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Method for preparing cubic structured zinc stannate photocatalyst responding to sunshine

A technology of structural zinc stannate and photocatalyst, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low utilization efficiency and limit the industrial application of nano-TiO2 and other problems, to achieve the effect of high degradation efficiency

Active Publication Date: 2018-06-01
HENAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But due to TiO 2 The forbidden band of TiO is wide (3.2eV), and it can only respond to ultraviolet light below 387nm, and the utilization efficiency of visible light, which accounts for most of the solar spectrum, is low, which limits the use of nano-TiO. 2 industrial application of

Method used

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  • Method for preparing cubic structured zinc stannate photocatalyst responding to sunshine
  • Method for preparing cubic structured zinc stannate photocatalyst responding to sunshine

Examples

Experimental program
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Effect test

Embodiment 1

[0012] 2.1036g SnCl 4 ·5H 2 O was dissolved in 30mL ethanol to obtain solution A; 0.8178g ZnCl 2 Dissolve in 60mL water to obtain solution B; mix solution A and solution B, adjust the pH of the mixed system to 3 with 2mol / L sodium hydroxide solution, then filter the mixed solution, wash with water, and dry to obtain zinc stannate photocatalyst , the zinc stannate photocatalyst was exposed to natural sunlight for 5 hours, and the removal rate of methylene blue was 11.05%.

Embodiment 2

[0014] 2.1036g SnCl 4 ·5H 2 O was dissolved in 30mL ethanol to obtain solution A; 0.8178g ZnCl 2 Dissolve in 60mL water to obtain solution B; mix solution A and solution B, adjust the pH of the mixed system to 7 with 2mol / L sodium hydroxide solution, then filter the mixed solution, wash with water, and dry to obtain zinc stannate photocatalyst , the zinc stannate photocatalyst was exposed to natural sunlight for 5 hours, and the removal rate of methylene blue was 11.05%.

Embodiment 3

[0016] 2.1036g SnCl 4 ·5H 2 O was dissolved in 30mL ethanol to obtain solution A; 0.8178g ZnCl 2 Dissolve in 60mL water to obtain solution B; mix solution A and solution B, adjust the pH of the mixed system to 9 with 2mol / L sodium hydroxide solution, then filter the mixed solution, wash with water, and dry to obtain zinc stannate photocatalyst , the zinc stannate photocatalyst was exposed to natural sunlight for 5 hours, and the removal rate of methylene blue was 42.29%.

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Abstract

The invention discloses a method for preparing a cubic structured zinc stannate photocatalyst responding to sunshine. The method comprises the following steps: dissolving 2.1036g of SnCl4*5H2O into 30mL of ethanol so as to obtain a solution A; dissolving 0.8178g of ZnCl2 into 60mL of water so as to obtain a solution B; mixing the solution A with the solution B, adjusting the pH value of the mixedsystem to 11.10 by using a sodium hydroxide solution, further filtering a mixed liquid, washing with water, and drying, thereby obtaining the cubic structured zinc stannate photocatalyst responding tosunshine. The stannate photocatalyst with high activity is prepared by using a method that the pH value of a system is regulated and controlled, and the stannate photocatalyst has the characteristicof being relatively high in degradation efficiency upon organic pollutants under natural sunshine.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photocatalytic materials, and in particular relates to a preparation method of a cubic structure zinc stannate photocatalyst responding to sunlight. Background technique [0002] Studies in recent years have shown that compared with traditional methods, semiconductor photocatalysts can effectively remove organic pollutants in wastewater, and have the advantages of fast reaction rate, wide application range, easy operation, and effective for refractory organic wastewater with poor biochemical properties. with TiO 2 The representative semiconductor material is the most classic and the most studied photocatalyst. But due to TiO 2 The band gap of TiO is wide (3.2eV), and it can only respond to ultraviolet light below 387nm, and the utilization efficiency of visible light, which accounts for most of the solar spectrum, is low, which limits the use of nano-TiO. 2 industrial applications. Theref...

Claims

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Application Information

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IPC IPC(8): B01J23/14
CPCB01J23/14B01J35/39
Inventor 董淑英夏隆基崔龄芳张方圆禹崇菲赵银兰吴亚雯孙剑辉
Owner HENAN NORMAL UNIV
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