Unlock instant, AI-driven research and patent intelligence for your innovation.

Zn-Sn-O-S four-component photocatalyst as well as preparation method and application thereof

A zn-sn-o-s, photocatalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of sulfur oxidation, photocorrosion, low photocatalytic efficiency, etc. The effect of corrosion, good light absorption, and simple process method

Pending Publication Date: 2022-07-15
GUANGDONG NANFANG SODA ASH IND +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sulfide has obvious disadvantages as a catalyst: on the one hand, photogenerated carriers in tin sulfide are easy to recombine, resulting in low photocatalytic efficiency; on the other hand, sulfur is easily oxidized by photogenerated holes during the photocatalytic process of tin sulfide, photocorrosion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zn-Sn-O-S four-component photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a Zn-Sn-O-S four-component photocatalyst, comprising the following steps:

[0030] (1) Dissolve 0.01 mol of hydrozinite (5.47 g), 0.02 mol of tin tetrachloride and 0.05 mol of thiourea (the molar ratio of hydrozinite, tin tetrachloride and thiourea is 1:2:5) In 100mL of 0.5M sodium hydroxide solution, ultrasonically dispersed for 15min to obtain a mixed solution. The mixed solution was then transferred to a 150 mL polytetrafluoroethylene liner, and the liner was put into a stainless steel hydrothermal kettle, and the hydrothermal kettle was placed in a 150° C. oven for 48 hours of reaction. After the reaction, it was naturally cooled to room temperature, the product was separated by filtration, washed twice with 3M sodium hydroxide solution, and then washed twice with a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and then the product was placed at 100 ° C. Dry in an oven for 10 h to obtain a composite catalyst precu...

Embodiment 2

[0033] A preparation method of a Zn-Sn-O-S four-component photocatalyst, comprising the following steps:

[0034](1) Dissolve 0.01 mol of hydrozinite (5.47 g), 0.05 mol of tin tetrachloride and 0.15 mol of thiourea (the molar ratio of hydrozinite, tin tetrachloride and thiourea is 1:5:15) In 100 mL of 1.0 M sodium hydroxide solution, ultrasonically dispersed for 15 min to obtain a mixed solution. The mixed solution was then transferred to a 150 mL polytetrafluoroethylene liner, and the liner was put into a stainless steel hydrothermal kettle, and the hydrothermal kettle was placed in a 200° C. oven for reaction for 24 hours. After the reaction, it was naturally cooled to room temperature, and the product was separated by filtration, washed twice with 3M sodium hydroxide solution, and then washed twice with a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and placed the product in a 100°C oven. After drying for 8 h, the composite catalyst precursor w...

Embodiment 3

[0037] A preparation method of a Zn-Sn-O-S four-component photocatalyst, comprising the following steps:

[0038] (1) Dissolve 0.01 mol of hydrozinite (5.47 g), 0.03 mol of tin tetrachloride and 0.10 mol of thiourea (the molar ratio of hydrozinite, tin tetrachloride and thiourea is 1:3:10) In 100mL of 0.5M sodium hydroxide solution, ultrasonically dispersed for 15min to obtain a mixed solution. The mixed solution was then transferred to a 150 mL polytetrafluoroethylene liner, and the liner was put into a stainless steel hydrothermal kettle, and the hydrothermal kettle was placed in a 160° C. oven for reaction for 36 hours. After the reaction, it was naturally cooled to room temperature, and the product was separated by filtration, washed twice with 3M sodium hydroxide solution, and then washed twice with a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and placed the product in a 100°C oven. Drying in medium for 12h, the composite catalyst precursor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a Zn-Sn-O-S four-component photocatalyst as well as a preparation method and application thereof, and belongs to the field of composite material preparation. According to the Zn-Sn-O-S four-component photocatalyst provided by the invention, the molecular formula of the Zn-Sn-O-S four-component photocatalyst is Zn2SnO4-xSx, and x is equal to 0.5 to 3.5; the preparation method comprises the following steps: dissolving hydrozincite, stannic chloride and thiourea in an alkali solution, dispersing to obtain a mixed solution, carrying out hydrothermal reaction, cooling to separate solids, washing and drying to obtain a catalyst precursor; and carrying out heat treatment on the obtained catalyst precursor in an inert atmosphere, and cooling to obtain the Zn-Sn-O-S four-component photocatalyst. The product is obtained through two steps of a hydrothermal method and a calcination method, operation is easy and convenient, cost is low, industrial production value is achieved, and the prepared Zn-Sn-O-S four-component photocatalyst is stable in structure, has high activity of preparing hydrogen through photocatalytic decomposition of water and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a Zn-Sn-O-S four-component photocatalyst and a preparation method and application thereof. Background technique [0002] Zinc oxide (ZnO) and zinc sulfide (ZnS) have low photocatalytic activity due to their wide band gaps of about 3.3-3.6 eV, so that they can only utilize the ultraviolet part of sunlight. Tin Sulfide (SnS 2 ) has a narrow forbidden band width of about 2.1eV, which can utilize ultraviolet light in sunlight, and the energy band structure of this material matches the potential of water reduction for hydrogen production and water oxidation for oxygen production, and has the potential for hydrogen production from water splitting. potential. However, this sulfide has obvious disadvantages as a catalyst: on the one hand, photogenerated carriers in tin sulfide are easy to recombine, resulting in low photocatalytic efficiency; on the other hand,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/00B01J37/10B01J37/20C01B3/04
CPCB01J27/04B01J37/10B01J37/20C01B3/042B01J35/39
Inventor 梁尔希匡勇娇彭峰曾松峰冯伟东
Owner GUANGDONG NANFANG SODA ASH IND