Catalyst Bi2O3/Bi2MoO6 for photodegradation of organic matters and method for preparing the same

A catalyst and organic matter technology, applied in the field of photodegradation organic matter catalyst Bi2O3/Bi2MoO6 and its preparation, can solve the problems of large band gap, inability to absorb visible light, etc., and achieve the effects of high yield, low production cost and high purity

Inactive Publication Date: 2012-09-12
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0003] In the last three decades, titanium dioxide has been a hot spot in the photocatalytic degradation of organic matter, but due to its large band gap (> 3.2eV), it can only respond to a small amount of ultraviolet light in sunlight, but cannot Good absorption of visible light

Method used

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  • Catalyst Bi2O3/Bi2MoO6 for photodegradation of organic matters and method for preparing the same
  • Catalyst Bi2O3/Bi2MoO6 for photodegradation of organic matters and method for preparing the same
  • Catalyst Bi2O3/Bi2MoO6 for photodegradation of organic matters and method for preparing the same

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Embodiment Construction

[0011] Synthesis of catalyst material of the present invention:

[0012] First, 6 mmol (2.9105 g) of bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) Disperse evenly in 15 ml of deionized water, stir evenly to obtain A solution. Then 0.357 mmol (0.4414 g) of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) was dissolved in 10 ml of deionized water and stirred until completely dissolved to obtain solution B. Then slowly pour B solution into A, stir at room temperature for 30 minutes, add 5 mol / L sodium hydroxide solution, adjust the pH value of the solution to 1.0, and put the above solution into a 100 ml polytetrafluoroethylene reaction kettle , and then placed in a 150°C muffle furnace for calcination for 5 hours. The calcined sample was filtered and washed several times, and then placed in a muffle furnace for calcination at 300° C. for 5 hours to obtain the target catalyst.

[0013] Such as figure 1 , figure 2 , image 3 Shown, show through X-ray powder diffraction test, ...

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Abstract

A catalyst Bi2O3 / Bi2MoO6 for photodegradation of organic matters is synthesized by a one-step hydrothermal method. The catalyst is composed of bismuth oxide (Bi2O3) and bismuth molybdenum oxide (Bi2MoO6), wherein the mole ratio of bismuth oxide and bismuth molybdenum oxide is 20%. With the visible light induction, 0.1 gram of the catalyst can completely degrade 100 milliliters of Rhodamine B of 10-5 mol / liter in 80 minutes. The advantages are that: 1. the catalyst is directly synthesized by the one-step hydrothermal method which is simple in operation, low in production cost, high in synthesis yield and purity, and good in repeatability, and suitable for magnified production; 2. the catalyst has a stable heat stability and a strong resistance to acids and alkalis; 3. the catalyst prepared has a better effect on photocatalytic degradation of organic matters than that of single bismuth molybdenum oxide (Bi2MoO6) or single bismuth oxide (Bi2O3) or Bi2O3 / Bi2MoO6 heterojunction with other load ratios.

Description

technical field [0001] The invention relates to a photodegradation organic matter catalyst Bi 2 o 3 / Bi 2 MoO 6 and its preparation method. Background technique [0002] With the development of society and the improvement of people's living standards, industrial wastewater and domestic sewage account for an important part of environmental pollution and become an important issue that people have to consider. In 1972, Fujishima and Honda adopted TiO 2 The electrode, which splits water upon exposure to light, marks the beginning of a new era in photocatalysis. Subsequently, Carey et al. used ultraviolet light to irradiate TiO 2 The aqueous solutions of polychlorinated biphenyls and chlorinated alkanes in the presence of photocatalysts can undergo effective dechlorination reactions, which makes it possible to photocatalytically degrade organic matter. [0003] In the last three decades, titanium dioxide has been a hot spot in the photocatalytic degradation of organic ma...

Claims

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Application Information

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IPC IPC(8): B01J23/31B01J37/10C02F1/30C02F103/30
CPCY02W10/37
Inventor 邹建平张龙珠林国涛林方程马俊雷斯亮王玉华
Owner NANCHANG HANGKONG UNIVERSITY
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