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Organic-inorganic hybrid perovskite nano material and preparation method thereof

A nano-material and perovskite technology, applied in organic chemistry, potassium organic compounds, chemical instruments and methods, etc., can solve the problems of high production cost, inability to prepare in large quantities, complicated process, etc., and achieve low cost and product stability High, simple process effect

Inactive Publication Date: 2018-10-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides an organic-inorganic hybrid perovskite nanomaterial and its preparation method, thereby solving the existing problems of the prior art which are complex in process, high in production cost, and unable to be prepared in large quantities. technical problem

Method used

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  • Organic-inorganic hybrid perovskite nano material and preparation method thereof
  • Organic-inorganic hybrid perovskite nano material and preparation method thereof
  • Organic-inorganic hybrid perovskite nano material and preparation method thereof

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preparation example Construction

[0037] Such as figure 1 Shown, a kind of preparation method of organic-inorganic hybrid perovskite nanomaterials, comprising:

[0038] (1) Disperse piperazine and BX in water, the molar ratio of piperazine and BX is 1:1, to obtain a mixed solution, add HX to the mixed solution, to obtain an acidic mixed solution, the pH value of the acidic mixed solution is 1-2 ;

[0039] (2) Place the acidic mixture for 3 to 7 days, and a colorless massive crystal appears, which is a massive organic-inorganic hybrid perovskite C 4 h 12 N 2 BX 3 ·H 2O;

[0040] (3) The bulk organic-inorganic hybrid perovskite C 4 h 12 N 2 BX 3 ·H 2 O was heated at 100°C-120°C for 1h-3h to obtain nanoscale hybrid perovskite C 4 h 12 N 2 BX 3 ; Nanoscale hybrid perovskite C 4 h 12 N 2 BX 3 The particle size is 300nm-900nm, and the grain size is 5nm-16nm.

[0041] Wherein, B is K or Rb, and X is Br, Cl or I.

Embodiment 1

[0043] A preparation method of an organic-inorganic hybrid perovskite nanomaterial, the specific preparation method comprising the following steps:

[0044] (1) Weigh 0.23g of KBr and 0.1723g of C with a balance 4 h 10 N 2 (piperazine), then add in the beaker that fills 100ml distilled water, stir with glass rod, be mixed with the colorless mixed solution standby.

[0045] (2) Measure 1ml of hydrobromic acid in the mixed solution described in step (1) with a pipette gun to obtain a pH value of 1 for the acidic mixed solution.

[0046] (3) Filter the acid mixture described in step (2) into a small beaker with filter paper, and put it into a fume hood. After 3 days, colorless blocky crystals appeared in the small beaker, which was a product with ABX 3 Structure of organic-inorganic hybrid perovskite C 4 h 12 N 2 KBr 3 ·H 2 O.

[0047] (4) Wash and filter the colorless massive crystals described in step (3) with acetone and dry in air.

[0048] (5) Put the cleaned crys...

Embodiment 2

[0057] A method for preparing an organic-inorganic hybrid perovskite nanomaterial, the specific preparation method comprising the following steps:

[0058] (1) Use a balance to weigh 0.3307g of RbBr, 0.1723g of C 4 h 10 N 2 (piperazine), then add in the beaker that fills 100ml distilled water, stir with glass rod, be mixed with the colorless mixed solution standby.

[0059] (2) Measure 1ml of hydrobromic acid in the mixed solution described in step (1) with a pipette gun to obtain a pH value of 2 for the acidic mixed solution.

[0060] (3) Filter the colorless solution described in step (2) into a small beaker with filter paper, and put it into a fume hood. After 5 days, a colorless blocky crystal appeared in the small beaker, which was an organic-inorganic hybrid perovskite C with ABX3 structure 4 h 12 N 2 RbBr 3 ·H 2 O.

[0061] (4) Wash and filter the colorless massive crystals described in step (3) with acetone and dry in air.

[0062] (5) Put the cleaned crystal...

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Abstract

The invention discloses an organic-inorganic hybrid perovskite nano material and a preparation method thereof, and the preparation method is as folows: dispersing piperazine and BX in water to obtaina mixed liquid, and adding HX to the mixed liquid to obtain an acidic mixed liquid; placing the acidic mixed liquid for 3 days-7 days to form a colorless block crystal, namely blocky organic-inorganichybrid perovskite C4H12N2BX3.H2O; and heating the blocky organic-inorganic hybrid perovskite C4H12N2BX3.H2O at 100 DEG C to 120 DEG C for 1h-3h to obtain nanoscale hybrid perovskite C4H12N2BX3; wherein B is K or Rb, and X is Br, Cl or I. The preparation method is a method for preparing the organic-inorganic hybrid perovskite nanomaterials in large quantities and at low cost, and the hybrid perovskite nanomaterial prepared by the method has the advantages of simple process, low cost and mild reaction condition, and reactions are safer due to no high temperature and high pressure.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and more specifically relates to an organic-inorganic hybrid perovskite nanomaterial and a preparation method thereof. Background technique [0002] The term "perovskite" now refers to a large class of 3 Materials with the same structure, namely the perovskite structure. The general chemical formula of perovskite materials is ABX 3 Form, A and B are cations of different sizes, and X is an anion coordinated with B. Usually, the radius of the cation at the A site is larger than that at the B site, and the B site and the X site anion are six-coordinated to form a BX 6 the octahedron. These octahedra form a three-dimensional framework through vertex sharing, and the A-site cation is located in the center of the framework. [0003] Hybrid organic-inorganic perovskites (HOIPs) are ABX 3 A subclass of materials in which the ions at the A-site and B-site are replaced by organic amine cations ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/06C07F1/00B82Y40/00
CPCB82Y40/00C07F1/005
Inventor 李伟张亚楠陆培祥
Owner HUAZHONG UNIV OF SCI & TECH
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