Carbon doped tin disulphide and methods for synthesizing the same

Patent metadata

Field	Value
Publication number	US-10967361-B2
Application number	US-201815940122-A
Country	US
Kind code	B2
Filing date	Mar 29, 2018
Priority date	Mar 31, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

Disclosed herein are carbon doped tin disulphide (C—SnS2) and other SnS2 composites as visible light photocatalyst for CO2 reduction to solar fuels. The in situ carbon doped SnS2 photocatalyst provide higher efficiency than the undoped pure SnS2. Also disclosed herein are methods for preparing the catalysts.

First claim

What is claimed is:

1. A photocatalyst, comprising
a carbon doped tin sulfide, which is represented by formula I
C—SnS x   (I),

wherein 1.5≤x≤2.

2. The photocatalyst of claim 1 , having a nanostructure which is selected from the group consisting of sheet type, flower type, sphere type, needle shape and a mixture thereof.

3. The photocatalyst of claim 2 , having a nanostructure with a dimension ranging from 3 to 300 nm in length and in diameter.

4. The photocatalyst of claim 1 , further comprising
a co-catalyst which is selected from the group consisting of metal, metal oxide, and metal sulfide and a mixture thereof, and
wherein the co-catalyst is deposited on the carbon doped tin sulfide.

5. The photocatalyst of claim 4 , wherein the co-catalyst is selected from the group consisting of Ag, Cu, Au, Pt, Ni, Zn, TiO 2 , ZnO, WO 3 , Cu 2 O, CuO, SnO 2 , CdS, MoS 2 , ZnS, NiS and a mixture thereof.

6. The photocatalyst of claim 1 , wherein contents of Sn, S and C are 29.49-37.23, 55.32-57.69 and 7.45-12.82 atomic %, respectively.

7. The photocatalyst of claim 6 , wherein the photocatalyst is SnS 1.95 C 0.43 or SnS 1.49 C 0.2 .

8. The photocatalyst of claim 1 , wherein the carbon doped tin sulfide is carbon doped tin disulphide (C—SnS 2 ) which is in a size of nanometer scale, and the photocatalyst has a sheet structure.

9. The photocatalyst of claim 8 , wherein the carbon doped tin disulphide has a size of 3-300 nm.

10. The photocatalyst of claim 8 , wherein the carbon doped tin disulphide has a carbon content ranging from 0.5% to 20%.

Assignees

• Academia Sinica
• Univ Nat Taiwan

Inventors

• Chen Kuei-Hsien
• Shown Indrajit
• Chen Wei-Fu
• Chen Lin Li-Chyong

Classifications

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J35/45

  Nanoparticles · CPC title