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Preparation method of flower ball-shaped micro-nano film photocatalytic material

A photocatalytic material, flower ball-shaped technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult recovery, poor dispersibility, difficult separation of solutions, etc., and achieve convenient recovery. Utilization, good photocatalytic activity, long life effect

Inactive Publication Date: 2012-06-27
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing preparation methods focus on the preparation of powder catalysts. Powder catalysts have the characteristics of large specific surface area, high reaction rate, and easy preparation, but they have fatal shortcomings such as poor dispersion, difficult separation from solutions, and difficult recovery. , especially for fine particles with a micro-nano structure; and immobilizing the catalyst into a film with a micro-nano structure not only retains the tiny scale of the catalyst, but also facilitates solid-liquid separation and reuse, and is not limited to the treatment of organic matter in water. Pollutants, and can be extended to deal with organic pollutants in the air

Method used

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  • Preparation method of flower ball-shaped micro-nano film photocatalytic material
  • Preparation method of flower ball-shaped micro-nano film photocatalytic material
  • Preparation method of flower ball-shaped micro-nano film photocatalytic material

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Experimental program
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Effect test

Embodiment approach 1

[0020] 1) Weigh 0.2 g of analytically pure BiCl 3 Place it in 10mL of ethylene glycol, heat to 60°C, stir to dissolve;

[0021] 2) Use 25%-28% ammonia water to adjust the pH value of the solution to 9, and react for 1 hour to obtain a white emulsion, which is the precursor solution;

[0022] 3) Coat the precursor solution prepared in step 2) on the titanium plate substrate with a clean surface, then place it in an oven at 80°C for drying, then repeat the coating and drying for 30 times, and finally place it at 80°C Dry it in an oven for 3 hours, take it out and soak it in distilled water for cleaning, and then the flower-shaped micro-nano BiOCl thin film photocatalytic material is obtained.

[0023] The prepared film is used for photocatalytic degradation of methyl orange in water. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, take the prepared film 1 cm × 6 cm as the photocatalyst, and blow air from the bottom ...

Embodiment approach 2

[0025] 1) Weigh 0.4 grams of analytically pure BiCl 3 Place it in 20mL of ethylene glycol, heat to 80°C, stir to dissolve;

[0026] 2) Use 25%-28% ammonia water to adjust the pH value of the solution to 7, and react for 1.5 hours to obtain a white emulsion, which is the precursor solution;

[0027] 3) Coat the precursor solution prepared in step 2) on the titanium substrate with a clean surface, then place it in an oven at 75°C for drying, then repeat the coating and drying for 15 times, and finally place it at 75°C Dry it in an oven for 3 hours, take it out and soak it in distilled water for cleaning, and then the flower-shaped micro-nano BiOCl thin film photocatalytic material is obtained.

[0028] The prepared film is used for photocatalytic degradation of methyl orange in water. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, take the prepared film 1 cm × 6 cm as the photocatalyst, and blow air from the bottom...

Embodiment approach 3

[0030] 1) Weigh 0.8 grams of analytically pure BiCl 3 Place it in 40mL of propylene glycol, heat to 80°C, and stir to dissolve it.

[0031] 2) Using ammonia water to adjust the pH value of the solution to 7, and reacting for 2 hours to obtain a white emulsion.

[0032] 3) Apply the emulsion prepared in step 2) to the substrate with a clean surface, and apply it 25 times. After each application, put it in an oven at 80°C to dry and then continue to apply. After all the precursor solution was coated on the substrate, it was dried for 2.5 hours, soaked and cleaned, and the curd-shaped micro-nano BiOCl thin film photocatalytic material was prepared.

[0033] The prepared film is used for photocatalytic degradation of methyl orange in water. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, take the prepared film 1 cm × 6 cm as the photocatalyst, and blow air from the bottom of the reactor , Sampling and analysis at reg...

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Abstract

The invention which relates to a preparation method of a flower ball-shaped micro-nano film photocatalytic material belongs to the technical field of environment chemical engineering photocatalytic water processing. The method which adopts a process combining alcoholysis with coating and allows a BiOCl film to be prepared on a titanium plate matrix comprises the following steps: 1, treating BiCl3 as a raw material and an alcohol as a solvent, adjusting the pH value by ammonia water, and reacting for 1-2h at 40-80DEG C to prepare a liquid precursor; and 2, coating the liquid precursor on the titanium plate matrix, drying, and washing to prepare the flower ball-shaped micro-nano film photocatalytic material having the diameter of 1-2mum and formed by flower balls assembled by nanosheets. The method has the advantages of simple preparation technology, mild condition, short operation period, and convenient realization of batch production, and the prepared film which has a unique space morphology and a good photocatalytic activity can be applied to the photocatalystic degradation of organic pollutants in water or air.

Description

technical field [0001] The invention discloses a method for preparing a curd-shaped micro-nano thin-film photocatalytic material, in particular to a preparation method and application of a curd-shaped micro-nano BiOCl thin-film photocatalytic material, and belongs to the technical field of environmental chemical photocatalysis. Background technique [0002] Recently, bismuth oxychloride (BiOCl), as a semiconductor photocatalytic material with good photocatalytic activity, has attracted great attention from researchers, and has broad development prospects in the field of photocatalytic treatment of organic pollutants. Usually, researchers mainly use hydrolysis or solvothermal method to prepare sheet-like or microspherical BiOCl powder catalysts. Tsinghua University adopts NaBiO 3 BiOX (X=Cl, Br, I) series powder photocatalysts were prepared by conversion hydrolysis, and the catalytic activity of three photocatalysts under xenon lamp was investigated with PCP-Na as the target...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/10C02F1/32C02F1/74
Inventor 樊彩梅李双志刘晓霞王韵芳侯红串王雅文张小超丁光月梁镇海
Owner TAIYUAN UNIV OF TECH
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