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A homogeneous yolk-shell structure bi 2 moo 6 Microsphere and its preparation method and application

A technology of shell structure and egg yolk, which is applied in the field of homogeneous yolk-shell structure Bi2MoO6 microspheres and its preparation, can solve the complicated and cumbersome preparation method of egg yolk-shell structure, few reports of homogeneous egg yolk-shell materials, and no homogeneity Egg yolk-shell structure and other problems, to achieve excellent visible light catalytic activity, easy industrial scale application, simple preparation method

Inactive Publication Date: 2016-11-23
SHANGHAI NANOTECH PROMOTION CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research focuses on the preparation and application of heterogeneous yolk-shell nanomaterials, and the preparation and application of homogeneous yolk-shell materials are rarely reported.
In particular, no homogeneous yolk-shell structure Bi 2 MoO 6 Related reports about microspheres
[0005] In addition, the current preparation methods of egg yolk-shell structure are very complex and cumbersome, with many steps
For example, the selective etching method, template method, shipbuilding method in a bottle, Ostwald ripening, and current displacement reaction for preparing egg yolk-shell materials have certain limitations, such as difficult preparation, cumbersome process, and high requirements. The reaction temperature, using soft and hard templates or toxic solvents, is only suitable for specific metals or semiconductors, etc.

Method used

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  • A homogeneous yolk-shell structure bi <sub>2</sub> moo <sub>6</sub> Microsphere and its preparation method and application
  • A homogeneous yolk-shell structure bi <sub>2</sub> moo <sub>6</sub> Microsphere and its preparation method and application
  • A homogeneous yolk-shell structure bi <sub>2</sub> moo <sub>6</sub> Microsphere and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0029] 1) Preparation of photocatalyst

[0030] Bi(NO 3 ) 3 and NaMoO 4 Soluble in ethylene glycol, Bi(NO 3 ) 3 The concentration is 0.1mol / L, NaMoO 4The concentration is 0.05mol / L, then add ethanol to the above ethylene glycol solution, so that the volume ratio of ethylene glycol and ethanol is 1:3, after mixing evenly, transfer it to a 100mL high-pressure hydrothermal kettle, and heat it at 160°C React for 12 hours. Then, the reaction product was centrifuged, washed and dried to obtain a sample, and then the sample was placed in a tube furnace, and in an air atmosphere, the temperature was raised to 300°C at a rate of 4°C / min, and heat treated for 1 hour to obtain a homogeneous egg yolk-shell Structure Bi 2 MoO 6 Microspheres.

[0031] figure 1 Homogeneous yolk-shell structure Bi prepared for 2 MoO 6 Scanning electron micrographs of microspheres. From figure 1 It can be seen that the prepared Bi 2 MoO 6 It is a homogeneous yolk-shell microsphere with an avera...

Embodiment 2

[0038] BiCl 3 and (NH 4 ) 2 Mo 2 o 7 Soluble in ethanol, BiCl 3 The concentration is 0.05mol / L, (NH 4 ) 2 Mo 2 o 7 The concentration is 0.025mol / L, then add propanol to the above ethanol solution, so that the volume ratio of ethylene glycol and propanol is 1:2, after mixing evenly, transfer to a 100mL high-pressure hydrothermal kettle, at 140 ℃ React for 12 hours. Then, the reaction product was centrifuged, washed and dried to obtain a sample, and then the obtained sample was placed in a tube furnace, and in an air atmosphere, the temperature was raised to 300°C at a rate of 2°C / min, and heat-treated for 2 hours to obtain homogeneous egg yolk - shell structure Bi 2 MoO 6 Microspheres.

[0039] Adopt the method described in embodiment 1 to test homogeneous egg yolk-shell structure Bi 2 MoO 6 Visible-light photocatalytic activity of microspheres towards Cr(VI). The homogeneous yolk-shell structure Bi 2 MoO 6 The relevant properties and visible light catalytic pe...

Embodiment 3

[0041] Bi 2 (SO 4 ) 3 and H 3 PO 4 12MoO 3 Soluble in toluene, Bi 2 (SO 4 ) 3 The concentration is 0.2mol / L, H 3 PO 4 12MoO 3 concentration of 0.1mol / L, and then add cyclohexane to the above-mentioned toluene solution, so that the volume ratio of toluene and cyclohexane is 1:0.5. The reaction was carried out for 12 hours. Then, the reaction product was centrifuged, washed and dried to obtain a sample, and then the obtained sample was placed in a tube furnace, and in an air atmosphere, the temperature was raised to 400°C at a rate of 3°C / min, and heat treated for 2 hours to obtain homogeneous egg yolk - shell structure Bi 2 MoO 6 Microspheres.

[0042] Adopt the method described in embodiment 1 to test homogeneous egg yolk-shell structure Bi 2 MoO 6 Visible-light catalytic activity of microspheres towards methylene blue. The homogeneous yolk-shell structure Bi 2 MoO 6 The relevant properties and visible light catalytic performance of the microspheres are show...

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Abstract

The invention discloses a homogeneous yolk-shell structure Bi2MoO6 microsphere as well as a preparation method and application thereof. The homogeneous yolk-shell structure Bi2MoO6 microsphere is a microsphere which takes Bi2MoO6 as a yolk-shell structure; a yolk is self-assembled by Bi2MoO6 nano particles and a shell is self-assembled by Bi2MoO6 nano sheets; and a cavity is formed between the yolk and the shell. The homogeneous yolk-shell structure Bi2MoO6 microsphere has excellent visible light catalytic activity, no pollution, no toxin and low cost. According to the homogeneous yolk-shell structure Bi2MoO6 microsphere, the preparation process is simple, the temperature is relatively low, the conditions are moderate, the operation is convenient, the cost is low and the industrial production is facilitated.

Description

technical field [0001] The invention belongs to the field of visible light catalytic materials, in particular to a homogeneous egg yolk-shell structure Bi 2 MoO 6 Microspheres and methods for their preparation. Background technique [0002] With the development of economy and industry, the problems of environmental pollution and energy shortage have become the biggest challenges faced by human beings. It is an urgent and urgent task to seek technologies that can effectively remove organic pollutants and heavy metal ions in water and air by using sunlight. The government and people attach great importance to it. Semiconductor photocatalysis technology is a new type of technology that emerged in the 1970s to effectively control environmental pollution and efficiently utilize solar energy. It has shown broad application prospects in the fields of water treatment, air purification and hydrogen production. The technology is easy to operate, has no secondary pollution, low ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31B01J35/08B01J13/02B82Y30/00B82Y40/00A62D3/17A62D101/28
Inventor 黎晋良刘心娟潘丽坤孙卓李萍张静宋志棠闵国全
Owner SHANGHAI NANOTECH PROMOTION CENT