Method for massively preparing mesoporous BiVO4/Bi2O3 composite micro-rod p-n heterojunction photocatalyst

A catalyst and mesoporous technology, applied in the field of preparation of mesoporous BiVO4/Bi2O3 composite microrods, can solve the problems of difficult synthesis of composite microrods, and achieve the effects of easy control, good repeatability and low product cost

Inactive Publication Date: 2015-07-15
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is aimed at mesoporous BiVO 4 / Bi 2 o 3 The problem of difficult synthesis of composite microrods provides a low-cost, easy-to-control, and reproducible preparation of mesoporous BiVO 4 / Bi 2 o 3 Method for composite microrod p-n junction photocatalyst

Method used

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  • Method for massively preparing mesoporous BiVO4/Bi2O3 composite micro-rod p-n heterojunction photocatalyst
  • Method for massively preparing mesoporous BiVO4/Bi2O3 composite micro-rod p-n heterojunction photocatalyst
  • Method for massively preparing mesoporous BiVO4/Bi2O3 composite micro-rod p-n heterojunction photocatalyst

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Embodiment 1

[0022] A preparation of mesoporous BiVO 4 / Bi 2 o 3 A method for composite microrod p-n junction photocatalysts, the preparation of mesoporous BiVO 4 / Bi 2 o 3 The method for composite microrod p-n junction photocatalyst comprises the following steps:

[0023] (1) Weigh 0.1698g (0.35mmol) Bi(NO 3 )3 ·5H 2 O, 0.5g (4.5mmol) PVP, dissolved in 15ml ethylene glycol and dispersed by ultrasonic to form Bi 3+ A homogeneous solution A with a molar concentration of 0.023M, pour solution A into a round bottom flask and magnetically stir at room temperature;

[0024] ⑵ Weigh 0.0375g (0.28mmol) Na 2 C 2 o 4 Dissolved in 10mL distilled water to obtain oxalate (C 2 o 4 2- ) solution B with a molar concentration of 0.028M, adding solution B to solution A dropwise, the solution gradually becomes cloudy, after the addition is completed, stir for 15 to 20 minutes to obtain mixed solution C;

[0025] (3) Weigh 0.0085g (0.07mmol) NaVO 3 Dissolved in 15mL distilled water to obtain m...

Embodiment 2

[0030] A preparation of mesoporous BiVO 4 / Bi 2 o 3 A method for composite microrod p-n junction photocatalysts, the preparation of mesoporous BiVO 4 / Bi 2 o 3 The method for composite microrod p-n junction photocatalyst comprises the following steps:

[0031] (1) Weigh 0.097g (0.2mmol) Bi(NO 3 ) 3 ·5H 2 O, 0.5g (4.5mmol) PVP, dissolved in 15ml ethylene glycol and dispersed by ultrasonic to form Bi 3+ A homogeneous solution A with a molar concentration of 0.013M, pour solution A into a round bottom flask and magnetically stir at room temperature;

[0032] ⑵ Weigh 0.0214g (0.16mmol) Na 2 C 2 o 4 Dissolved in 10mL distilled water to obtain oxalate (C 2 o 4 2- ) Solution B with a molar concentration of 0.016M, adding solution B to solution A dropwise, the solution gradually becomes cloudy, after the addition is completed, stir for 15 to 20 minutes to obtain mixed solution C;

[0033] (3) Weigh 0.0049g (0.04mmol) NaVO 3 Dissolved in 15mL distilled water to obtain m...

Embodiment 3

[0038] A preparation of mesoporous BiVO 4 / Bi 2 o 3 A method for composite microrod p-n junction photocatalysts, the preparation of mesoporous BiVO 4 / Bi 2 o 3 The method for composite microrod p-n junction photocatalyst comprises the following steps:

[0039] (1) Weigh 0.194g (0.4mmol) Bi(NO 3 ) 3 ·5H 2 O, 0.5g (4.5mmol) PVP, dissolved in 15ml ethylene glycol and dispersed by ultrasonic to form Bi 3+ A homogeneous solution A with a molar concentration of 0.027M, pour solution A into a round bottom flask and magnetically stir at room temperature;

[0040] ⑵ Weigh 0.0429g (0.32mmol) Na 2 C 2 o 4 Dissolved in 10mL distilled water to obtain oxalate (C 2 o 4 2- ) Solution B with a molar concentration of 0.032M, adding solution B to solution A dropwise, the solution gradually becomes cloudy, after the addition is completed, stir for 15 to 20 minutes to obtain mixed solution C;

[0041] (3) Weigh 0.0098g (0.08mmol) NaVO 3 Dissolved in 15mL distilled water to obtain m...

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Abstract

The invention relates to a method for massively preparing a mesoporous BiVO4 / Bi2O3 composite micro-rod p-n heterojunction photocatalyst. The method for massively preparing the mesoporous BiVO4 / Bi2O3 composite micro-rod p-n heterojunction photocatalyst takes metal inorganic salt-bismuth nitrate pentahydrate (Bi (NO3) 3.5H2O) as a reaction precursor, polyvinylpyrrolidone (PVP) as a surface active agent as well as sodium oxalate (Na2C2O4) and sodium metavanadate (NaVO3) as reactants; the method comprises the steps of feeding the surface active agent into the reaction precursor, carrying out a solvothermal reaction, centrifuging, washing, drying, and carrying out solid-phase reaction calcination on the obtained product at the temperature of 300-400 DEG C to obtain the BiVO4 / Bi2O3 composite micro-rod p-n heterojunction photocatalyst. The prepared mesoporous BiVO4 / Bi2O3 composite micro-rod p-n heterojunction photocatalyst has the length of about 3.5-4.5mu m, the diameter of about 0.7-0.9mu m and the mesoporous average diameter of 30.0nm. The prepared mesoporous BiVO4 / Bi2O3 composite micro-rod p-n heterojunction photocatalyst has the characteristics of being low in cost, easy to control, good in repeatability, and the like.

Description

technical field [0001] The present invention belongs to mesoporous BiVO 4 / Bi 2 o 3 Composite microrod preparation technology field, especially related to a kind of mesoporous BiVO 4 / Bi 2 o 3 A solid-state reaction chemical synthesis method for composite microrod p-n junction photocatalysts. Background technique [0002] Bismuth vanadate (BiVO 4 ) As an important semiconductor material, it has become a popular inorganic material because it is not harmful to the human body and the environment. BiVO 4 It can promote chemical reactions when exposed to the light of the sun and fluorescent lamps. It can kill a variety of bacteria and viruses. In the process of accelerating chemical reactions, it does not cause waste of resources and additional pollution. This is in line with low-carbon economy. Development needs, so BiVO 4 It has a wide range of applications in the fields of pigments and photocatalytic degradation. At present, the literature reports the preparation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/10
Inventor 胡勇毛梦梦
Owner ZHEJIANG NORMAL UNIVERSITY
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