A photocatalyst bi 4 o 5 br 2 The synthesis and application method of

A photocatalyst and synthesis method technology, applied in the field of nanomaterials, can solve the problems of impure catalyst, low Br content, long time required, etc., and achieve the effects of good photocatalytic activity, stable performance and single composition

Active Publication Date: 2016-08-24
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But as far as the current research is concerned, high temperature and high pressure are often required in the preparation process of this type of catalyst, and the method is complicated and takes a long time. More importantly, the prepared catalyst is impure and mostly a mixture, so how to find A simple, economical and environmentally friendly preparation method is proposed to obtain pure Bi with relatively low Br content and effective response to visible light. x o y Br z A series of catalysts has great practical significance, and it is also a long-term and arduous task in the field of photocatalytic technology

Method used

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  • A photocatalyst bi <sub>4</sub> o <sub>5</sub> br <sub>2</sub> The synthesis and application method of
  • A photocatalyst bi <sub>4</sub> o <sub>5</sub> br <sub>2</sub> The synthesis and application method of
  • A photocatalyst bi <sub>4</sub> o <sub>5</sub> br <sub>2</sub> The synthesis and application method of

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Experimental program
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Effect test

Embodiment approach 1

[0019] 4.85g Bi(NO 3 ) 3 ·5H 2 O was added to 40 mL of ethylene glycol and stirred at room temperature for 1.5 h, then 1.19 g of KBr was added under stirring, and continued stirring until a clear solution was formed, then 16 mL of H was added to the solution. 2 O and 4 mL NH 3 ·H 2 A mixed solution of O, adjust the pH of the solution to 9, and react continuously for 4 hours under this condition until a precipitate is formed, and finally separate, wash and dry the obtained precipitate to obtain Bi 4 o 5 Br 2 Catalyst, denoted as Bi 4 o 5 Br 2 -A.

[0020] Income Bi 4 o 5 Br 2 -A photocatalyst is used for photocatalytic degradation of resorcinol and bisphenol A solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.1g, the treatment amount of organic pollutant resorcinol or bisphenol A in water is 100mL, 10mg·L -1 , the light source used is a xenon lamp, the power is 500W, the illuminance is 120klx, and the distance from...

Embodiment approach 2

[0022] 0.5g BiBr 3 Add it into 15mL of ethylene glycol solvent, stir and dissolve at room temperature for 1h, after a clear liquid is formed, add 1mL of NH 3 ·H 2 O, adjust the pH value of the solution to 8, and then continue to react under this condition for 6h until the precipitate is formed, and the resulting precipitate is separated, washed and dried to obtain Bi 4 o 5 Br 2 Catalyst, denoted as Bi 4 o 5 Br 2 -B.

[0023] Income Bi 4 o 5 Br 2 -B photocatalyst is used for photocatalytic degradation of resorcinol and bisphenol A solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.1g, and the treatment amount of organic pollutant resorcinol or bisphenol A in water is 50mL, 10mg·L -1, the light source used is a xenon lamp, the power is 500W, the illuminance is 120klx, and the distance from the reaction interface is 20cm, and the emitted light is visible light with a wavelength greater than 420nm. The photocatalytic deg...

Embodiment approach 3

[0025] 0.5g BiBr 3 Add it into 15mL of propylene glycol solvent, stir and dissolve at room temperature for 2h, after forming a clear liquid, add 1mL of NH 3 ·H 2 O, adjust the pH of the solution to 8, and then react for 8 hours until the precipitate is formed, and the precipitate is separated, washed and dried to obtain Bi 4 o 5 Br 2 Catalyst, denoted as Bi 4 o 5 Br 2 -C.

[0026] Income Bi 4 o 5 Br 2 -C photocatalyst is used for photocatalytic degradation of resorcinol and bisphenol A solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.1g, the treatment amount of organic pollutant resorcinol or bisphenol A in water is 100mL, 10mg·L -1 , the light source used is a xenon lamp, the power is 500W, the illuminance is 120klx, and the distance from the reaction interface is 20cm, and the emitted light is visible light with a wavelength greater than 420nm. The photocatalytic degradation experiment of diphenol or bisphenol A ...

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Abstract

The invention relates to a synthesis method and an application method of a photocatalyst Bi4O5Br2 and belongs to the technical field of environmental chemical photocatalytic water treatment. The synthesis method of the photocatalyst Bi4O5Br2 is characterized in that Bi(NO3)3.5H2O and KBr are taken as raw materials, or BiBr3 is taken as a raw material directly, in an ethanediol or propanediol solvent, stronger ammonia water is utilized as a pH regulator, and a simple, economic and environment-friendly alcoholysis method is utilized for preparing novel Bi4O5Br2 photocatalyst powder with a narrow band gap, strong visible-light response capability and single composition at room temperature. The synthesis method of the photocatalyst Bi4O5Br2 can be realized at low temperature, has no high temperature or high pressure requirement and is simple, feasible, economic and environmentally friendly, and the prepared photocatalyst is single and pure in variety, narrow in band gap, shows good response capability and photocatalytic degradation capacity in visible lights and has great significance in environmental management and environment-friendly energy utilization.

Description

technical field [0001] A kind of photocatalyst Bi of the present invention 4 o 5 Br 2 The synthesis and application method of the present invention belong to the technical field of nanomaterials, and specifically relate to a novel photocatalyst Bi that can be used to degrade organic pollutants in the environment. 4 o 5 Br 2 method of preparation and application. Background technique [0002] With the increasingly serious problems of environmental pollution and energy crisis in recent years, heterogeneous photocatalytic oxidation technology, as a green, cost-effective and efficient catalytic method, is because of its simple operation, no pollution, thorough reaction, fast rate, and the energy used Renewable, and is recognized internationally as a technology with the most application prospects. The most widely used photocatalyst is TiO 2 , people have done a lot of modification and modification work on this kind of catalyst, but due to its inherent wide bandgap (2.96-3....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C01G29/00C02F1/30
Inventor 樊彩梅李瑞金州洋谢芳霞毛晓明王雅文张小超王韵芳
Owner TAIYUAN UNIV OF TECH
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