A novel vanadium phosphate photocatalytic material and its preparation method and application

A photocatalytic material, vanadium phosphate technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low catalytic efficiency of vanadate photocatalysts, uneven particle size distribution, High equipment requirements, to achieve good photocatalytic activity, stable photocatalytic degradation performance, and environmental friendliness

Active Publication Date: 2018-12-11
SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among them, non-oxidized titanium vanadate photocatalysts that respond to visible light are more researched, such as Chinese patent document CN100488625C (application number 200710118065.6) discloses a bismuth vanadate BiVO prepared by microwave method 4 The method is to add cetyltrimethylammonium bromide during the synthesis process, place the bismuth vanadate precursor in a microwave oven, heat it at a microwave power of 119W to 280W for 10 to 40 minutes, then cool, wash and dry to obtain the finished product, but this method High requirements on equipment and low output; another example is Chinese patent document CN103157459A which discloses a visible light-responsive vanadate photocatalyst LiMVO 4 And preparation method thereof, the chemical composition general formula of this vanadate photocatalyst is LiMVO 4 , where M is one of Mg, Zn and Co, but the catalytic efficiency of this vanadate photocatalyst is not high; 3 TiV 4 o 15 It has the effect of decomposing harmful chemical substances under visible light irradiation, but there is a problem of uneven particle size distribution

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  • A novel vanadium phosphate photocatalytic material and its preparation method and application
  • A novel vanadium phosphate photocatalytic material and its preparation method and application
  • A novel vanadium phosphate photocatalytic material and its preparation method and application

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Embodiment 1

[0038] Preparation of Vanadium Phosphate Ba by Solid Phase Synthesis 2 BiV 2 PO 11 Photocatalytic materials and their applications

[0039] The steps are as follows:

[0040] (1) According to the chemical formula Ba 2 BiV 2 PO 11 The stoichiometric ratio of each element in the formula is weighed separately from barium carbonate BaCO 3 : 1.973 g, bismuth oxide Bi 2 o 3 : 1.165 g, vanadium pentoxide V 2 o 5 : 0.910 g, ammonium dihydrogen phosphate NH 4 h 2 PO 4 : 0.575 grams, ground in an agate mortar and mixed well;

[0041] (2) Take the mixture of the above step (1), select the air atmosphere for pre-calcination, the calcination temperature is 350 ° C, the calcination time is 10 hours, then cool to room temperature, and take out the sample;

[0042] (3) Fully mix and grind the pre-calcined raw materials again, carry out the second calcination in the air atmosphere, the calcination temperature is 750°C, and the calcination time is 7 hours, then automatically lower...

Embodiment 2

[0050] Preparation of Vanadium Phosphate Ba by Solid Phase Synthesis 2 BiV 2 PO 11 Photocatalytic materials and their applications

[0051] The steps are as follows:

[0052] (1) According to the chemical formula Ba 2 BiV 2 PO 11 The stoichiometric ratio of each element in the formula, weighed barium oxide BaO: 1.533 grams, bismuth subcarbonate (BiO) 2 CO 3 0.5H 2 O: 1.298 g, ammonium metavanadate NH 4 VO 3 : 1.170 g, phosphorus pentoxide P 2 o 5 : 0.355 grams, ground in an agate mortar and mixed well;

[0053] (2) Take the mixture of the above step (1), select the air atmosphere for pre-calcination, the calcination temperature is 500 ° C, the calcination time is 5 hours, then cool to room temperature, and take out the sample;

[0054] (3) Fully mix and grind the pre-calcined raw materials again, carry out the second calcination in the air atmosphere, the calcination temperature is 550°C, the calcination time is 12 hours, then cool to room temperature, take out th...

Embodiment 3

[0058] Preparation of Vanadium Phosphate Ba by Solid Phase Synthesis 2 BiV 2 PO 11 Photocatalytic materials and their applications

[0059] The steps are as follows:

[0060] (1) According to the chemical formula Ba 2 BiV 2 PO 11 The stoichiometric ratio of each element in the formula is weighed separately from barium carbonate BaCO 3 : 1.973 g, bismuth subcarbonate (BiO) 2 CO 3 0.5H 2 O: 1.298 g, ammonium metavanadate NH 4 VO 3 : 1.170 g, monoammonium phosphate NH 4 h 2 PO 4 : 0.575 grams, ground and mixed in an agate mortar;

[0061] (2) Take the mixture of the above step (1), select the air atmosphere for pre-calcination, the pre-calcination temperature is 450 ° C, the calcination time is 8 hours, then cool to room temperature, and take out the sample;

[0062] (3) Fully mix and grind the pre-calcined raw materials again, and perform a second calcination in an air atmosphere at a calcination temperature of 700°C for 9 hours, then cool to room temperature, tak...

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Abstract

The invention discloses a novel vanadium phosphate photocatalytic material as well as a preparation method and application thereof. The chemical composition formula of the vanadium phosphate photocatalytic material is Ba2BiV2PO11. According to the preparation method, the novel photocatalytic material is prepared by adopting a high-temperature solid-phase method and a wet-chemical method respectively. The preparation method has the advantages of simplicity and low cost, and the prepared photocatalytic material has the advantages of uniformity in particle distribution, good chemical stability and the like. Compared with a traditional photocatalyst TiO2, the novel material has narrower bandgap width (2.47 eV), has excellent catalytic performance, has an effect of decomposing harmful chemical substances under the irradiation of the visible light and has the advantages of good repeatability, good chemical stability and good application prospect.

Description

technical field [0001] The present invention relates to a kind of visible light responsive photocatalyst material Ba 2 BiV 2 PO 11 , especially related to the photocatalyst material Ba for the degradation of organic dye pollutants 2 BiV 2 PO 11 , belongs to the field of inorganic photocatalytic materials. Background technique [0002] After entering the 21st century, global environmental pollution and energy crisis have increasingly become the two key factors restricting the progress of human civilization, and the elimination of environmental pollutants needs to consume a lot of energy, which brings the increasingly severe energy crisis presented a formidable challenge. And solar energy is a kind of inexhaustible natural resource, in today's resource dwindling day by day, the development of solar energy is one of the methods of replacing traditional energy sources (such as oil, coal). Among them, semiconductor photocatalysts are environmentally friendly and can use su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198C02F1/30C02F101/30C02F103/30
CPCY02W10/37
Inventor 马忠谢洪德
Owner SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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