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Preparation method of bismuth phosphate (BiPO4) photocatalysts differing in structure

A photocatalyst, bismuth phosphate technology, applied in chemical instruments and methods, physical/chemical process catalysts, phosphorus compounds, etc., can solve the problems of low light utilization efficiency, less research on preparation methods, and high electron-hole recombination efficiency. , to achieve the effect of easy identification, low cost and high crystallinity

Inactive Publication Date: 2013-05-22
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, people have begun to explore more efficient nanomaterials, and the shortcomings of original materials such as low light utilization efficiency and high recombination efficiency of electrons and holes generated by photocatalysts have been improved.
In the process of photocatalysis research, with some photocatalysts such as BiVO 4 , SrTiO 3 etc. have been studied in depth, BiPO 4 The potential of photocatalytic degradation of organic matter has gradually been discovered by researchers. The unique crystal structure and electronic structure of this highly active bismuth-based non-metal oxo-salt photocatalyst have a wide absorption band gap, and the efficiency of organic matter degradation is very high. However, at present, the research is on the controllable synthesis of bismuth phosphate nanorods and the photocatalytic performance of bismuth phosphate in the form of nanorods, and there is less research on the preparation methods of other structures of bismuth phosphate

Method used

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  • Preparation method of bismuth phosphate (BiPO4) photocatalysts differing in structure
  • Preparation method of bismuth phosphate (BiPO4) photocatalysts differing in structure

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Embodiment 1

[0020] A different structure bismuth phosphate (BiPO 4 ) The preparation method of the photocatalyst is prepared by a hydrothermal method, and the steps are as follows:

[0021] 1) Under magnetic stirring conditions, 0.002molBi(NO 3 ) 3 ·5H 2 O was dissolved in 15ml of absolute ethanol, stirred for 20min to obtain solution A;

[0022] 2) Add 0.002molNa 2 HPO 4 12H 2 0 was dissolved in 15ml of absolute ethanol, and stirred to obtain solution B;

[0023] 3) Add solution B dropwise to solution A under magnetic stirring, and continue magnetic stirring for 30 minutes after the dropwise addition to obtain a precursor solution;

[0024] 4) Transfer the above precursor solution to a stainless steel reactor lined with polytetrafluoroethylene, the filling volume of the precursor solution is 80%, the water heating temperature is 180°C, and the water heating time is 6 hours;

[0025] 5) After the reaction, cool to room temperature, wash repeatedly with deionized water and absolute...

Embodiment 2

[0027] A different structure bismuth phosphate (BiPO 4 ) The preparation method of the photocatalyst is prepared by a hydrothermal method, and the steps are as follows:

[0028] 1) Prepare 100ml of phosphoric acid solution with pH=1 as solvent;

[0029] 2) Under magnetic stirring conditions, 0.002molBi(NO 3 ) 3 ·5H 2 O was dissolved in 15ml of prepared phosphoric acid solution, stirred for 20min to obtain solution A;

[0030] 3) Add 0.002molNa 2 HPO 4 12H 2 0 was dissolved in 15ml of prepared phosphoric acid solution, and stirred to obtain solution B;

[0031] 4) Under magnetic stirring, add solution B dropwise to solution A, and continue magnetic stirring for 30 minutes after the dropwise addition to obtain a precursor solution;

[0032] 5) Transfer the above precursor solution to a stainless steel reactor lined with polytetrafluoroethylene, the filling volume of the precursor solution is 80%, the water heating temperature is 180°C, and the water heating time is 24 ho...

Embodiment 3

[0035] A different structure bismuth phosphate (BiPO 4 ) The preparation method of the photocatalyst is prepared by a hydrothermal method, and the steps are as follows:

[0036] 1) Under magnetic stirring conditions, 0.002molBi(NO 3 ) 3 ·5H 2 O was dissolved in 15ml polyethylene glycol and stirred for 20min to obtain solution A;

[0037] 2) Add 0.002molNa 2 HPO 4 12H 2 0 was dissolved in 15ml polyethylene glycol, and stirred to obtain solution B;

[0038] 3) Add solution B dropwise to solution A under magnetic stirring, and continue magnetic stirring for 30 minutes after the dropwise addition to obtain a precursor solution;

[0039] 4) Transfer the above precursor solution to a stainless steel reactor lined with polytetrafluoroethylene, the filling volume of the precursor solution is 80%, the water heating temperature is 180°C, and the water heating time is 6 hours;

[0040] 5) After the reaction, cool down to room temperature, wash repeatedly with deionized water and ...

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Abstract

The invention discloses a preparation method of bismuth phosphate (BiPO4) photocatalysts differing in structure, and adopts a hydrothermal method. The preparation method comprises the following steps of: 1) dissolving Bi(NO3)3.5H2O in a solvent to obtain a solution A; 2) dissolving Na2HPO4.12H2O in a solvent to obtain a solution B; 3) dropwise adding the solution B in the solution A to obtain a precursor solution; 4) transferring the precursor solution into a stainless steel reaction kettle, wherein hydrothermal temperature is 180 DEG C and reaction duration is 6-24hours; and 5) after the reaction, cooling to normal temperature, repeatedly cleaning and centrifuging through de-ionized water and anhydrous ethanol, and air-drying under a natural condition to obtain the target product. The preparation method disclosed by the invention has the advantages that the preparation method is simple in process, moderate in reaction condition, low in cost and high in crystallizing degree of the prepared product; and through different solvents, the prepared BiPO4 photocatalysts are different in structure with remarkable difference, easy to distinguish, and provide a material basis for widening application field.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, in particular to a bismuth phosphate (BiPO 4 ) Preparation method of photocatalyst. Background technique [0002] Environmental pollution is one of the important challenges facing the world today, and solving this problem is of great significance to my country's implementation of sustainable development and the construction of a socialist harmonious society. Photocatalytic technology is a pollution treatment technology developed in recent decades. It has the advantages of low energy consumption, mild reaction conditions, and less secondary pollution, so it has attracted widespread attention. [0003] In recent years, people have begun to explore more efficient nanomaterials, and the shortcomings of original materials such as low light utilization efficiency and high electron-hole recombination efficiency due to photocatalysts have been improved. In the process of photocatalysis research...

Claims

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Application Information

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IPC IPC(8): B01J27/186C01B25/37
Inventor 李田鞠广凯范鈞閎李珵刘璐
Owner NANKAI UNIV
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