Method for modifying Ag-In-Zn-S quantum dots by ferrocene derivatives and application of Ag-In-Zn-S quantum dots

A ferrocene derivative, ag-in-zn-s technology, applied in chemical instruments and methods, hydrogen production, chemical/physical processes, etc., can solve problems such as low hole mobility and photocorrosion

Active Publication Date: 2021-05-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ag-In-Zn-S quantum dots have low hole mobility due to lattice defects, and are trapped by surface defects, resulting in photocorrosion.

Method used

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  • Method for modifying Ag-In-Zn-S quantum dots by ferrocene derivatives and application of Ag-In-Zn-S quantum dots
  • Method for modifying Ag-In-Zn-S quantum dots by ferrocene derivatives and application of Ag-In-Zn-S quantum dots
  • Method for modifying Ag-In-Zn-S quantum dots by ferrocene derivatives and application of Ag-In-Zn-S quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of Ag-In-Zn-S quantum dot precursor:

[0034] Weigh 0.17 mmol of silver nitrate, 1.7 mmol of indium nitrate, 0.85 mmol of zinc acetate dihydrate, and 5 mmol of L-cysteine, mix and dissolve in the aqueous solution, mix the above solutions and adjust the pH value of the solution to 8.5 with 1M NaOH, add thio Acetamide was ultrasonically stirred, and hydrothermally reacted in an autoclave at 110° C. for 4 hours. After the reaction was completed, it was centrifuged and washed to obtain Ag-In-Zn-S quantum dots.

[0035] (2) Preparation of Ag-In-Zn-S-FcA composite photocatalyst:

[0036] Extract 100 mg of AIZS quantum dots and mix them with 0.5 mg of ferrocenecarboxylic acid (solvent dimethyl sulfoxide, 1 mg / ml), and then hydrothermally treat them in an autoclave at 110°C for 4 hours.

[0037] Take 0.02 g of the catalyst and 0.528 g of L-ascorbic acid from the sample in (2) and add them to the photoreactor. 2After the gas in the bottle was exhausted, the cus...

Embodiment 2

[0039] (1) Preparation of Ag-In-Zn-S quantum dot precursor:

[0040] Weigh 0.34 mmol of silver nitrate, 1.7 mmol of indium nitrate, 0.85 mmol of zinc acetate dihydrate, and 5 mmol of L-cysteine, mix and dissolve in the aqueous solution, mix the above solutions and adjust the pH value of the solution to 8.5 with 1M NaOH, add thio Acetamide was ultrasonically stirred, and hydrothermally reacted in an autoclave at 110° C. for 4 hours. After the reaction was completed, it was centrifuged and washed to obtain Ag-In-Zn-S quantum dots.

[0041] (2) Preparation of Ag-In-Zn-S-FcA composite photocatalyst:

[0042] Extract 100 mg of AIZS quantum dots and mix them with 0.5 mg of ferrocenecarboxylic acid (solvent dimethyl sulfoxide, 1 mg / ml), and then hydrothermally treat them in an autoclave at 110°C for 4 hours.

[0043] Take 0.02 g of the catalyst and 0.528 g of L-ascorbic acid from the sample in (2) and add them to the photoreactor. 2 After the gas in the bottle was exhausted, the cu...

Embodiment 3

[0045] (1) Preparation of Ag-In-Zn-S quantum dot precursor:

[0046] Weigh 0.51 mmol of silver nitrate, 1.7 mmol of indium nitrate, 0.85 mmol of zinc acetate dihydrate, and 5 mmol of L-cysteine, mix and dissolve in the aqueous solution, mix the above solutions and adjust the pH value of the solution to 8.5 with 1M NaOH, add thio Acetamide was ultrasonically stirred, and hydrothermally reacted in an autoclave at 110° C. for 4 hours. After the reaction was completed, it was centrifuged and washed to obtain Ag-In-Zn-S quantum dots.

[0047] (2) Preparation of Ag-In-Zn-S-FcA composite photocatalyst:

[0048] Extract 100 mg of AIZS quantum dots and mix them with 0.5 mg of ferrocenecarboxylic acid (solvent dimethyl sulfoxide, 1 mg / ml), and then hydrothermally treat them in an autoclave at 110°C for 4 hours.

[0049] Take 0.02 g of the catalyst and 0.528 g of L-ascorbic acid from the sample in (2) and add them to the photoreactor. 2 After the gas in the bottle was exhausted, the cu...

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PUM

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Abstract

The invention belongs to the technical field of photocatalytic hydrogen production, and relates to an Ag-In-Zn-S quantum dot, in particular to a method for modifying the Ag-In-Zn-S quantum dot by a ferrocene derivative, which comprises the following steps: dispersing the Ag-In-Zn-S quantum dot in a ferrocene derivative solution with dimethyl sulfoxide as a solvent, carrying out uniform ultrasonic treatment, and carrying out hydrothermal reaction at 90-130 DEG C for 2-4 hours, wherein the mass ratio of the ferrocene derivative to the Ag-In-Zn-S quantum dots is (0.25-1) to 100. The prepared ferrocene derivative modified Ag-In-Zn-S quantum dot is good in dispersity and high in stability, and can be applied to photocatalytic hydrogen production. The photocatalytic performance and the stability of the AIZS quantum dots are improved by adopting a functional ligand quantum dot hydrothermal post-treatment mode, wherein hydrogen production rate of quantum dot visible light photocatalytic decomposition water is one time of that of pure synthesized quantum dots; after four times of circulation, the hydrogen production amount is not reduced at all, which shows that the quantum dot has good stability. In addition, the method is simple in process, low in cost, easy to obtain, convenient for batch production, non-toxic and harmless, and meets the environment-friendly requirement.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic hydrogen production, and relates to Ag-In-Zn-S quantum dots, in particular to a method and application for modifying Ag-In-Zn-S quantum dots with ferrocene derivatives. Background technique [0002] With the rapid development of human economic life, energy consumption is increasing year by year, exacerbating the depletion of fossil fuels. The use of fossil fuels has brought serious environmental problems, so it is imperative to replace fossil fuels with new energy sources. Hydrogen has the advantages of large combustion volume and non-polluting by-products, making it an ideal green energy. In the past few decades, photocatalytic hydrogen production has been considered as the most direct and efficient way to convert solar energy into hydrogen energy. [0003] Ag-In-Zn-S quantum dots have been widely valued because of their simple synthesis method and good light absorption band. However, A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/62B01J31/22B01J31/26C01B3/04
CPCC09K11/025C09K11/623B01J35/004B01J31/2295B01J31/26C01B3/042B01J2531/842Y02E60/36
Inventor 张国庆刘艳红李丰华姚宗辉邓邦亚薛奕钦曹金东李丽霞毛宝东
Owner JIANGSU UNIV
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