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Metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst and preparation method thereof, and application of metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst in reduction of carbon dioxide

A photocatalyst and quantum dot technology, applied in the directions of carbon monoxide, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unsatisfactory photocatalytic reduction selectivity, weak carbon dioxide adsorption capacity, humidity sensitivity, etc., to improve the activity and the effects of selectivity, reduced sensitivity, and mild reaction conditions

Active Publication Date: 2021-08-03
YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the application of photocatalytic carbon dioxide reduction, CsPbBr 3 There are problems such as sensitivity to humidity, weak adsorption capacity for carbon dioxide, and unsatisfactory photocatalytic reduction selectivity. The application in this field is still very limited.

Method used

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  • Metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst and preparation method thereof, and application of metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst in reduction of carbon dioxide
  • Metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst and preparation method thereof, and application of metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst in reduction of carbon dioxide
  • Metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst and preparation method thereof, and application of metal indium-doped cesium lead bromide perovskite quantum dot photocatalyst in reduction of carbon dioxide

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preparation example Construction

[0038] Refer to attached figure 1 A kind of preparation method of perovskite quantum dot photocatalyst disclosed by the invention comprises the following steps:

[0039] S1. Preparation of a precursor solution containing metal indium and lead bromide. The solvent is octadecene, oleic acid, and oleylamine, and the temperature is kept at 150° C. for 1 hour.

[0040] S2. Prepare cesium carbonate precursor solution. The solvent is octadecene and oleic acid, and the temperature is kept at 120° C. for 1 hour.

[0041] S3. Rapidly inject S2 into S1, react for 5 seconds, and cool in an ice bath to terminate the reaction.

[0042] S4. Exchange catalyst surface ligands by repeated washing with toluene and acetone.

[0043] S5. It can be obtained by drying at 80°C for 12 hours under continuous vacuuming.

[0044] Metal indium doped CsPbBr prepared by this experimental example 3 Characterization of perovskite quantum dot photocatalysts shows that metal indium doped CsPbBr 3 Perovsk...

Embodiment 1

[0057] A pure phase of CsPbBr 3 The preparation method of perovskite quantum dot photocatalyst comprises the following steps:

[0058] S1: Dissolve 207mg lead bromide in 15ml octadecene, heat to 120°C under the protection of argon, keep the temperature constant for 1 hour, add 1.5ml oleylamine and 1.5ml oleic acid, heat up to 150°C until The solid dissolves completely, producing a lead bromide precursor.

[0059] S2: Dissolve 27mg of cesium carbonate in 1ml of octadecene, add 0.2ml of oleic acid, heat to 120°C under the protection of argon, and keep the temperature constant for 1 hour to completely dissolve the cesium carbonate to generate a cesium carbonate precursor.

[0060] S3: Rapidly inject the cesium carbonate precursor solution into it, react for 5 seconds, and quickly cool down to room temperature through an ice bath to terminate the reaction.

[0061] S4: Centrifuge at 10,000 rpm for 5 minutes in a centrifuge to obtain the lower solid. Add 10ml of toluene to the s...

Embodiment 2

[0065] A metal indium doped CsPbBr 3 The preparation method of perovskite quantum dot photocatalyst comprises the following steps:

[0066] S1: Dissolve 207mg lead bromide and 0.6mg indium bromide in 15ml octadecene, heat to 120°C under the protection of argon, keep the temperature constant for 1 hour, add 1.5ml oleylamine and 1.5ml oleic acid, Raise the temperature to 150°C until the solid is completely dissolved to generate a precursor solution containing metal indium and lead bromide.

[0067] S2: Dissolve 27mg of cesium carbonate in 1ml of octadecene, add 0.2ml of oleic acid, heat to 120°C under the protection of argon, and keep the temperature constant for 1 hour to completely dissolve the cesium carbonate to generate a cesium carbonate precursor.

[0068] S3: Rapidly inject the cesium carbonate precursor solution into it, react for 5 seconds, and quickly cool down to room temperature through an ice bath to terminate the reaction.

[0069] S4: Centrifuge at 10,000 rpm f...

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Abstract

The invention discloses a metal indium-doped CsPbBr3 perovskite quantum dot photocatalyst. The photocatalyst is characterized in that halogen perovskite quantum dots are used as a carrier, and metal indium is doped in the halogen perovskite quantum dots to serve as an active center. A preparation method of the photocatalyst comprises the following steps: S1, preparing a precursor solution containing metal indium and lead bromide; S2, preparing a cesium carbonate precursor solution; S3, rapidly injecting the cesium carbonate precursor solution into the precursor solution containing the metal indium and the lead bromide for a reaction, conducting cooling in an ice bath, and then terminating the reaction; S4, exchanging a ligand on the surface of a catalyst through repeated washing of methylbenzene and acetone; and S5, conducting drying in a continuous vacuumizing state to obtain the photocatalyst. The photocatalytic carbon dioxide reduction performance of the metal indium-doped CsPbBr3 perovskite quantum dot photocatalyst disclosed by the invention is 1.48 to 3.25 times the photocatalytic carbon dioxide reduction performance of a pure-phase CsPbBr3 perovskite quantum dot photocatalyst, and the stability of the CsPbBr3 perovskite quantum dot photocatalyst is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, in particular to a metal indium-doped cesium lead bromide (CsPbBr 3 ) perovskite quantum dot photocatalyst, preparation method and its application in reducing carbon dioxide. Background technique [0002] By using sustainable clean solar energy to purify environmental pollution and convert solar energy into chemical energy, the increasingly severe environmental pollution and energy shortage problems facing today's society can be solved. Photocatalysts can directly utilize sunlight or human illumination, and have attracted widespread attention for their great application potential in the fields of environmental protection, material science, and solar energy conversion. Driven by sunlight, using photocatalytic materials under mild reaction conditions to catalyze the conversion of carbon dioxide into renewable energy and realize carbon recycling has always been a major topic for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/125C01B32/40C01G21/00C09K11/66B82Y20/00B82Y30/00
CPCB01J27/125C01B32/40C01G21/006C09K11/665B82Y20/00B82Y30/00C01P2002/72C01P2002/85C01P2002/01C01P2002/84B01J35/39
Inventor 盛剑平钟丰忆董帆孙艳娟李解元
Owner YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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