner 广州市涂屋信息科技有限公司
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