Preparation method and application of perovskite-metal complex composite material

A technology of metal complexes and perovskite materials, applied in the direction of organic compound/hydride/coordination complex catalysts, non-metallic elements, chemical instruments and methods, etc., can solve the problems of poor catalytic activity and low separation efficiency of photogenerated charges problems, to achieve the effect of simple synthesis process and good material reproducibility

Active Publication Date: 2019-11-15
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Since existing halogen perovskite materials have problems such as low photogenerated charge separation efficiency and poor catalytic activity, the purpose of the present invention is to provide a halogen perovskite ABX 3 A method for prepar

Method used

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  • Preparation method and application of perovskite-metal complex composite material
  • Preparation method and application of perovskite-metal complex composite material
  • Preparation method and application of perovskite-metal complex composite material

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Embodiment 1

[0050] A preparation method of perovskite-metal complex composite material, comprising the following steps:

[0051] Step 1, 0.440g Cs 2 CO 3 Dissolve in 3mL propionic acid to obtain the precursor solution of cesium; 0.550g PbBr 2 Add to the mixed solution of 1mL isopropanol, 1mL propionic acid and 1mL butylamine to obtain the precursor solution of lead. Dilute 10 μL of the precursor solution of cesium propionate into a mixed solution of 1 mL of n-hexane and 0.5 mL of isopropanol, and quickly add 50 μL of PbBr under stirring 2 Precursor solution of bright yellow CsPbBr 3 Nanocrystal formation. Centrifuge at 8000rpm for 2min to separate the product, then wash with toluene;

[0052] Step 2, 0.2 g of Re(CO) 5 Br and 0.1 g of 4,4-dicarboxylic acid bipyridine (dcbpy) were dissolved in 15 mL of toluene solution, N 2 Reflux reaction at 115°C for 15 hours under atmosphere; the reaction was cooled to room temperature and centrifuged, then washed with dichloromethane and methanol...

Embodiment 2

[0056] A kind of perovskite-metal complex composite material CsPbBr 1.5 I 1.5 -Re(CO) 3 The preparation method of Br(dpbpy), comprises the following steps:

[0057] Step 1, 0.440g Cs 2 CO 3 Be dissolved in 3mL propionic acid to obtain the precursor solution of cesium; 0.2750g PbBr 2 and 0.3458 g PbI 2 Add to the mixed solution of 1mL isopropanol, 1mL propionic acid and 1mL butylamine to obtain the precursor solution of lead. Dilute 10 μL of the precursor solution of cesium propionate into a mixed solution of 1 mL of n-hexane and 0.5 mL of isopropanol, and quickly add 50 μL of PbI under stirring 2 precursor solution, with red CsPbBr 1.5 I 1.5 Nanocrystal formation. Centrifuge at 8000rpm for 2min to separate the product, then wash with ethyl acetate;

[0058] Step 2, 0.2 g of Re(CO) 5 Br and 0.1 g of 2,2'-bipyridine-4,4'-bisphosphoric acid were dissolved in 15 mL of toluene solution, N 2 Under atmosphere, 115°C was refluxed for 15h. After the reaction was cooled to ...

Embodiment 3

[0062] A perovskite-metal complex composite material MAPbI 3 -Re(CO) 3 The preparation method of Br(dcbpy), comprises the following steps:

[0063] 0.5gMAI, 1.5gPbI 2 Dissolve in 3 mL DMF, and add 300 μL oleic acid, 60 μL oleylamine to it, and add 3 mg of Re(CO) to the solution 3 The Br(dcbpy) complex powder was stirred at room temperature for 10 h; the solution formed above was S1, and S1 was added to chloroform according to the volume ratio of S1:poor solvent of 1:60, and the reaction solution was centrifuged to obtain the product.

[0064] attached image 3 For the MAPbI obtained in this embodiment 3 -Re(CO) 3 XRD pattern of Br(dcbpy) composite material, it can be seen that the composite material did not destroy MAPbI 3 Structure.

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Abstract

The invention discloses a preparation method and application of a composite material constructed from a halogen perovskite material ABX3 and a metal complex M complex. The composite material is synthesized by two methods comprising the following steps: 1) adding a pre-synthesized halogen perovskite material ABX3 into a solution of a metal complex functionalized by groups such as carboxyl, amino orphosphate, and forming the composite material under a certain condition by utilizing coordination between the functional groups of the metal complex and the halogen perovskite material; and 2) addingthe functionalized metal complex into the preparation process of the halogen perovskite material, and performing in-situ adsorption on the complex on the surface of the halogen perovskite so as to form the composite material. The synthetic method disclosed by the invention is convenient, excellent in reproducibility and operable at a normal temperature; and meanwhile, the prepared composite material can be applied to photocatalytic CO2 reduction and can be further applied to the fields such as hydrogen production by photocatalysis, organic matter degradation and photocatalysis/photoelectrocatalysis.

Description

technical field [0001] The invention belongs to the field of preparation and application of novel composite materials, in particular to a structure of ABX 3 The preparation method and application of the composite material constructed by the halogen perovskite material and the metal complex. Background technique [0002] Due to the advantages of large extinction coefficient, wide light absorption range, long carrier diffusion length, adjustable band gap, and easy synthesis, halogen perovskite materials have developed rapidly in recent years. Catalysis and other fields have shown broad development prospects. In particular, the good visible light absorption capacity and suitable energy band position of halogen perovskite materials show good development potential in photocatalysis. It has been reported to be applied to photocatalytic hydrogen production, CO 2 Reduction, degradation of organic dyes, etc. However, as a photocatalyst, halogen perovskite still has the problems of...

Claims

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Application Information

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IPC IPC(8): B01J31/26C01B3/04C01B32/40
CPCB01J31/26B01J35/004B01J35/0033C01B3/042C01B32/40C01B2203/0277Y02E10/549
Inventor 陈洪燕张泓泓孔自成董玉杰江勇
Owner SUN YAT SEN UNIV
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