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Bismuth oxybromide and nano zinc stannate heterojunction and preparation method thereof

A nano-zinc stannate, bismuth oxybromide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem that the catalytic activity of visible light and the low recombination probability of photogenerated electrons and holes have not yet been seen. , high electron mobility and quantum efficiency, to achieve excellent photocatalytic performance, good light absorption performance, small band gap value

Inactive Publication Date: 2017-03-15
LUOYANG INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Zinc stannate (Zn 2 SnO 4 ) As a new type of photoelectric material, its electron mobility and quantum efficiency are high, and the probability of recombination of photogenerated electrons and holes is low. In particular, it should be pointed out that nanostructured zinc stannate has excellent photocatalytic properties. It can effectively degrade NO, HCHO and organic pollutants, but its forbidden band width is about 3.6eV. Currently, Zn 2 SnO 4 Most of the photocatalytic researches are limited to the ultraviolet region, and no reports on its visible light catalytic activity have been seen.

Method used

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  • Bismuth oxybromide and nano zinc stannate heterojunction and preparation method thereof
  • Bismuth oxybromide and nano zinc stannate heterojunction and preparation method thereof
  • Bismuth oxybromide and nano zinc stannate heterojunction and preparation method thereof

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Embodiment 1

[0028] A preparation method of bismuth oxybromide and nano-zinc stannate heterojunction, the heterojunction has a chemical formula and structure of Zn 2 SnO 4 / BiOBr nano powder, the particle size is 20-30nm. The preparation method comprises the following steps:

[0029] Step 1. Weigh a certain amount of sodium hydroxide powder, dissolve it completely in the solvent, stir and dissolve it fully to obtain a sodium hydroxide solution with a concentration of 6mol / L, which is marked as solution A and set aside; the solvent in it It is a mixture of deionized water and absolute ethanol with a volume ratio of 4:1;

[0030] Step two, weigh a certain amount of SnCl 4 ·5H 2 O and Zn(OAc) 2 2H 2 O is dissolved in the solvent to form a mixed solution, and the Sn in the mixed solution prepared after fully stirring and dissolving 4+ with Zn 2+ Concentrations are 0.4mol / L and 0.8mol / L respectively, marked as solution B, for later use; the solvent is a mixture of deionized water and ab...

Embodiment 2

[0039] A preparation method of bismuth oxybromide and nano-zinc stannate heterojunction, the heterojunction has a chemical formula and structure of Zn 2 SnO 4 / BiOBr nano powder, the particle size is 20-30nm. The preparation method comprises the following steps:

[0040] Step 1. Weigh a certain amount of sodium hydroxide powder, dissolve it completely in the solvent, stir and dissolve it fully to obtain a sodium hydroxide solution with a concentration of 6mol / L, which is marked as solution A and set aside; the solvent in it It is a mixture of deionized water and absolute ethanol with a volume ratio of 5:1;

[0041] Step two, weigh a certain amount of SnCl 4 ·5H 2 O and Zn(OAc) 2 2H 2 O is dissolved in the solvent to form a mixed solution, and the Sn in the mixed solution prepared after fully stirring and dissolving 4+ with Zn 2+ Concentrations are 0.4mol / L and 0.8mol / L respectively, marked as solution B, for later use; the solvent is a mixture of deionized water and ab...

Embodiment 3

[0048] A preparation method of bismuth oxybromide and nano-zinc stannate heterojunction, the heterojunction has a chemical formula and structure of Zn 2 SnO 4 / BiOBr nano powder, the particle size is 20-30nm. The preparation method comprises the following steps:

[0049] Step 1. Weigh a certain amount of sodium hydroxide powder, dissolve it completely in the solvent, stir and dissolve it fully to obtain a sodium hydroxide solution with a concentration of 6mol / L, which is marked as solution A and set aside; the solvent in it It is a mixture of deionized water and absolute ethanol with a volume ratio of 6:1;

[0050] Step two, weigh a certain amount of SnCl 4 ·5H 2 O and Zn(OAc) 2 2H 2 O is dissolved in the solvent to form a mixed solution, and the Sn in the mixed solution prepared after fully stirring and dissolving 4+ with Zn 2+ Concentrations are 0.4mol / L and 0.8mol / L respectively, marked as solution B, for later use; the solvent is a mixture of deionized water and ab...

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Abstract

The invention discloses a bismuth oxybromide and nano zinc stannate heterojunction and a preparation method thereof. The heterojunction is nano powder of which the chemical formula structure is Zn2SnO4 / BiOBr, and the particle size of the heterojunction is 20-30nm. The preparation method comprises the following steps: preparing a solution A, preparing a solution B, preparing a solvent heat product, preparing Zn2SnO4 nano powder, preparing a suspension C, and preparing the Zn2SnO4 / BiOBr nano powder. The nano Zn2SnO4 / BiOBr heterojunction is synchronized by using a two-step method, the operation is convenient to implement, and a product prepared through synchronization reaction is high in purity, and is excellent in photocatalytic performance under a visible light condition.

Description

technical field [0001] The invention relates to a heterojunction of bismuth oxybromide and nanometer zinc stannate and a preparation method thereof. Background technique [0002] Heterojunction structures are generally composed of two or more different materials, which often produce many new physical properties that a single material does not have. It needs to be pointed out that heterojunctions with specific nanostructures can benefit from the small Physical and chemical properties such as size effect, surface effect, quantum confinement effect, macroscopic quantum tunnel effect and dielectric confinement effect play a greater role. Nano-heterostructures have attracted great attention in luminescence, solar cells, photocatalysis, and gas sensing. In the previous research results, nano-heterojunction photocatalysts showed excellent photocatalytic performance, which can be attributed to the fast separation rate of photogenerated charge carriers, long lifetime of photogenerat...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F101/30
CPCC02F1/30B01J27/06C02F2101/308B01J35/39
Inventor 贾铁昆李继利刘明闵志宇余东升赵军伟付芳孙中亮刘文彬
Owner LUOYANG INST OF SCI & TECH
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