P-type TiO2/n-type WO3 heterojunction catalyst, its preparation and use in photochemical synthesis of fuels

Patent metadata

Field	Value
Publication number	US-11524276-B2
Application number	US-202017060770-A
Country	US
Kind code	B2
Filing date	Oct 1, 2020
Priority date	Apr 17, 2020
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

Provided is a p-type TiO 2 /n-type WO 3 heterojunction catalyst and a preparation method and use thereof. The catalyst comprises p-type TiO 2 and n-type WO 3 supported on a surface of the p-type TiO 2 .

First claim

What is claimed is:

1. A p-type TiO 2 /n-type WO 3 heterojunction catalyst comprising:
p-type TiO 2 ; and n-type WO 3 supported on a surface of the p-type TiO 2 ;
wherein the p-type TiO 2 /n-type WO 3 heterojunction catalyst has a p-type TiO 2 content of 60% by mass to 80% by mass with respect to a total mass of the p-type TiO 2 /n-type WO 3 heterojunction catalyst.

2. A method for preparing the p-type TiO 2 /n-type WO 3 heterojunction catalyst according to claim 1 , the method comprising:
supporting the n-type WO 3 onto a surface of the p-type TiO 2 to obtain the p-type TiO 2 /n-type WO 3 heterojunction catalyst.

3. The method according to claim 2 , further comprising:
dissolving a titanium salt in a mixed solution of glycerol and a first alcohol to form a first mixture;
dissolving a tungsten salt and a product resulting from a first heating process for heating the first mixture in a second alcohol to form a second mixture; and
calcining a product resulting from a second heating process for heating the second mixture to produce the p-type TiO 2 /n-type WO 3 heterojunction catalyst.

4. The method according to claim 3 , wherein the first heating process is carried out at a temperature of 50° C. to 250° C. for 1 hour to 48 hours;
wherein the first alcohol comprises at least one of methanol, ethanol, propanol, and isopropanol;
wherein the titanium salt comprises at least one of titanium acetate, titanium oxalate, titanium chloride, tetrabutyl titanate, titanium nitrate, and titanium sulfate;
wherein the second heating process is carried out at a temperature of 50° C. to 250° C. for 1 hour to 48 hours;
wherein the calcining step is carried out at a temperature of 200° C. to 800° C. for 2 hours to 24 hours;
wherein the tungsten salt comprises at least one of tungsten chloride, ammonium tungstate, ammonium metatungstate, and ammonium paratungstate; and
wherein the second alcohol comprises at least one of methanol, ethanol, propanol, and isopropanol.

5. A method of producing a fuel, the method comprising:
photochemically synthesizing the fuel from a fuel substrate in the presence of the p-type TiO 2 /n-type WO 3 heterojunction catalyst of claim 1 .

6. The method according to claim 5 , wherein photochemically synthesizing the fuel from the fuel substrate is carried out under light irradiation; wherein the fuel substrate comprises at least one of norbornene, dicylopentadiene, norbornadiene, isophorone, and cyclohexenone;
and wherein an amount of the p-type TiO 2 /n-type WO 3 heterojunction catalyst is from 1% by mass to 10% by mass with respect to a total amount of the fuel substrate.

7. The method according to claim 6 , wherein the fuel is photochemically synthesized from the fuel substrate in a solvent;
wherein the solvent comprises at least one of dichloromethane, normal pentane, dichloroethane, and cyclohexane.

8. The method according to claim 6 , wherein photochemically synthesizing the fuel from the fuel substrate in the presence of the p-type TiO 2 /n-type WO 3 heterojunction catalyst is carried out at a temperature of 0° C. to 80° C. for 1 hour to 24 hours under irradiation of a high-pressure mercury lamp.

9. The method according to claim 7 , wherein photochemically synthesizing the fuel from the fuel substrate in the presence of the p-type TiO 2 /n-type WO 3 heterojunction catalyst is carried out at a temperature of 0° C. to 80° C. for 1 hour to 24 hours under irradiation of a high-pressure mercury lamp.

10. The method according to claim 5 , wherein the fuel comprises a high-density fuel that is a multi-cyclic fuel for aerospace propulsion;
wherein the fuel comprises at least one of pentacyclo[8.2.1.1 4,7 .0 2,9 .0 8,3 ]tetradecane, pentacyclo[5.3.0.0 2,6 .0 3,9 .0 5,8 ]decane, and quadricyclane.

Assignees

• Univ Tianjin

Inventors

• Pan Lun
• Zou Jijun
• Chen Ying
• Zhang Xiangwen
• Wang Li

Classifications

• B01J23/30 Primary

  Tungsten · CPC title

• C10G32/00 Primary

  Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms · CPC title

• C10L1/04

  essentially based on blends of hydrocarbons · CPC title

• C10L2290/36

  Applying radiation such as microwave, IR, UV · CPC title

• B01J2523/47

  Titanium · CPC title