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Micro-nano structure bismuth oxide material and preparation method thereof

A micro-nano structure, bismuth oxide technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve the problems of no adsorption effect, unobtainable preparation methods, etc. Simple preparation method, fast effect

Inactive Publication Date: 2015-11-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, no matter be product, or its preparation method, all there is weak point, at first, product is only to iodide ion (I - ) has higher adsorption capacity, and the maximum adsorption capacity can reach 182.9mg / g, while the iodate ion (IO 3- ) but no adsorption effect; secondly, the preparation method can not obtain both for I - And to IO 3- products with adsorption capacity

Method used

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  • Micro-nano structure bismuth oxide material and preparation method thereof
  • Micro-nano structure bismuth oxide material and preparation method thereof
  • Micro-nano structure bismuth oxide material and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0032] The concrete steps of preparation are:

[0033] In step 1, an organic solvent is first prepared according to the volume ratio of ethanol to ethylene glycol of 1.8:1. Then dissolve the soluble bismuth salt in an organic solvent to obtain a 0.02 mol / L soluble bismuth salt solution; wherein, the soluble bismuth salt is bismuth nitrate pentahydrate.

[0034] In step 2, first place the soluble bismuth salt solution at 150° C. for a closed reaction for 14 hours to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotation speed is 8000r / min, and the time is 6min, and the washing process is to use deionized water to separate the solid matter Carry out cleaning, and drying treatment is to place the solid after cleaning to dry at 50 ℃, and the preparation is similar to figure 1 and figure 2 shown, and as image 3 The micro-nanostr...

Embodiment 2

[0036] The concrete steps of preparation are:

[0037] In step 1, an organic solvent is first prepared according to the volume ratio of ethanol to ethylene glycol of 1.9:1. Then dissolve the soluble bismuth salt in an organic solvent to obtain a 0.03 mol / L soluble bismuth salt solution; wherein, the soluble bismuth salt is bismuth nitrate pentahydrate.

[0038] Step 2, first place the soluble bismuth salt solution at 155° C. for 13 hours in a closed reaction to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotation speed is 8500r / min, and the time is 5min, and the washing process is to use deionized water to separate the solid matter Carry out cleaning, and drying process is to place the solid after cleaning to dry at 55 ℃, and make a product similar to figure 1 and figure 2 shown, and as image 3 The micro-nanostructure bis...

Embodiment 3

[0040] The concrete steps of preparation are:

[0041] Step 1, first prepare an organic solvent according to the ratio of ethanol to ethylene glycol volume ratio of 2:1. Then dissolve the soluble bismuth salt in an organic solvent to obtain a 0.04 mol / L soluble bismuth salt solution; wherein, the soluble bismuth salt is bismuth nitrate pentahydrate.

[0042] Step 2, first place the soluble bismuth salt solution at 160° C. for 12 hours in a closed reaction to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotation speed is 9000r / min, and the time is 4min, and the washing process is to use deionized water to separate the solid matter Carry out cleaning, drying process is to place the solid matter after cleaning to dry at 60 ℃, make such as: figure 1 and figure 2 shown, and as image 3 The micro-nanostructure bismuth oxide mater...

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Abstract

The invention discloses a micro-nano structure bismuth oxide material and a preparation method thereof. The component of the material is non-stoichiometric bismuth oxide with a molecular formula of Bi2O2.33, and the material is in a tremella shape formed by vertical cross-linking of non-stoichiometric bismuth oxide nanosheets. The specific surface area of the tremella shaped non-stoichiometric bismuth oxide is larger than or equal to 26.6m<2> / g, and the nanosheets composing the tremella shaped non-stoichiometric bismuth oxide have a thickness of 5-10nm and a height of 2-5 micrometers. The preparation method includes: firstly using ethanol and ethylene glycol to prepare an organic solvent, then dissolving a soluble bismuth salt in the organic solvent to obtain a soluble bismuth salt solution, then subjecting the soluble bismuth salt solution to sealed reaction to obtain a reaction solution, and then carrying out solid-liquid separation, washing and drying treatment on the reaction solution in order, thus obtaining the target product. The micro-nano structure bismuth oxide material has adsorption capacity to I<-> and IO<3-> ions, and can be widely applied to high performance adsorption of radioactive iodine in water environment.

Description

technical field [0001] The invention relates to a bismuth oxide material and a preparation method thereof, in particular to a bismuth oxide material with a micro-nano structure and a preparation method thereof. Background technique [0002] As one of the first-order products of nuclear fission chain reaction, radioactive iodine mainly includes long-half-life iodine-129 (half-life is 1.57×107 years) and short-half-life iodine-131 (half-life is 8.05 days). In the event of an accident in a nuclear power reactor, radioactive iodine dissolves rapidly in water, forming large amounts of 131 I - and 129 I - , once it enters the human body, it will accumulate in the thyroid gland and eventually lead to the occurrence of cancer. [0003] Due to the low concentration of radioactive iodide ions in the water environment and the presence of a large number of high-concentration interfering ions, such as chloride ions, sulfate ions, and phosphate ions, it is difficult to selectively rem...

Claims

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Application Information

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IPC IPC(8): C01G29/00C02F1/28C02F1/58B82Y30/00
Inventor 刘盛文蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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