Method for synthesizing nanometer zinc-doped tin oxide/zinc stannate heterojunction

A synthesis method and heterojunction technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as no related reports, achieve simple process, The effect of large surface area and high product purity

Inactive Publication Date: 2012-07-04
LUOYANG INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Choose Zn-SnO with different bandwidth 2 with Zn 2 SnO 4 system, as Zn 2 SnO 4 Main phase, Zn-SnO 2 As the second phase, nano-Zn-SnO was synthesized by solvent method 2 / Zn 2 SnO 4 heterojunction, the synthesized product is expected to obtain excellent photocatalytic properties, however Zn-SnO 2 / Zn 2 SnO 4 The heterogeneous combination synthesis method has not been reported yet

Method used

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  • Method for synthesizing nanometer zinc-doped tin oxide/zinc stannate heterojunction
  • Method for synthesizing nanometer zinc-doped tin oxide/zinc stannate heterojunction
  • Method for synthesizing nanometer zinc-doped tin oxide/zinc stannate heterojunction

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Embodiment 1

[0033] A method for synthesizing a nanometer zinc-doped tin oxide / zinc stannate heterojunction, comprising the steps of:

[0034] (1) NaOH solution with a volume concentration of 2.5mol / L, the solvent is a mixture of deionized water and absolute ethanol, and the volume ratio is 1:1;

[0035] (2) Configure SnCl 4 ·5H 2 O and Zn(NO 3 ) 2 ·6H 2 The mixed solution of O, the solvent is a mixture of deionized water and absolute ethanol, the volume ratio is 1:1, wherein SnCl 4 The concentration of the substance is 0.45mol / L; Zn(NO 3 ) 2 The concentration of the substance is 0.05mol / L;

[0036] (3) Add the NaOH solution obtained in step (1) dropwise to the SnCl in step (2) 4 and Zn(NO 3 ) 2 In the mixed solution of SnCl 4 and Zn(NO 3 ) 2 The volume ratio of the mixed solution and the NaOH aqueous solution is 1:2, the dropping rate is 2~3ml / min, and the precursor is obtained by stirring evenly; the above precursor is moved into a hydrothermal reactor, and is kept at 180°C ...

Embodiment 2

[0045] A kind of synthetic method of nanometer zinc-doped tin oxide / zinc stannate heterojunction, it comprises the steps:

[0046] (1) NaOH solution with a volume concentration of 2.5mol / L, the solvent is a mixture of deionized water and absolute ethanol, and the volume ratio is 1:1;

[0047] (2) Configure SnCl 4 ·5H 2 O and Zn(NO 3 ) 2 ·6H 2 The mixed solution of O, the solvent is a mixture of deionized water and absolute ethanol, the volume ratio is 1:1, wherein SnCl 4 The concentration of the substance is 0.4475 mol / L; Zn(NO 3 ) 2 The concentration of the substance is 0.0525 mol / L;

[0048] (3) Add the NaOH solution obtained in step (1) dropwise to the SnCl in step (2) 4 and Zn(NO 3 ) 2 In the mixed solution of SnCl 4 and Zn(NO 3 ) 2 The volume ratio of the mixed solution and the NaOH aqueous solution is 1:2, the dropping rate is 2~3ml / min, and the precursor is obtained by stirring evenly; the above precursor is moved into a hydrothermal reactor, and is kept at...

Embodiment 3

[0056] A kind of synthetic method of nanometer zinc-doped tin oxide / zinc stannate heterojunction, it comprises the steps:

[0057] (1) NaOH solution with a volume concentration of 2.5mol / L, the solvent is a mixture of deionized water and absolute ethanol, and the volume ratio is 1:1;

[0058] (2) Configure SnCl 4 ·5H 2 O and Zn(NO 3 ) 2 ·6H 2 The mixed solution of O, the solvent is a mixture of deionized water and absolute ethanol, the volume ratio is 1:1, wherein SnCl 4 The concentration of the substance is 0.4575 mol / L; Zn(NO 3 ) 2 The concentration of the substance is 0.0425 mol / L;

[0059] (3) Add the NaOH solution obtained in step (1) dropwise to the SnCl in step (2) 4 and Zn(NO 3 ) 2 In the mixed solution of SnCl 4 and Zn(NO 3 ) 2The volume ratio of the mixed solution and NaOH aqueous solution is 1:2, the dropping rate is 2~3ml / min, and the precursor is obtained by stirring evenly; the above precursor is moved into a hydrothermal reactor, and kept at 180°C f...

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Abstract

The invention relates to a method for thermally synthesizing a nanometer zinc-doped tin oxide / zinc stannate heterojunction by utilizing a solvent. The method comprises the following steps: 1) selecting a certain amount of tin oxide, zinc nitrate and sodium hydroxide, and respectively dissolving in a mixed solvent of water and absolute ethyl alcohol, thereby obtaining a uniform solution; 2) dropwise adding a NaOH solution into a mixed solution of SnC14 and Zn(NO3)2, stirring, and then placing into a reaction kettle, keeping the temperature at 180 DEG C for 15 hours, and separating, washing anddrying the obtained Zn-SnO2; 3) weighting a certain amount of Zn-SnO2, SnC14, Zn(NO3)2 and NaOH, adding into the mixed solvent of water and absolute ethyl alcohol, and continuously and fully stirring; 4) dropwise adding the NaOH solution into a mixed solution of SnC14, Zn(NO3)2 and Zn-SnO2, fully stirring, and then placing into a hydro-thermal reaction kettle, and keeping the temperature at 200 DEG C for 20 hours; and 5) separating, washing and drying, thereby obtaining an end product. The synthesizing technology of the product is simple; the product is 20-30nm spherical grains; the product has the characteristics of a mesoporous structure and has a bigger specific surface area; and the product has an excellent photocatalytic property under an ultraviolet light condition.

Description

technical field [0001] The invention relates to a chemical synthesis method of oxide semiconductor nanopowder, in particular to a method and product for synthesizing nanometer zinc-doped tin oxide / zinc stannate heterojunction. Background technique [0002] Zinc stannate (Zn 2 SnO 4 ) is a wide bandgap n-type ternary compound semiconductor with a spinel structure. Because of its high electron mobility and good conductivity, it can be used in transparent electrodes, flammable gas detection, humidity sensors, lithium Ion battery catalysts and dye-sensitized solar cells have attracted extensive attention in scientific research. Compared with traditional titanium dioxide, Zn 2 SnO 4 The electron mobility and quantum efficiency are high, and the recombination probability of photogenerated electrons and holes is low. As a photocatalyst, its application prospect is broad. Studies have shown that nanostructured Zn 2 SnO 4 With excellent photocatalytic performance, it can effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/32
Inventor 贾铁昆王晓峰郭献军廖桂华刘缙赵军伟付新建
Owner LUOYANG INST OF SCI & TECH
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