Solar water evaporation purification and decomposition device

A water evaporation and solar energy technology, which is applied in the fields of material chemistry and solar energy conversion, can solve the problems of lack of design and research of integrated photocatalytic hydrogen production device, and achieve the effects of improving solar photothermal conversion efficiency, simple preparation process and low cost.

Active Publication Date: 2018-04-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on photocatalytic water splitting mainly focuses on powder catalysts, and the research on the design of integrated photocatalytic hydrogen production devices is relatively lacking.

Method used

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  • Solar water evaporation purification and decomposition device
  • Solar water evaporation purification and decomposition device
  • Solar water evaporation purification and decomposition device

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Using oleylamine as the reaction solvent and surfactant, copper acetate, stannous chloride, and selenium dioxide as reactants, a one-pot thermal decomposition method was used to synthesize hydrophobic Cu 2 SnSe 3 porous nanospheres. Will Cu 2 SnSe 3 After the porous nanospheres are centrifugally cleaned, they are dispersed in cyclohexane and vacuum filtered onto the hydrophilic mixed cellulose membrane to form a hydrophilic / hydrophobic double-layer evaporation structure as the evaporation layer (3) / light-to-heat conversion and solute barrier layer (4). Polyurethane foam is used as the floating and insulating layer (2), and a water-absorbing non-woven fabric is used as the water supply line (1).

[0029] see figure 2 , an obvious double-layer structure with abundant channels was observed by scanning electron microscope;

[0030] see image 3 , Bohai sea water evaporation results show that the device has a stable evaporation rate;

[0031] see Figure 4 , Figu...

Embodiment 2

[0033] P25TiO was screen-printed 2 Coated with CdTe slurry on the porous water-absorbing ceramic sheet, and formed a porous layer after annealing. The uppermost layer material is hydrophobically modified with heptadecafluorodecyltrimethoxysilane solution to form a hydrophilic / hydrophobic double-layer evaporation structure as the evaporation layer (3) / light-to-heat conversion and solute blocking layer (4). Polystyrene foam is used as the floating and insulating layer (2), and absorbent filter paper is used as the water supply line (1).

Embodiment 3

[0035] Hexadecylamine is used as surfactant, ethylene glycol is used as solvent, cupric chloride, zinc acetate, stannous chloride, and thiourea are used as raw materials, and sol-gel method is used to spin-coat on the surface of hydrophilic filter paper, and it is formed after heat treatment. Hydrophobic Cu 2 ZnSnS 4 The porous layer forms a hydrophilic / hydrophobic double-layer evaporation structure as an evaporation layer (3) / light-to-heat conversion and solute blocking layer (4). Polyethylene foam is used as the floating and insulating layer (2), and absorbent cotton is used as the water supply line (1).

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Abstract

The invention discloses a solar water evaporation purification and decomposition device which comprises a water supply line, a float and heat insulation layer, an evaporation layer and a photothermalconversion and solute barrier layer which are connected in sequence from bottom to top. The water supply line enables water to pass through the float and heat insulation layer, and the water is pumpedinto the evaporation layer by virtue of a capillary action; solar energy absorbed by the photothermal conversion and solute barrier layer is converted into heat, and water is heated to be vaporized into water vapor from the evaporation layer; due to pore channel volatilization of the photothermal conversion and solute barrier layer, partial water vapor is decomposed to produce hydrogen and oxygen; since the photothermal conversion and solute barrier layer contains a hydrophobic part and is not infiltrated by water, the solar energy can directly heat a heat-absorbing material only, but not heat water, so that high photothermal conversion efficiency is realized; and meanwhile, the solute in the water is prevented from being separated out on the membrane, and sea water desalination, sewage purification and water decomposition can be realized. Due to the design of a hydrophilic/hydrophobic double-layer evaporation structure, the solar water evaporation purification and decomposition device with high photothermal conversion efficiency and high stability is obtained.

Description

technical field [0001] The invention belongs to the technical fields of material chemistry and solar energy conversion, and in particular relates to a solar water evaporation purification and decomposition device. Background technique [0002] With the rapid development of industrialization, energy and environmental issues have become two major factors restricting the development of human society. The acquisition of fresh water resources and clean energy is very important. Among them, seawater desalination to obtain fresh water, sewage treatment and hydrogen energy have become the current research hotspots. Seawater covers 70.8% of the earth's surface, accounting for 97% of the world's water, and is considered an unlimited water resource. At present, membrane and thermal seawater desalination have been put into practical use and produced a large amount of fresh water. However, these two technologies have problems such as complex pretreatment, large energy consumption, and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/14C01B3/04C01B13/02C02F103/08
CPCC01B3/045C01B13/0207C01B2203/0266C02F1/048C02F1/14C02F2103/08Y02E60/36Y02P20/133Y02A20/124Y02A20/142Y02A20/212
Inventor 阙文修杨亚威杜亚平
Owner XI AN JIAOTONG UNIV
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