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A kind of γ-bismuth molybdate nanochip and preparation method thereof

A nano-chip, bismuth molybdate technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem that it is difficult to control the shape and particle size of γ-bismuth molybdate material, and the purity of γ-bismuth molybdate is not high. High, not suitable for photocatalysts and other issues, to achieve the effect of excellent visible light photocatalytic performance, unique and novel process, and controllable grain size

Active Publication Date: 2018-03-20
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] γ-bismuth molybdate is usually prepared by solid phase reaction method, co-precipitation method, sol-gel method and hydrothermal method, among which the preparation of solid-phase method, co-precipitation method and sol-gel method usually requires 400-700℃ High-temperature heat treatment under high temperature conditions to obtain crystalline materials; the γ-bismuth molybdate material prepared by heat treatment is difficult to control its morphology and particle size, and is not suitable for photocatalysts
The hydrothermal synthesis has the advantages of low crystallization temperature, controllable nanocrystalline grain shape and size, and is currently the main method for the synthesis of nano-γ-bismuth molybdate. Since bismuth molybdate has multiple α, β, and γ crystal phases, Usually, the hydrothermal synthesis using sodium molybdate and bismuth nitrate inorganic salt as raw materials is prone to impurity phases, and the purity of the obtained product γ-bismuth molybdate is not high

Method used

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  • A kind of γ-bismuth molybdate nanochip and preparation method thereof
  • A kind of γ-bismuth molybdate nanochip and preparation method thereof

Examples

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Embodiment 1

[0027] A preparation method for gamma-bismuth molybdate nanochips, comprising the following steps:

[0028] 1) Dissolve 10mmol of bismuth nitrate and 30mmol of 1-3 propylene glycol in 500ml of isopropanol, stir evenly to obtain a clear solution, transfer the solution to an autoclave with a volume of 1L, raise the temperature to 160°C for 6 hours, and stop heating After the reactor is cooled to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry at 80°C for 12 hours to obtain 1-3 propanediol bismuth powder;

[0029] 2) Get 10mmol sodium molybdate and dissolve it in 100ml deionized water to prepare an aqueous solution of sodium molybdate, then add 9mmol of 1-3 propanediol bismuth to it, vigorously stir to disperse the 1-3 propanediol bismuth evenly, then transfer the mixed solution to a volume of In a 200ml autoclave, adjust the pH value of the obtained solution system to between 0-1, then raise the temperature to 180°C and keep it warm for 12...

Embodiment 2

[0032] A preparation method for gamma-bismuth molybdate nanochips, comprising the following steps:

[0033] 1) Dissolve 10mol bismuth nitrate and 15mol 1-3 propanediol in 100L isopropanol, stir evenly to obtain a clear solution, transfer the solution to an autoclave with a volume of 200L, raise the temperature to 160°C for 12 hours, and stop heating After the reactor is cooled to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry at 80°C for 12 hours to obtain 1-3 propanediol bismuth powder;

[0034] 2) Get 10mol sodium molybdate and dissolve it in 20L deionized water to prepare an aqueous solution of sodium molybdate, then add 10mol of 1-3 propylene glycol bismuth to it, and vigorously stir to disperse the 1-3 propylene glycol bismuth evenly, then transfer the mixed solution to a volume of In a 20L autoclave, adjust the pH value of the obtained solution system to between 2-3, then raise the temperature to 180°C and keep it warm for 24 hour...

Embodiment 3

[0037] A preparation method for gamma-bismuth molybdate nanochips, comprising the following steps:

[0038] 1) Dissolve 100mmol of bismuth nitrate and 200mmol of 1-3 propylene glycol in 2.5L of isopropanol, stir evenly to obtain a clear solution, transfer the solution to an autoclave with a volume of 4L, heat up to 160°C and keep it warm for 3 hours, then stop After heating, cool the reactor to room temperature, filter and wash the filter cake with isopropanol for 3 times, and dry at 80°C for 12 hours to obtain 1-3 propanediol bismuth powder;

[0039] 2) Get 100mmol sodium molybdate and dissolve it in 100ml deionized water to prepare an aqueous solution of sodium molybdate, then add 110mmol of 1-3 propylene glycol bismuth to it, and vigorously stir to disperse the 1-3 propylene glycol bismuth evenly, then transfer the mixed solution to a volume of In a 200ml autoclave, adjust the pH value of the resulting solution system to between 1-2, then raise the temperature to 180°C and ...

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Abstract

The invention discloses a preparation method of gamma-bismuth molybdate nano nanosheets. The preparation method comprises the following steps: 1) carrying out solvothermal reaction on bismuth nitrate and 1,3-propanediol by using isopropanol as a solvent, filtering, washing and drying to obtain 1,3-propanediol bismuth; and 2) uniformly dispersing the obtained 1,3-propanediol bismuth in a sodium molybdate water solution, regulating the pH value of the obtained solution system to 0-3, carrying out hydrothermal reaction, filtering, washing and drying to obtain the gamma-bismuth molybdate nano nanosheets. The gamma-bismuth molybdate nano nanosheets are prepared from the main raw materials bismuth nitrate, isopropanol and sodium molybdate by the two-step process. The preparation method has the advantages of simple preparation technique and equipment, mild reaction conditions, low energy consumption and unique and novel technique. The prepared gamma-bismuth molybdate nano nanosheets have the advantages of high purity, large specific area, controllable grain size and excellent visible-light photocatalytic properties.

Description

technical field [0001] The invention belongs to the field of new environmental protection materials, and in particular relates to a gamma-bismuth molybdate nanochip and a preparation method thereof. Background technique [0002] Environmental protection and sustainable development have become important issues that human beings must consider. As a branch of green chemistry, photocatalytic technology is an emerging research field developed in recent years. Traditional TiO 2 Photocatalyst, with wide band gap, mainly absorbs ultraviolet light, can only use ultraviolet light in sunlight, and has a low utilization rate of sunlight. The development of new nanomaterials that can utilize visible light photocatalysis as a photocatalyst with high catalytic activity and can fully utilize sunlight is one of the most promising methods for controlling environmental pollution. Therefore, the development and design of new semiconductor photocatalysts with high efficiency, stability and vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00B82Y30/00B82Y40/00
CPCC01G39/00C01P2004/64C01P2006/12
Inventor 林志东孟柱洪玉元付萍王学华
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV