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

A kind of inorganic sulfur ligand semiconductor nanocrystal sol, photocatalytic system and application thereof

A semiconductor and inorganic sulfur technology, applied in the field of photocatalytic hydrogen production, can solve the problems of difficult control of ligand exchange process, unfavorable photocatalytic reaction, waste of organic ligands, etc., to improve the efficiency of photoinduced hydrogen production, good repeatability, The effect of simple operation of the reaction

Active Publication Date: 2021-06-29
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, traditional organic ligands are not conducive to photocatalytic reactions, and although the recently studied inorganic ligand nanocrystals have achieved good results, their preparation must first be synthesized by organic ligand quantum dots, and then by ligand synthesis. exchange steps
Among them, multiple synthetic steps are relatively complicated, and the exchange process of ligands is also difficult to control.
In addition, during the preparation process, the organic ligands did not enter the catalytic system and were wasted.

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
  • A kind of inorganic sulfur ligand semiconductor nanocrystal sol, photocatalytic system and application thereof
  • A kind of inorganic sulfur ligand semiconductor nanocrystal sol, photocatalytic system and application thereof
  • A kind of inorganic sulfur ligand semiconductor nanocrystal sol, photocatalytic system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0062] Wherein, the synthesis method of the single-structure inorganic sulfur ligand semiconductor nanocrystalline sol comprises the following steps:

[0063] Configure sulfide ion precursor solution and metal precursor solution;

[0064] Add excess sulfide ion precursor solution to the metal precursor solution, and react under heating conditions;

[0065] The synthesis method of the solid solution inorganic sulfur ligand semiconductor nanocrystal sol comprises the following steps:

[0066] Configure a sulfide ion precursor solution and include two metal precursor solutions;

[0067] Add the excess sulfide ion precursor solution to the two metal precursor solutions, and react under heating conditions;

[0068] The synthetic method of described core-shell structure inorganic sulfur ligand semiconductor nanocrystal sol comprises the following steps:

[0069] Configure the sulfide ion precursor solution and the metal precursor solution in the nucleus;

[0070] Adding excess s...

Embodiment 1

[0098] A method for directly preparing an aqueous solution of single-structure inorganic sulfur ligand semiconductor nanocrystals, comprising the following steps:

[0099] Add 50mL water and 0.5mmol CdCl to a 100mL round bottom flask 2 2H 2 O precursor, heated to 80 degrees; additionally take 2.5mmol Na 2 S·9H 2 O was added to 5mL aqueous solution, and Na 2 After all the S is dissolved, the Na 2 The S solution was quickly added to the solution in the vigorously stirred round-bottomed flask, and the addition time was controlled within 2 seconds. Keep stirring and heating for 3 hours, stop the reaction, take out the solution and centrifuge to get the precipitate. The precipitate was washed 2-3 times with a mixed solution of ethanol and water with a volume ratio of 1:1. The purpose of washing with ethanol and water was to purify the synthesized inorganic sulfur ligand semiconductor nanocrystal sol and remove S 2- , Cd 2+ and other unreacted ions.

[0100] The purified ino...

Embodiment 2

[0102] A method for directly preparing an aqueous solution of core-shell structure inorganic sulfur ligand semiconductor nanocrystals, comprising the following steps:

[0103] In a 100mL round bottom flask, add 50mL water, 0.5mmol CdCl 2 2.5H 2 O precursor, heated to 80 degrees; additionally take 2.5mmol Na 2 S·9H 2 O was added to 5mL aqueous solution, and Na 2 After all the S is dissolved, the Na 2 The S solution was quickly added to the solution in the above-mentioned round bottom flask which was stirred vigorously. Stirring and heating were maintained for 2 hours. Another 0.25mmol ZnCl 2 2H 2 O was added to 5mL aqueous solution, and the ZnCl 2 After all dissolved, this ZnCl 2 The solution was slowly added dropwise to the solution in the above round bottom flask which was stirred vigorously. Adding time is controlled in about 5 minutes. Wait for ZnCl 2 After the solution was completely added, the reaction was continued for 1 hour, then the reaction was stopped, a...

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

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an inorganic sulfur ligand semiconductor nanocrystal sol, a photocatalytic system and applications thereof. The invention firstly discloses a synthesis method of inorganic sulfur ligand semiconductor nanocrystal sol, including adding excess sulfur ion precursor solution to metal ion precursor solution to directly prepare inorganic sulfur ligand semiconductor nanocrystal sol. The invention further provides a photocatalytic system. The synthesis process of the inorganic sulfur ligand semiconductor nanocrystal sol of the present invention does not require organic ligands, and the single structure, solid solution and core-shell structure inorganic sulfur ligand semiconductor nanocrystal sol can be easily realized by changing the reaction conditions and adding excessive sulfur ions The prepared inorganic sulfur ligand semiconductor nanocrystalline sol has good water solubility, which is conducive to the in-situ addition of inorganic transition metals, and can realize the rapid transfer of photogenerated electrons from the photosensitive unit to the catalytic unit and the photogenerated holes from the photosensitive unit to the bioactive unit. The rapid transfer of substances can improve the efficiency of photoinduced hydrogen production.

Description

technical field [0001] The invention relates to the technical field of photocatalytic hydrogen production. More specifically, it relates to an inorganic sulfur ligand semiconductor nanocrystal sol, a photocatalytic system and applications thereof. Background technique [0002] With the excessive consumption of fossil energy and the environmental pollution caused by it is becoming more and more serious, the human demand for renewable and clean energy is getting higher and higher. Among various renewable and clean energy sources, hydrogen has the characteristics of no pollution and high calorific value, and has attracted widespread attention. [0003] In order to prepare hydrogen conveniently, it is proposed that photosynthesis in nature can be simulated, and solar energy can be stored in the form of chemical energy. In 1972, Japanese scientists successfully decomposed water into hydrogen and oxygen through photoelectrochemical cells, which opened the prelude to the artifici...

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 Patents(China)
IPC IPC(8): B01J27/04B01J35/10B82Y40/00B82Y30/00C01B3/22
CPCB82Y30/00B82Y40/00C01B3/22B01J27/04C01B2203/0227C01B2203/1217B01J35/23B01J35/61B01J35/39
Inventor 张丽萍樊祥冰吴骊珠李旭兵高雨季
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI