Unlock instant, AI-driven research and patent intelligence for your innovation.

A copper-zinc-tin-sulfur single crystal particle film and photoelectrochemical total decomposition pure water device

A single crystal particle, copper-zinc-tin-sulfur technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of reduced recombination, easy recombination of electrons and holes, and small illuminated area, so as to improve conversion Efficiency, avoiding the effect of the separation process

Active Publication Date: 2020-01-03
LINGNAN NORMAL UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of method (1) is that the device is simple, and the catalyst is fully in contact with water. The disadvantage is that the generated hydrogen and oxygen are mixed together, and the photo-excited electron holes are easy to recombine.
The advantage of method (2) is that hydrogen and oxygen are easily separated at the two electrodes, and the generated electron holes can also be separated quickly under bias voltage to reduce recombination. The disadvantage is that the device is complicated and the illumination area is small

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A copper-zinc-tin-sulfur single crystal particle film and photoelectrochemical total decomposition pure water device
  • A copper-zinc-tin-sulfur single crystal particle film and photoelectrochemical total decomposition pure water device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1) Preparation of CuZnSnS single crystal particle film:

[0070] 1. Weigh 15g of CZTS single crystal particles prepared by the molten salt method with a particle size of about 31-42μm.

[0071] 2. Prepare a layer of gum arabic film on the glass substrate by pulling method.

[0072] 3. Mix the polyurethane adhesive with the ethanol solution containing 6wt.% perfluorosulfonic acid at a mass ratio of 1:1 to obtain an adhesive containing an ionic conductor, and let it evaporate ethanol at 60°C until the viscosity is restored. Perfluorosulfonic acid Accounting for 5.66% of the total mass of the adhesive. Mix the above copper zinc tin sulfur single crystal particles evenly in the adhesive, the volume ratio of copper zinc tin sulfur single crystal particles to the adhesive is 1:1.2, and add the copper zinc tin sulfur single crystal particles and the mass of the adhesive A total of 0.1% polyacrylamide dispersant, and then, the mixture of copper-zinc-tin-sulfur single crystal...

Embodiment 2

[0079]The difference from Example 1 is that the particle size of CZTS single crystal particles is 42-57 μm, and the coating thickness of the mixture of CZTS single crystal particles, adhesive and dispersant is about 70 μm, and the others are the same as in Example 1.

[0080] The hydrogen production activity of CZTS single crystal particle film is 27.3μmol•g -1 •h -1 .

Embodiment 3

[0082] The difference from Example 1 is that the particle size of CZTS single crystal particles is 57-75 μm, and the coating thickness of the mixture of CZTS single crystal particles, adhesive and dispersant is about 95 μm, and the others are the same as in Example 1.

[0083] The hydrogen production activity of CZTS single crystal particle film is 14.1μmol•g -1 •h -1 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a monocrystal granular membrane of copper, zinc, tin and sulfur and a photoelectrochemical full-decomposition pure water device. A preparation method of the monocrystal granular membrane of copper, zinc, tin and sulfur includes the following steps of S1, evenly mixing monocrystal granules of copper, zinc, tin and sulfur with an adhesive containing ion conductors and then adding a dispersant; S2, preparing an Arabic gum thin film on a liner, coating the Arabic gum thin film with a mixture of the monocrystal granules of copper, zinc, tin and sulfur, the adhesive and the dispersant, and then obtaining the monocrystal granular membrane of copper, zinc, tin and sulfur, wherein the monocrystal granules of copper, zinc, tin and sulfur are distributed on one layer, and thetwo side faces of each monocrystal granule are exposed after the monocrystal granules are solidified and then etched. Under an illumination condition, generated photoproduced electrons and holes in the monocrystal granules of copper, zinc, tin and sulfur are separated to the two surfaces of the monocrystal granular membrane of copper, zinc, tin and sulfur under the action of an external electric field, recombination of the photoproduced electrons in a bulk phase or a surface phase is reduced, the conversion efficiency of photocatalytic hydrogen preparation is improved, and hydrogen and oxygenare generated on the two surfaces of the monocrystal granular membrane of copper, zinc, tin and sulfur respectively.

Description

technical field [0001] The invention relates to the technical field of clean and renewable new energy, and more specifically, to a copper-zinc-tin-sulfur single crystal particle film and a photoelectrochemical total decomposition pure water device. Background technique [0002] Cu 2 ZnSnS 4 (CZTS) is an important direct bandgap semiconductor material with a bandgap width of about 1.5eV. Its absorption spectrum matches the solar spectrum well and has a large light absorption coefficient. It is expected to become an efficient photocatalytic hydrogen production material. And CZTS is a non-toxic, green and cheap material. Compared with other catalytic hydrogen production materials, it effectively overcomes the toxicity and easy decomposition of Cd element in CdS and the scarcity and price of In and Ga elements in CuInGaSe2 (CIGS). The disadvantage of being expensive is expected to be widely promoted and applied in various fields such as energy preparation, industrial productio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B29/64C30B1/10
CPCC30B1/10C30B29/46C30B29/64
Inventor 张军俸靖杰廖峻邵乐喜薛书文李达
Owner LINGNAN NORMAL UNIV