Ion removal devices based on electrochemistry and photo-electrochemistry, and preparation method and application

Patent metadata

Field	Value
Publication number	US-12384701-B2
Application number	US-201917629794-A
Country	US
Kind code	B2
Filing date	Mar 27, 2019
Priority date	Mar 28, 2018
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An ion removal device based on electrochemical and photoelectrochemical methods, and the application of energy conversion and storage are provided. In the ion removal process based on the electrochemical and photoelectrochemical fluidization battery device, the positive active material in the flow battery is the positive pole of device, the negative active material in the fluid battery is the negative pole of the device, and the salt solution is the electrolyte in the middle stream. The positive and negative active materials include organic materials such as 4-hydroxy-piperidinol oxide, riboflavin sodium phosphate or methyl viologen, which have the advantages of low raw material cost, environmental friendliness, high sustainability, excellent electrochemical performance, high specific capacity and good cycle stability etc. The electrolyte can be separated from the positive and negative active liquid flow materials according to the fixed sequence of self-assembly of fluid battery mold.

First claim

What is claimed is:

1. A method for a continuous desalination by a light-driven electrochemical catalysis, wherein
a conductive glass with a photosensitive semiconductor material is configured as a photoelectrochemical catalysis device, and under light conditions, photoelectrons are generated to drive a desalination reaction, continuously desalinating by means of an ion exchange;
positive and negative active materials of a battery comprise one or more than one selected from the group consisting of TEMPO, carbon nanotube-TEMPO, graphene-TEMPO, graphene oxide-TEMPO, polymer-TEMPO, methyl viologen dichloride hydrate, riboflavin-5′-phosphate sodium salt dehydrate, an Ag/AgCl solution, LiCoO 2 , LiMn 2 O 4 , Bi/BiOCl, Sb/SbOCl, LiMn 2 O 4 /NaTi 2 (PO 4 ) 3 , Zn/VS 2 , K 0.27 MnO 2 , Na 2 FeP 2 O 7 , V 2 O 5 , Na 3 V 2 (PO 4 ) 3 , Na 2 V 6 O 16 , Na 0.44 MnO 2 , NaTi 2 (PO 4 ) 3 , PTFE, PBA, Na 2 C 8 H 4 O 4 , PVA, Na 0.44 [Mn 1-x Ti x ]O 2 , Bi, BiF 3 , Pb, PbF 2 , piperidine inorganic substances, and bipyridinium salts; and
the positive and negative active materials of the battery further comprise one or more than one of polyamide, manganese oxide, and prussian blue Fe 4 [Fe(CN) 6 ] 3 .

2. The method for the continuous desalination by the light-driven electrochemical catalysis according to claim 1 , wherein the photosensitive semiconductor material comprises one selected from the group consisting of dye semiconductors, quantum dot semiconductors, elemental semiconductors, inorganic compound semiconductors, organic compound semiconductors, amorphous semiconductors, and liquid semiconductors.

3. The method for the continuous desalination by the light-driven electrochemical catalysis according to claim 1 , wherein the piperidine inorganic substances comprise 2-hydroxypyrimidine; the bipyridinium salts comprise 4′-dipyridinium dichloride.

4. A method for a continuous desalination by a light-driven electrochemical catalysis, wherein
a conductive glass with a photosensitive semiconductor material is configured as a photoelectrochemical catalysis device, and under light conditions, photoelectrons are generated to drive a desalination reaction, continuously desalinating by means of an ion exchange; and
the photosensitive semiconductor material further comprises a two-dimensional semiconductor material, and the two-dimensional semiconductor material comprises MoS 2 , and MoSe 2 .

5. A method for a continuous desalination by a light-driven electrochemical catalysis, wherein
a conductive glass with a photosensitive semiconductor material is configured as a photoelectrochemical catalysis device, and under light conditions, photoelectrons are generated to drive a desalination reaction, continuously desalinating by means of an ion exchange; and
a photosensitive semiconductor is one of a solid phase, a liquid phase or a solution phase; materials of the liquid phase or the solution phase comprise one or more than one selected from the group consisting of azure C, thionine, azure A, azure B, and methylene blue.

6. The method for the continuous desalination by the light-driven electrochemical catalysis according to claim 1 , wherein the conductive glass is configured as a light window and comprises ITO or FTO; dense layer semiconductor materials is coated on a surface of the conductive glass, dense layer semiconductors comprise TiO 2 , ZnO, SrTiO 3 , Co 3 O 4 , CuO, ZnS, SiC, Cu 2 O, BaTiO 3 , Bi 2 O 3 , Sb 2 S 3 , ZnSe, PtTe 2 , WTe 2 , MoTe 2 , SnS 2 , Bi 4 Ti 5 O 12 , BiOI, Bi 2 WO 6 , Fe 2 O 3 and WO 3 .

7. The method for the continuous desalination by the light-driven electrochemical catalysis according to claim 1 , wherein the positive and negative active materials further comprise used one or more than one selected from the group consisting of auxiliary conductive additives NaCl, NaF, Na 2 SO 4 , KCl, CNT, GO, activated carbon, conductive carbon materials, ion exchange resins, and insoluble materials.

8. The method for the continuous desalination by the light-driven electrochemical catalysis according to claim 1 , wherein the conductive glass with the photosensitive semiconductor material is prepared by the following method:
(a) cleaning an FTO glass;
(b) preparing a transition layer on the FTO glass pre-treated in step (a);
(c) mixing and grinding a TiO 2 powder, PEG, PEO, acetylacetone and a few drops of Triton X-100 in a mortar, diluting with distilled water, then sonicating and stirring overnight, then coating on the FTO glass with the transition layer obtained in step (b), and finally heating;
(d) putting the FTO glass obtained in step (c) into a TiO 2 solution for a treatment, and then heating the treated FTO glass;
(e) dissolving a LEG4 dye in acetonitrile to prepare a dye solution, then putting the FTO glass obtained in step (d) into the dye solution and soaking for 12 to 14 hours, then taking the FTO glass out and cleaning with alcohol to obtain the conductive glass with the photosensitive semiconductor material.

Assignees

• Univ South China Normal

Inventors

• Chen Fuming

Classifications

• C02F2305/10

  Photocatalysts · CPC title

• C02F2201/46165

  Special power supply, e.g. solar energy or batteries · CPC title

• C02F2201/46115

  Electrolytic cell with membranes or diaphragms · CPC title

• C02F2103/08

  Seawater, e.g. for desalination · CPC title

• C02F2001/46133

  characterised by the material · CPC title