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Method for preparing visible-light response photocatalyst by utilizing nano Zn2SnO4

A photocatalyst and visible light technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of low recombination probability of photogenerated electrons and holes The problems of low electron mobility and high quantum efficiency achieve excellent photocatalytic performance, simple synthesis process, and shortened migration distance.

Active Publication Date: 2017-03-22
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zinc stannate (Zn 2 SnO 4 ) as a new type of wide bandgap photocatalyst, its bandgap width is about 3.6eV, its electron mobility and quantum efficiency are high, photogenerated electron and hole recombination probability is low, and it can effectively degrade NO and HCHO and Organic pollutants, but currently on Zn 2 SnO 4 Most of the photocatalytic research is limited to the ultraviolet region, and its photocatalytic activity is not high under the condition of visible light, so it is necessary to study the nano-Zn 2 SnO 4 modified to enhance its visible light catalytic performance
In this study, Zn was synthesized by hydrothermal 2 SnO 4 Nano powder is used as raw material, modified by hydrothermal reaction to obtain ZnSnO 3 Ultrafine nano-powder, the product has excellent photocatalytic performance under visible light conditions, and the preparation method of this new visible light catalyst has not been reported yet

Method used

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  • Method for preparing visible-light response photocatalyst by utilizing nano Zn2SnO4
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  • Method for preparing visible-light response photocatalyst by utilizing nano Zn2SnO4

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Embodiment 1

[0024] Nano Zn 2 SnO 4 The method for preparing a visible light-responsive photocatalyst comprises the following steps: step 1, taking a certain amount of sodium hydroxide powder, dissolving it completely in a solvent, stirring and dissolving to prepare a NaOH solution with a concentration of 3.75mol / L , marked as solution A, for subsequent use; wherein the solvent used is deionized water;

[0025] Step 2, take a certain amount of tin tetrachloride and zinc chloride and dissolve in the solvent to form a mixed solution, fully stir and dissolve the Sn in the mixed solution prepared 4+ with Zn 2+ Concentrations are 0.25mol / L and 0.5mol / L respectively, marked as mixed solution B, standby; wherein the solvent used is deionized water;

[0026] Step 3: Take 2 parts of solution A prepared in step 1 and 1 part of mixed solution B prepared in step 2 in parts by volume, and add the measured solution A at a rate of 2 mL / min to In the mixed solution B, the suspension is obtained after ...

Embodiment 2

[0034] Nano Zn 2 SnO 4 The method for preparing a visible light-responsive photocatalyst comprises the following steps: step 1, taking a certain amount of sodium hydroxide powder, dissolving it completely in a solvent, stirring and dissolving to prepare a NaOH solution with a concentration of 3.75mol / L , marked as solution A, for subsequent use; wherein the solvent used is deionized water;

[0035] Step 2, take a certain amount of tin tetrachloride and zinc chloride and dissolve in the solvent to form a mixed solution, fully stir and dissolve the Sn in the mixed solution prepared 4+ with Zn 2+ Concentrations are 0.25mol / L and 0.5mol / L respectively, marked as mixed solution B, standby; wherein the solvent used is deionized water;

[0036] Step 3: Take 2 parts of solution A prepared in step 1 and 1 part of mixed solution B prepared in step 2, in parts by volume, and add the measured A solution to the In the mixed solution B, the suspension is obtained after full reaction, an...

Embodiment 3

[0042] Nano Zn 2 SnO 4 The method for preparing a visible light-responsive photocatalyst comprises the following steps: step 1, taking a certain amount of sodium hydroxide powder, dissolving it completely in a solvent, stirring and dissolving to prepare a NaOH solution with a concentration of 3.75mol / L , marked as solution A, for subsequent use; wherein the solvent used is deionized water;

[0043] Step 2, take a certain amount of tin tetrachloride and zinc chloride and dissolve in the solvent to form a mixed solution, fully stir and dissolve the Sn in the mixed solution prepared 4+ with Zn 2+ Concentrations are 0.25mol / L and 0.5mol / L respectively, marked as mixed solution B, standby; wherein the solvent used is deionized water;

[0044] Step 3: Take 2 parts of solution A prepared in step 1 and 1 part of mixed solution B prepared in step 2, in parts by volume, and add the measured A solution to the In the mixed solution B, the suspension is obtained after full reaction, an...

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Abstract

The invention discloses a method for preparing a visible-light response photocatalyst by utilizing nano Zn2SnO4. The method comprises a step of preparing a solvent thermal product, a step of preparing Zn2SnO4 nano powder, a step of preparing a turbid liquid, a step of preparing a hydrothermal reaction product and a step of preparing the visible-light response photocatalyst. According to the method disclosed by the invention, a synthesis process is simple and convenient, impurities introduced by follow-up processes such as high-temperature calcining and ball-milling and structure defects are avoided, operations are easy, and purity of products synthesized by reaction is high. The visible-light response photocatalyst synthesized by the method is a nano structure, is small in crystalline grain, and has a mesoporous structure and a relatively great surface area, so that light absorption capacity of the visible-light response photocatalyst is strengthened; and meanwhile, a migration distance of light-generated electrons is shortened, and recombination probability of light-generated electrons and electron-hole pairs is reduced.

Description

technical field [0001] The invention relates to a method utilizing nano Zn 2 SnO 4 Method for preparing visible light-responsive photocatalysts. Background technique [0002] Traditional titanium dioxide is an important n-type semiconductor, which can be used in solar cells, photocatalytic degradation of organic pollutants and hydrogen production by photolysis of water. However, TiO 2 The band gap energy is large, and it only shows better photocatalytic activity under ultraviolet light conditions, and is susceptible to photoerosion. [0003] Therefore, further development of novel visible light-responsive photocatalysts is required. Zinc stannate (Zn 2 SnO 4 ) as a new type of wide bandgap photocatalyst, its bandgap width is about 3.6eV, its electron mobility and quantum efficiency are high, photogenerated electron and hole recombination probability is low, and it can effectively degrade NO and HCHO and Organic pollutants, but currently on Zn 2 SnO 4 Most of the phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/30C02F101/30
CPCB01J23/14C02F2101/308B01J35/39
Inventor 贾铁昆付芳朱新军李继利闵志宇赵真真李少敏徐倩楠
Owner LUOYANG INST OF SCI & TECH
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