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0D/2D composite nano material as well as preparation method and application thereof

A technology of composite nanomaterials and nanosheets, which is applied in the field of 0D/2D composite nanomaterials and its preparation, can solve the problems of narrow spectral response range and affecting catalytic performance, and achieve low price, reduce composite rate and improve photocatalytic performance. Effect

Active Publication Date: 2020-12-22
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although compared to Bi alone 2 WO 6 , the performance of the composite material has been improved, but the optical absorption range of the composite material of CN105833860A is below 450nm, the optical absorption range of the composite material of CN105457663A is below 500nm, and the spectral response range is narrow, which will affect the improvement of catalytic performance

Method used

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  • 0D/2D composite nano material as well as preparation method and application thereof
  • 0D/2D composite nano material as well as preparation method and application thereof
  • 0D/2D composite nano material as well as preparation method and application thereof

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Embodiment Construction

[0045] The technical solutions of the present invention will be further described below in conjunction with specific examples.

[0046] The invention provides a kind of composite nano material, and its preparation method comprises the steps:

[0047] 1) Bi(NO 3 ) 3 ·5H 2 O was dispersed into ultrapure water to form a solution A with a concentration of 0.05mol / mL;

[0048] 2) Na 2 WO 4 2H 2 O is dispersed in ultrapure water to form solution B with a solution of 0.025mol / mL;

[0049] 3) Disperse KI into ultrapure water to form solution C with a concentration of 0.0025mol / mL;

[0050] 4) Add 20mL of solution A dropwise to an equal volume of solution B under stirring, stir rapidly for 30 minutes after the addition, then add an equal volume of solution C, stir for 1 hour after the addition, then centrifuge, and place the centrifuged solid at 60 After drying at ℃ for 5 h, ultrathin Bi 2 WO 6 Nanosheets.

[0051] 5) All Bi obtained in step 4) 2 WO 6 The nanosheets are di...

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Abstract

The invention discloses a 0D / 2D composite nano material as well as a preparation method and application thereof. The composite nano material comprises a Bi2WO6 nano sheet and Cs3Bi2I9 nano particles positioned in crystal lattices of the Bi2WO6 nano sheet. The Cs3Bi2I9 nanoparticles disclosed by the invention grow in Bi2WO6 nanosheet crystal lattices and can share Bi atoms with Bi2WO6. Sharing of Bi atoms provides a bridge effect for electron transport between two semiconductors Bi2WO6 and Cs3Bi2I9, and the recombination rate of photo-induced electrons and holes of the semiconductors can be reduced, so that the photocatalytic performance is improved.

Description

technical field [0001] The invention belongs to the technical field of perovskite materials, and in particular relates to an 0D / 2D composite nanomaterial and its preparation method and application. Background technique [0002] Semiconductor materials usually include transition metal oxides, sulfides, carbides and other substances, whose conductivity is between conductors and insulators, and can be used to make electronic materials for semiconductor devices and integrated circuits. Under normal circumstances, the conductivity of semiconductors increases with the increase of temperature, which is just the opposite of metal conductors. [0003] Metal halide perovskites are a newly emerging semiconductor material. In recent years, lead-based halide perovskites have attracted extensive attention due to their excellent optical properties (such as: long carrier lifetime, absorption can be extended to the visible region, bipolar charge transport, easy energy level tailoring, etc.)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J23/31C01B32/40B01D53/86B01D53/62
CPCB01J27/08B01J23/31B01J23/002C01B32/40B01D53/86B01D53/007B01D2257/504B01D2255/802B01J35/23B01J35/39Y02A50/20
Inventor 张敏刘兆磊
Owner TIANJIN UNIVERSITY OF TECHNOLOGY