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Micro/nano-structure rod-like Bi2O3 photocatalytic material and preparation method thereof

A technology of photocatalytic materials and micro-nano structures, applied in chemical instruments and methods, physical/chemical process catalysts, water/sludge/sewage treatment, etc., can solve the problem of large nano-powder size, limited adsorption performance, and low specific surface area and other problems, to achieve good dispersion and separation characteristics, improve reusability, and high specific surface area

Inactive Publication Date: 2017-02-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of Bi by prior art 2 o 3 The nanopowders mainly adopt the solvothermal method, and the synthesized Bi 2 o 3 The size of the nanopowder is large, resulting in a low specific surface area, which limits the further improvement of its adsorption performance
In addition, solvothermal synthesis technology requires high temperature and high pressure environment, and the synthesis conditions are harsh, which is not conducive to Bi 2 o 3 The macro-preparation of nano-powder greatly limits its further popularization and application

Method used

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  • Micro/nano-structure rod-like Bi2O3 photocatalytic material and preparation method thereof
  • Micro/nano-structure rod-like Bi2O3 photocatalytic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A rod-shaped Bi with micro-nano structure 2 o 3 The preparation method of photocatalytic material, concrete steps are as follows:

[0024] (1) 8mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20mL concentration of 0.1M mannitol aqueous solution, completely dissolved to obtain bismuth nitrate solution for subsequent use;

[0025] (2) the configuration concentration is an aqueous solution of Planckney F-127 of 1 mM;

[0026] (3) Under ultrasonic conditions, slowly add the Planckney F-127 aqueous solution to the bismuth nitrate solution, and after the addition is completed, continue ultrasonication for 10 minutes to form a mixed solution I;

[0027] (4) Under ultrasonic conditions, add 0.1M ascorbic acid solution to the mixed solution I to form Bi 3+ For the mixed solution II with a concentration of 0.01M, the mixed solution II was continuously ultrasonicated for 1 hour, then allowed to stand for 10 hours, fully reacted to form a light yellow precipitate, washed with deion...

Embodiment 2

[0032] The preparation method of this embodiment is the same as that of Example 1, except that the solvent of the bismuth nitrate solution in step (1) is modified from 20 mL of 0.1 M mannitol aqueous solution to 20 mL of 0.1 M ethylene glycol.

[0033] Rod-shaped Bi prepared by this process 2 o 3 The photocatalytic material has a diameter of about 40nm and a length of about 1μm. It has a strong adsorption capacity. The adsorption rate of 40mg / L methyl orange within 30min is 96.2%, and the degradation rate of 20mg / L methyl orange under visible light is 60%.

Embodiment 3

[0035] The preparation method of the present embodiment is the same as that of Example 1, except that Bi(NO 3 ) 3 ·5H 2 The amount of O added was changed from 8mmol to 16mmol.

[0036] Rod-shaped Bi prepared by this process 2 o 3 The photocatalytic material has a diameter of about 40nm and a length of about 1μm. It has a strong adsorption capacity. The adsorption rate of 40mg / L methyl orange within 30min is 93.2%, and the degradation rate of 20mg / L methyl orange under visible light is about 60%.

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Abstract

The invention relates to the technical fields of micro / nano structures and photocatalytic degradation of organic pollutants, particularly a micro / nano-structure rod-like Bi2O3 photocatalytic material and a preparation method thereof. The diameter of the micro / nano-structure rod-like Bi2O3 photocatalytic material is 20-40nm, and the length is 0.5-2 mu m; and the micro / nano-structure rod-like Bi2O3 photocatalytic material is formed by self-assembling Bi2O3 nanoparticles with the diameter of 2-10nm. The photocatalytic material is prepared from bismuth nitrate, ascorbic acid and Pluronic by a chemical deposition process at normal temperature under normal pressure. The method has the advantage of mild preparation conditions, and can perform mass preparation. The micron-size rod-like Bi2O3 photocatalytic material has favorable recoverability. Due to the Bi2O3 nanoparticle self-assembly system, the photocatalytic material has the advantages of higher specific area and more reaction active spots, and can be effectively used for photocatalytic degradation of organic matters in the water body.

Description

technical field [0001] The invention relates to the technical field of micro-nano materials and photocatalytic degradation of organic pollutants, in particular to a rod-shaped Bi with micro-nano structure 2 o 3 Photocatalytic material and its preparation method. Background technique [0002] With the rapid development of modern society, more and more organic pollutants such as industrial waste, household garbage, residual pesticides and telephone bills enter the water bodies that human beings rely on through various channels. How to achieve efficient removal of organic pollutants has become a important research topic. The use of photocatalytic technology to degrade and eliminate organic pollution such as wastewater in industrial production processes has become one of the effective ways to control environmental pollution, especially the development of nano-photocatalytic materials with high specific surface area and high activity for photocatalytic removal of organic pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C02F1/30
CPCC02F1/30B01J23/18C02F2101/308B01J35/39
Inventor 徐光青张旭范程控吕珺吴玉程
Owner HEFEI UNIV OF TECH
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