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Preparation and application of efficiently hydrogen producing double-halide perovskite photocatalyst

A photocatalyst, perovskite technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrogen production, etc., can solve the limitation of application, easy recombination of photogenerated electrons and holes, The problem of low light utilization rate, etc., can prolong the life of carriers, improve the photocatalytic performance and stability, and enhance the effect of carrier transport.

Active Publication Date: 2019-04-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CH 3 NH 3 PB 3 There are shortcomings such as easy recombination of photogenerated electrons and holes, and low light utilization efficiency, which limits its application in the energy field

Method used

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  • Preparation and application of efficiently hydrogen producing double-halide perovskite photocatalyst
  • Preparation and application of efficiently hydrogen producing double-halide perovskite photocatalyst
  • Preparation and application of efficiently hydrogen producing double-halide perovskite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] In this example, the double halide perovskite photocatalyst CH was prepared 3 NH 3 PB 3-x Br x The method is as follows:

[0023] 1) According to the general chemical formula CH 3 NH 3 PB 2.7 Br 0.3 The ratio, take the corresponding amount of 2mmol lead iodide (PbI 2 ), 1.8mmol methyl ammonium iodide (CH 3 NH 3 I) and 0.2mmol methyl ammonium bromide (CH 3 NH 3 Br) as a perovskite precursor material (adjusted CH 3 NH 3 I and CH 3 NH 3 The proportion of Br can obtain other bromine doping amounts of CH 3 NH 3 PB 3-x Br x precursor material);

[0024] 2) Dissolve the precursor material in 1mL of γ-butyrolactone (GBL), configure 2mol / L perovskite precursor solution, and the solution turns yellow;

[0025] 3) keeping the solution obtained in step 2) at 70° C. for 8 hours in a nitrogen atmosphere under magnetic stirring conditions;

[0026] 4) The solution described in step 3) was heated in a heating mantle at 110° C. for 12 hours until the solvent was com...

Embodiment 2

[0030] Prepare CH according to the method of Example 1 3 NH 3 PB 3-x Br x , x=0, 0.05, 0.10, 0.15, 0.20.

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Abstract

Preparation and application of an efficiently hydrogen producing double-halide perovskite photocatalyst belongs to the technical field of preparation of catalysts. The efficiently hydrogen producing double-halide perovskite photocatalyst is prepared through a simple process, and by controlling the added ratio of two halogens inside a precursor solution, the content of element and the energy gap ofperovskite crystals can be regulated. The preparation process of the efficiently hydrogen producing double-halide perovskite photocatalyst is simple and low in cost with a reaction temperature of 40-110 DEG C at room temperature; the prepared efficiently hydrogen producing double-halide perovskite photocatalyst can present excellent catalytic activity under the condition of visible light and without assisting of platinum promoter.

Description

technical field [0001] The invention relates to the preparation of hydrogen by catalytically decomposing hydroiodic acid under visible light, in particular to the preparation and application of a double halide perovskite photocatalyst. Background technique [0002] In a modern society where the global economy and technology are rapidly improving, environmental issues have long become one of the focuses of people's attention. The impact of energy and environmental pollution on people's lives has become more and more obvious in recent years. Water pollution, smog and haze air are threatening people's health. On the other hand, the shortage of oil and coal resources has to be affected by people. attention. Therefore, developing clean energy and vigorously promoting the use of clean fuels has become one of the important ways to solve energy and environmental problems. [0003] The solar-driven splitting of hydrohalic acids (HX) is one of the main directions for hydrogen produc...

Claims

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Application Information

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IPC IPC(8): B01J31/22C01B3/04
CPCC01B3/04B01J31/1805B01J2531/44B01J35/39Y02E60/36
Inventor 陶霞赵智杰郑言贞李楠邬娇娇李席涛
Owner BEIJING UNIV OF CHEM TECH
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