Method for depositing metal nanoparticles on a textile web by photocatalysis, and corresponding textile web

Patent metadata

Field	Value
Publication number	US-2022220027-A1
Application number	US-202017613110-A
Country	US
Kind code	A1
Filing date	May 5, 2020
Priority date	May 23, 2019
Publication date	Jul 14, 2022
Grant date	—

Abstract

The invention relates to a method for depositing metal particles on a textile support, which comprises:placing at least one textile sheet (1) made of side-emitting optical fibers (2) in contact with a solution containing at least one ionic precursor of a metal to be deposited, the textile sheet (1) being formed from optical fibers (2) woven in warp and/or weft with binding threads in warp and/or weft, each of the optical fibers (2) having invasive alterations (5) along the fiber and allowing the emission of light propagating in the fiber at these alterations (5), the textile sheet (1) being coated on all or part of the surfaces thereof with a layer of semiconductor particles (4) having photocatalytic properties, the textile sheet (1) and the solution being contained in a space of a reactor (9), the space being free of oxygen;illuminating the textile sheet (1) by at least one light source (7) connected to all or part of the free ends (6) of the optical fibers (2), the light source generating light radiation suitable for activating the photocatalysis of the semiconductor inducing the deposition of metal particles on the photocatalytic layer (4).

First claim

1 . Method for depositing metal particles on a textile support, characterized in that it comprises:
bringing at least one side-emitting fiber optic-based ( 2 ) textile sheet ( 1 ) into contact with a solution containing at least one ionic precursor of a metal to be deposited; the textile sheet ( 1 ) being formed of warp and/or weft optical fibers ( 2 ) woven with warp and/or weft binding threads, each of the optical fibers ( 2 ) having invasive alterations ( 5 ) along the fiber and that allow light propagation within the fiber to be emitted at these alterations ( 5 ), the textile sheet ( 1 ) being coated on all or part of its surfaces with a layer of semiconducting particles ( 4 ) having photocatalytic properties, the textile sheet ( 1 ) and the solution being contained in a reactor chamber ( 9 ), the chamber being free of oxygen; illumination of the textile sheet ( 1 ) by at least one light source ( 7 ) connected to all or part of the free ends ( 6 ) of the optical fibers ( 2 ), said light source generating a light radiation adapted to activate the photocatalysis of the semi-conductor inducing the deposition of metallic particles on the photocatalytic layer ( 4 ).

2 . Method according to claim 1 , further comprising:
immersion of the textile sheet ( 1 ) in a solvent selected from water and/or an alcohol, placed in the reactor chamber ( 9 ); removal of oxygen present in the chamber of the reactor ( 9 ); said contact made by injecting the ionic precursor of the metal to be deposited into the solvent; homogenization of the precursor particles in the solvent; and said illumination of the textile sheet ( 1 ).

3 . Method according to claim 1 , wherein the free ends ( 6 ) of all the optical fibers ( 2 ) of the textile sheet ( 1 ) simultaneously receive said light radiation inducing deposition of metallic particles on all the surfaces of the textile sheet ( 1 ) in contact with the solution.

4 . Method according to claim 1 , wherein the light radiation is injected simultaneously at the ends of a group of optical fibers ( 2 ) of the textile sheet ( 1 ), inducing the localized deposition of metal particles on the textile sheet ( 1 ).

5 . Method according to claim 4 , further comprising, after said localized deposition:
injecting another type of metal to be deposited into the precursor solvent; and injecting light radiation at the free ends of another group of optical fibers, the light radiation being adapted to activate the photocatalysis of the semiconductor, inducing the localized deposition of the metal particles of said other metal on the textile sheet.

6 . Method according to claim 1 , wherein the layer of semi-conductive particles ( 4 ) comprises titanium dioxide particles.

7 . Method according to claim 1 , wherein the textile sheet further comprises a silica-based protective layer under the layer of semi-conductive particles ( 4 ).

8 . Method according to claim 1 , wherein the metal particles to be deposited are selected from the group comprising platinum (Pt), nickel (Ni), silver (Ag), gold (Au), copper (Cu), ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Jr).

9 . Method according to claim 1 , wherein the metal particles to be deposited are platinum (Pt) or nickel (Ni) particles.

10 . Method according to claim 1 , wherein the metal particles to be deposited are selected from the group comprising silver (Ag), gold (Au) and copper (Cu).

11 . Textile sheet coated with metallic particles obtained by the method according to claim 1 .

12 . Application of the textile sheet according to claim 11 , for the production of hydrogen or for the treatment of organic molecules present in a liquid or gaseous medium.

Assignees

• Brochier Tech
• Centre Nat Rech Scient
• Univ Claude Bernard Lyon

Inventors

• Puzenat Eric
• Brochier Cédric
• Lorito Davide
• Lamaa Lina
• Peruchon Laure

Classifications

• G02B6/001

  the light being emitted along at least a portion of the lateral surface of the fibre · CPC title

• C03C25/1095

  to obtain coated fabrics · CPC title

• D10B2401/20

  optical · CPC title

• C03C2217/255

  Au · CPC title

• D03D1/00

  Woven fabrics designed to make specified articles · CPC title