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Preparation method of bismuth molybdate nano-wafer

A technology of nano-chips and bismuth molybdate, which is applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as separation difficulties, reduction of photocatalytic activity of photocatalytic materials, particle agglomeration, etc., and achieve simple preparation and high specific surface area. Large, low temperature effect

Active Publication Date: 2016-06-29
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the nanoparticle photocatalytic material is directly applied in the liquid phase suspension system, its separation is difficult, and it leads to particle agglomeration, thereby reducing the photocatalytic activity of the photocatalytic material

Method used

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  • Preparation method of bismuth molybdate nano-wafer
  • Preparation method of bismuth molybdate nano-wafer
  • Preparation method of bismuth molybdate nano-wafer

Examples

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Embodiment 1

[0020] 1) Dissolve 10 mmol of bismuth nitrate and 30 mmol of glycerin in 4 mol (305 mL) of isopropanol, stir evenly to obtain a clear liquid, transfer the solution to an autoclave with a volume of 500 mL, heat up to 160°C and keep it warm for 6 hours. After stopping the heating, wait for the reactor to cool down to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry the filter cake at 80°C for 12 hours to obtain bismuth glycerol powder;

[0021] 2) Take 10mmol of ammonium heptamolybdate and dissolve it in 100ml of deionized water, then add 68mmol of bismuth glycerol to the above deionized aqueous solution, stir vigorously to disperse the bismuth glycerol evenly, adjust the pH value to between 1-2, and then mix the mixture Transfer to an autoclave with a volume of 200ml, raise the temperature to 180°C and keep it warm for 12 hours. After stopping the heating, wait for the reaction kettle to cool down to room temperature, filter and wash the f...

Embodiment 2

[0023] 1) Dissolve 10 mol of bismuth nitrate and 15 mol of glycerin in 1000 mol (76.4 L) of isopropanol, stir evenly to obtain a clear solution, transfer the solution to an autoclave with a volume of 100 L, heat up to 160°C and keep it warm for 12 hours. After stopping the heating, wait for the reactor to cool down to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry the filter cake at 80°C for 12 hours to obtain bismuth glycerol powder;

[0024] 2) Dissolve 10 mol of ammonium heptamolybdate in 20 liters of deionized water, then add 70 mol of bismuth glycerol to the above deionized aqueous solution, vigorously stir to disperse the bismuth glycerol evenly, adjust the pH value to between 0-1, and then mix the mixture Transfer to an autoclave with a volume of 25 liters, raise the temperature to 180° C. and keep it warm for 24 hours. After stopping the heating, wait for the reaction kettle to cool down to room temperature, filter and wash the ...

Embodiment 3

[0026] 1) Dissolve 100 mmol of bismuth nitrate and 20 mmol of glycerin in 32 mol (2.5 L) of isopropanol, stir evenly to obtain a clear solution, transfer the solution to an autoclave with a volume of 4 liters, heat up to 160° C. and keep it warm for 3 hours. After stopping the heating, wait for the reactor to cool down to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry the filter cake at 80°C for 12 hours to obtain bismuth glycerol powder;

[0027] 2) Dissolve 100mmol) of ammonium heptamolybdate in 100ml of deionized water, then add 720mmol of bismuth glycerol to the above deionized aqueous solution, stir vigorously to disperse the bismuth glycerol evenly, adjust the pH value to between 1-2, and then mix The liquid was transferred to an autoclave with a volume of 200 ml, and the temperature was raised to 180° C. and kept for 24 hours. After stopping the heating, wait for the reaction kettle to cool down to room temperature, filter and wa...

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Abstract

The invention relates to a preparation method of a bismuth molybdate nano-wafer and belongs to the field of new environment-friendly materials. The preparation method comprises the following steps: S1, in isopropanol solution, thermally reacting bismuth nitrate and glycerol mixed liquid solvent to produce glycerol bismuth; S2, evenly dispersing the glycerol bismuth in ammonium heptamolybdate ((NH4)6Mo7O24.4H2O) solution, and hydrothermally reacting to obtain the bismuth molybdate nano-wafer. Compared with the prior art, the preparation method has the advantages that the prepared bismuth molybdate is a micro-nano structural material 3-10 micrometers in micro-nano size, having large specific surface area, is filterable and recyclable in a solution system, is simple to prepare, has low temperature, needs low energy consumption and is directly useful as a visible light catalyst.

Description

technical field [0001] The invention relates to a preparation method of a micro-nano structure bismuth molybdate visible light photocatalyst, which belongs to the field of new environmental protection materials. Background technique [0002] Photocatalytic technology is considered to be an ideal environmental treatment technology and the most promising means to control environmental pollution, especially the treatment technology of visible light photocatalytic degradation of pollutants, which uses natural sunlight without consuming additional energy. Photocatalysts are generally nanomaterials, and the biggest problem in practical applications is the immobilization of nanomaterials. When preparing nano-catalyst materials, it is hoped to reduce the particle size and increase the specific surface area to obtain better photocatalytic activity; however, in the use of small nano-particles in an open heterogeneous reaction system, the recovery and reuse of catalysts has become an i...

Claims

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Application Information

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IPC IPC(8): B01J23/31C01G39/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G39/00B01J23/31C01P2002/72C01P2004/64C01P2006/12B01J35/40B01J35/39
Inventor 付萍王子颖刘雨奇
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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