Synthetic method and application of photocatalyst Bi5O7Br

A photocatalyst and synthesis method technology, applied in the field of nanomaterials, can solve the problems of single composition and narrow band gap, and achieve the effect of single composition, narrow band gap and good photocatalytic activity

Active Publication Date: 2019-08-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at existing Bi 5 o 7 The preparation of Br catalyst requires high temperature and high pressure, long-term reaction and organic solvent dissolution, etc., providing a photocatalyst Bi 5 o 7 The synthesis method of Br and its application, the purpose of the present invention is to provide a kind of simple, economical and environment-friendly hydrolysis method at room temperature, to prepare a novel photocatalyst with narrow band gap, strong visible light response ability and single composition, so as to achieve the The full and effective use of solar energy and the efficacy of degrading residual drugs in water

Method used

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  • Synthetic method and application of photocatalyst Bi5O7Br
  • Synthetic method and application of photocatalyst Bi5O7Br
  • Synthetic method and application of photocatalyst Bi5O7Br

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 4.85 g Bi(NO 3 ) 3 ·5H 2 O was added to 50 mL of distilled water and stirred at room temperature for 1.5 h, 1.51 g of NaBrO 3 Add it into 40 mL of distilled water and stir at room temperature for 1.5 h, mix the two solutions, add 2.5 mL of ammonia water to adjust the pH of the solution, and react continuously for 3 h under this condition until a precipitate is formed, and finally the obtained precipitate is separated, washed and dried Dry, you can get Bi 5 o 7 Br catalyst, denoted as Bi 5 o 7 Br-A.

[0022] Income Bi 5 o 7 Br-A photocatalyst was used for photocatalytic degradation of carbamazepine and tetracycline hydrochloride solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.05 g, the treatment amount of trace drug pollutants carbamazepine or tetracycline hydrochloride in water is 100 mL, 10 mg·L -1 , the light source used is a xenon lamp with a power of 500 W, an illumination of 120 klx, and a distance of 20...

Embodiment 2

[0024] 0.485 g Bi(NO 3 ) 3 ·5H 2 O was added to 20 mL of distilled water and stirred at room temperature for 1.5 h, 0.151 g of NaBrO 3 Added into 15 mL of distilled water and stirred at room temperature for 1.5 h, mixed the two solutions, added 1 mL of ammonia water to adjust the pH of the solution, and reacted continuously for 3 h under this condition until a precipitate formed, and finally separated, washed and dried the obtained precipitate Dry, you can get Bi 5 o 7 Br catalyst, denoted as Bi 5 o 7 Br-B.

[0025] Income Bi 5 o 7 Br-B photocatalyst was used for photocatalytic degradation of carbamazepine and tetracycline hydrochloride solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.05 g, the treatment amount of trace drug pollutants carbamazepine or tetracycline hydrochloride in water is 100 mL, 10 mg·L -1, the light source used is a xenon lamp with a power of 500 W, an illumination of 120 klx, and a distance of 2...

Embodiment 3

[0027] 4.85 g Bi(NO 3 ) 3 ·5H 2 O was added to 50 mL of distilled water and stirred at room temperature for 1.5 h, 1.51 g of NaBrO 3 Add it into 40 mL of distilled water and stir at room temperature for 1.5 h, mix the two solutions, add 3 mL of ammonia water to adjust the pH of the solution, and continue to react under this condition for 3 h until a precipitate is formed, and finally the obtained precipitate is separated, washed and dried Dry, you can get Bi 5 o 7 Br catalyst, denoted as Bi 5 o 7 Br-C.

[0028] Income Bi 5 o 7 Br-C photocatalyst was used for photocatalytic degradation of carbamazepine and tetracycline hydrochloride solution. The reaction conditions are: normal temperature and pressure, the amount of catalyst is 0.05 g, the treatment amount of trace drug pollutant carbamazepine or tetracycline hydrochloride in water is 100 mL, 10 mg·L -1 , the light source used is a xenon lamp with a power of 500 W, an illumination of 120 klx, and a distance of 20 cm ...

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Abstract

The invention discloses a synthetic method and application of photocatalyst Bi5O7Br, belongs to the technical field of nano materials, and can solve the problem that current preparation of a Bi5O7Br catalyst requires conditions such as high temperature, high pressure, long-term reaction and an organic solvent for dissolution. The Bi5O7Br photocatalyst with a narrower band gap, stronger visible light response capability and single composition is obtained by using bismuth nitrate pentahydrate and sodium bromate as raw materials and ammonia water as a pH adjusting agent through a simple economical environmentally-friendly normal-temperature hydrolysis process. According to the method provided by the invention, the raw materials used in the method are cheap and easy to obtain, no organic solvent is used, and the method is simple, easy to implement, economical and environmentally friendly, does not produce toxic or harmful by-products, uses normal-temperature normal-pressure conditions, issimple and safe, and easily realizes industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a photocatalyst Bi 5 o 7 The synthesis method of Br and its application can be used to degrade drugs in the environment. Background technique [0002] In recent years, pharmaceutical preparations have been frequently detected in drinking water, seriously threatening the ecological environment and human health. This type of new type of drug pollution has become one of the major environmental problems facing the world and our country. The heterogeneous photocatalytic oxidation technology has shown a good application prospect in the drug removal technology due to its high efficiency, energy saving, low cost, simple operation and sustainable application. [0003] Among many photocatalysts, BiOBr semiconductor photocatalyst has been favored and concerned by researchers from all over the world when it was discovered due to its unique open layered structure, indirect transition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/03C01G29/00C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J27/06B01J37/031B01J35/004C01G29/00C02F1/30C02F2101/30C02F2101/34C02F2101/38
Inventor 李瑞樊彩梅张璐璐谢芳霞刘建新张小超张长明王雅文王韵芳
Owner TAIYUAN UNIV OF TECH
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