Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst

A technology of carbon quantum dots and quantum dots, which is applied in the preparation of composite photocatalysts and functional carbon quantum dots modified CIZS quantum dot composite photocatalysts, can solve the problems that the role of CDs has not been clearly proved, and achieve high-efficiency photocatalytic hydrogen production , Facilitate mass production, high efficiency effect

Active Publication Date: 2022-02-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on CDs as hole acceptors, and the role of CDs as efficient hole transfer agents has not been clearly demonstrated.

Method used

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  • Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst
  • Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst
  • Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of CDs-NiPc precursor:

[0031] Pipette 100mg of CDs and 4.48mg of nickel phthalocyanine solution into a transparent glass bottle and dilute to 20mL solution. The above solution was hydrothermally reacted in an autoclave at 140°C for 4 hours, and then used in the next step after cooling.

[0032] (2) Preparation of CIZS-CDs-NiPc composite photocatalyst:

[0033] Weigh 19.80mg of CIZS quantum dots and dissolve them in 14.00mL of water, add 0.20mg of CDs-NiPc precursor, stir ultrasonically, and conduct a hydrothermal reaction in an autoclave at 110°C for 4 hours, wash after the reaction to obtain a CIZS-CDs-NiPc composite catalyst of light.

[0034] Take 0.02g of CIZS-CDs-NiPc composite photocatalyst and 0.528g of L-ascorbic acid and add them to the photoreactor. 2 After the gas in the bottle is exhausted. Turn on the customized xenon lamp irradiation under the condition of magnetic stirring, and take samples and analyze every 1h.

[0035] The hydrogen...

Embodiment 2

[0037] (1) Preparation of CDs-NiPc precursor:

[0038] Pipette 104mg of CDs and 4.40mg of nickel phthalocyanine solution into a transparent glass bottle and dilute to 20mL solution. The above solution was hydrothermally reacted in an autoclave at 140°C for 4 hours, and then used in the next step after cooling.

[0039] (2) Preparation of CIZS-CDs-NiPc composite photocatalyst:

[0040]Weigh 19.80mg of CIZS quantum dots and dissolve them in 14.00mL of water, add 0.20mg of CDs-NiPc precursor, stir ultrasonically, and conduct a hydrothermal reaction in an autoclave at 110°C for 4 hours, wash after the reaction to obtain a CIZS-CDs-NiPc composite catalyst of light.

[0041] Take 0.02g of CIZS-CDs-NiPc composite photocatalyst and 0.528g of L-ascorbic acid and add them to the photoreactor. 2 After the gas in the bottle is exhausted. Turn on the customized xenon lamp irradiation under the condition of magnetic stirring, and take samples and analyze every 1h.

[0042] The rate of h...

Embodiment 3

[0044] (1) Preparation of CDs-NiPc precursor:

[0045] Pipette 106mg of CDs and 8.84mg of nickel phthalocyanine solution into a transparent glass bottle and dilute to 20mL solution. The above solution was hydrothermally reacted in an autoclave at 140°C for 4 hours, and then used in the next step after cooling.

[0046] (2) Preparation of CIZS-CDs-NiPc composite photocatalyst:

[0047] Weigh 19.64mg of CIZS quantum dots and dissolve them in 14.10mL of water, add 0.40mg of CDs-NiPc precursor, stir ultrasonically, and react hydrothermally in an autoclave at 110°C for 4 hours, wash after the reaction, and obtain CIZS-CDs-NiPc composite catalyst of light.

[0048] Take 0.02g of CIZS-CDs-NiPc composite photocatalyst and 0.528g of L-ascorbic acid and add them to the photoreactor. 2 After the gas in the bottle is exhausted. Turn on the customized xenon lamp irradiation under the condition of magnetic stirring, and take samples and analyze every 1h.

[0049] The hydrogen production...

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Abstract

The invention belongs to the technical field of composite materials, and relates to a preparation method of a phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot (CIZS-CDs-NiPc) composite photocatalyst, wherein the preparation method comprises the steps: dispersing carbon quantum dots (CDs) and nickel phthalocyanine (NiPc) in dimethyl sulfoxide, uniformly mixing, and carrying out solvothermal reaction for 2-4 hours at the temperature of 110-140 DEG C to prepare a CDs-NiPc precursor; and dispersing CIZS quantum dots in water, adding the CDs-NiPc precursor, ultrasonically stirring uniformly, carrying out hydrothermal reaction for 3-4 hours at the temperature of 100-110 DEG C, cooling to room temperature, washing with ethanol cleanly, and drying to obtain the CIZS-CDs-NiPc composite photocatalyst. The invention also discloses an application of the prepared catalyst in photocatalytic hydrogen production. 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. Under the excitation of visible light, photo-generated holes are rapidly transferred to NiPc through the carbon quantum dots to greatly reduce the occurrence of recombination, so that more electrons are used for hydrogen production reaction, and the photocatalytic performance is improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a composite photocatalyst, in particular to a preparation method and application of a phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot (CIZS-CDs-NiPc) composite photocatalyst. Background technique [0002] Photocatalytic water splitting is considered to be one of the most ideal methods to directly utilize continuous solar energy and water to produce hydrogen. Visible light, which accounts for about 43 percent of sunlight and plays a key role in making better use of solar energy, remains far below expectations. Quantum dots (Quantum dots, QDs) are considered to be the most promising candidate particles for visible light active photocatalysts due to their unique quantum confinement effect, ideal optical properties and large specific surface area. Compared with traditional II-VI quantum dots, cadmium-free I-III-VI quantum dots have attracted ...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J27/04B01J31/22B01J31/28B01J35/00C01B3/04
CPCB01J31/183B01J31/28B01J21/18B01J27/04C01B3/042B01J2531/847B01J2531/025B01J35/39Y02E60/36
Inventor 毛宝东陈启涛国钦凯刘艳红李倩姜天尧张东旭周春星邓邦亚
Owner JIANGSU UNIV
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