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Halide perovskite-based platinum monatomic photocatalytic material as well as preparation method and application thereof

A technology of halide perovskite and photocatalytic materials, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., which can solve the problem of high preparation cost and cumbersome preparation process, etc. problem, to achieve the effect of low cost, good stability and excellent stability

Active Publication Date: 2022-04-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most single-atom catalysts supported by carriers require high-temperature sintering or high-end and expensive special process equipment, or require complex carrier preparation processes to create conditions suitable for single-atom loading. The preparation process is cumbersome and the preparation cost is high.

Method used

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  • Halide perovskite-based platinum monatomic photocatalytic material as well as preparation method and application thereof
  • Halide perovskite-based platinum monatomic photocatalytic material as well as preparation method and application thereof
  • Halide perovskite-based platinum monatomic photocatalytic material as well as preparation method and application thereof

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preparation example Construction

[0027] First, a method for preparing a halide perovskite-based platinum single-atom photocatalytic material, comprising the following steps:

[0028] Mixed halogen perovskite FAPbBr was prepared by co-precipitation or ion exchange method 3-x I x powder and saturated solution thereof, wherein x is 0-3;

[0029] Mix the halogen perovskite FAPbBr 3-x I x The powder is dispersed in its saturated solution, and a platinum source is added to it, and after continuous stirring for a set time, the mixture is reacted under light, and the photoretrial reduction load of Pt is carried out to obtain a perovskite-based platinum single-atom catalytic material Pt / FAPbBr 3-x I x 。

[0030] In FAPbBr containing perovskite solutes 3-x I x Platinum sources (such as haloplatinic acid, haloplatinate, platinumate) are added to the saturated solution to anchor the Pt atom to the perovskite surface by adsorption and halogen coordination. The system is then illuminated, and a perovskite-supported atomic-leve...

Embodiment 1

[0055] Example 1: Preparation of FAPbBr by co-precipitation 3-x I x Mixed halogen perovskite photocatalytic material

[0056] The specific steps are as follows:

[0057]Take 40 mL hydroiodic acid and 10 mL hypophosphite in a 100 mL beaker with a measuring cylinder and heat it up to 90 °C; add 11.01 g of lead bromide and stir continuously, until it is completely dissolved, slowly add 4.296 g of methodine iodide and 0.625 g of formamidine bromide; stir for 30 minutes and then naturally cool to room temperature; filtration / centrifugal separation, the solution is a perovskite saturated solution, retained; the black powder is perovskite, 60 °C oven / vacuum drying to obtain the final FAPbBr 3-x I x Perovskite samples.

Embodiment 2

[0059] Take 40mL hydroiodic acid and 10mL hypophosphite in a 100mL beaker with a measuring cylinder and heat it up to 90 °C; add 9.175g of lead bromide and 2.305g of lead iodide and stir continuously, until it is completely dissolved, slowly add 5.157g of metamidine iodide; stir for 30 minutes and then naturally cool to room temperature; filter / centrifuge separation, the solution is the perovskite saturation solution, retained; the black powder is perovskite, 60 °C oven / vacuum drying to obtain the final FAPbBr 3-x I x Perovskite samples.

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Abstract

The invention discloses a halide perovskite-based platinum monatomic photocatalytic material and a preparation method and application thereof, and the preparation method comprises the following steps: preparing mixed halogen perovskite FAPbBr3-xIx powder and a saturated solution thereof by adopting a coprecipitation method or an ion exchange method, x being 0-3; the preparation method comprises the following steps: dispersing mixed halogen perovskite FAPbBr3-xIx powder into a saturated solution of the mixed halogen perovskite FAPbBr3-xIx powder, adding a platinum source into the mixed halogen perovskite FAPbBr3-xIx powder, continuously stirring for a set time, reacting the mixed solution under illumination, and carrying out photo-reduction loading of Pt to prepare the perovskite-based platinum monatomic catalytic material Pt / FAPbBr3-xIx.

Description

Technical field [0001] The present invention relates to the field of photocatalytic hydrogen production technology, specifically relates to a halide perovskite-based platinum (Pt) single-atom photocatalytic material and preparation method and application thereof. Background [0002] The statements herein provide only the background techniques associated with the present invention and do not necessarily constitute the prior art. [0003] Photocatalytic hydrogen production is a photocatalyst that decomposes water into hydrogen and oxygen by absorbing solar energy, thereby converting solar energy into chemical energy that can be stored - hydrogen. At present, people's research on the modification of halide perovskite to hydrogen photocatalysts mainly focuses on the construction of heterojunctions and the loading of cocatalysts, while the supported materials are concentrated in common traditional semiconductor photocatalysts and conventional cocatalysts, such as graphene, molybdenum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J37/03B01J37/30C01B3/04
CPCB01J31/0245B01J37/03B01J37/30C01B3/042B01J35/39Y02E60/36
Inventor 王朋吴亚强黄柏标王泽岩郑昭科刘媛媛程合锋张倩倩张晓阳
Owner SHANDONG UNIV
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