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Preparation method of bismuth oxycarbonate flower-like microsphere thermally synthesized by ethylene glycol-water mixed solvent

A technology of bismuth oxycarbonate flowers and mixed solvents, which is applied in the field of preparation of inorganic micro-nano materials, and achieves the effects of high product yield, simple preparation process and low cost

Inactive Publication Date: 2014-04-09
ZHANJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind does not add any surfactant or complexing agent or polymer, uses ethylene glycol and water as a mixed solvent, uses bismuth nitrate and urea as reactants, and uses a solvent method to synthesize a large number of uniform shapes and sizes in a short period of time. The method of bismuth oxycarbonate three-dimensional flower-like microspheres with hierarchical structure composed of nanosheets has not been reported publicly

Method used

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  • Preparation method of bismuth oxycarbonate flower-like microsphere thermally synthesized by ethylene glycol-water mixed solvent
  • Preparation method of bismuth oxycarbonate flower-like microsphere thermally synthesized by ethylene glycol-water mixed solvent
  • Preparation method of bismuth oxycarbonate flower-like microsphere thermally synthesized by ethylene glycol-water mixed solvent

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Embodiment 1

[0018] Mix 48ml of ethylene glycol and 12ml of deionized water evenly to form a mixed solvent, then add 2mmol of bismuth nitrate and 0.5g of urea successively under stirring, and stir until completely dissolved. The final solution was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reaction vessel. Put it in a dry box, and conduct a hydrothermal reaction at 180° C. for 12 hours. Then it was naturally cooled to room temperature, and the obtained precipitate was rinsed three times with deionized water and absolute ethanol, separated by centrifugation, and dried in a vacuum oven at 80° C. for 12 hours. Bismuth oxycarbonate flower-like microspheres can be obtained. The X-ray diffraction pattern of the bismuth oxycarbonate product is shown in figure 1 , the position and intensity of each diffraction peak in the figure are consistent with the standard diffraction card (JCPDS41-1488). Its scanning electron microscope picture is shown in figure 2 a, TEM imag...

Embodiment 2

[0020] Mix 48ml of ethylene glycol and 12ml of deionized water evenly to form a mixed solvent, then add 2mmol of bismuth nitrate and 0.5g of urea successively under stirring, and stir until completely dissolved. The final solution was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reaction vessel. Place it in a dry box, and conduct a hydrothermal reaction at 100° C. for 12 hours. Then it was naturally cooled to room temperature, and the obtained precipitate was rinsed three times with deionized water and absolute ethanol, separated by centrifugation, and dried in a vacuum oven at 80° C. for 12 hours. Bismuth oxycarbonate flower-like microspheres can be obtained. The scanning electron microscope picture of the bismuth oxycarbonate product is shown in image 3 a and 3b, show the bismuth oxycarbonate product as flower-like microspheres.

Embodiment 3

[0022] Mix 48ml of ethylene glycol and 12ml of deionized water evenly to form a mixed solvent, then add 2mmol of bismuth nitrate and 0.5g of urea successively under stirring, and stir until completely dissolved. The final solution was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reaction vessel. Place it in a dry box, and conduct a hydrothermal reaction at 180° C. for 6 hours. Then it was naturally cooled to room temperature, and the obtained precipitate was rinsed three times with deionized water and absolute ethanol, separated by centrifugation, and dried in a vacuum oven at 80° C. for 12 hours. Bismuth oxycarbonate flower-like microspheres can be obtained.

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Abstract

The invention discloses a preparation method of a bismuth oxycarbonate flower-like microsphere thermally synthesized by an ethylene glycol-water mixed solvent, belonging to the technical field of preparation of inorganic micro-nano materials. The preparation method comprises the following steps: mixing ethylene glycol and deionized water according to a certain volume to form a mixed solvent under stirring; dissolving a certain amount of bismuth nitrate and urea into the mixed solvent, transferring the reaction system into a stainless steel reaction kettle with a polytetrafluoroethylene lining, placing in a drying oven, and carrying out hydrothermal reaction for a certain time under a certain temperature; and naturally cooling to the room temperature, respectively rinsing the obtained precipitates by the deionized water and absolute ethyl alcohol, centrifuging and separating, and drying in the drying oven to obtain the bismuth oxycarbonate flower-like microsphere which consists of nano-sheets. The synthesis method disclosed by the invention has the advantages of being simple in process, low in cost, more uniform in product morphological structure and dimension, and capable of synthesizing largely. The bismuth oxycarbonate flower-like microsphere synthesized by the method disclosed by the invention has an average diameter of 2 mu m-6 mu m; and the product is expected to be widely applied in the photocatalysis field.

Description

technical field [0001] The invention relates to the preparation of a micro-nano material, in particular to a method for preparing bismuth oxycarbonate flower-like microspheres thermally synthesized by an ethylene glycol-water mixed solvent, and belongs to the technical field of preparation of inorganic micro-nano materials. Background technique [0002] It is well known that the physical and chemical properties of inorganic nanomaterials are strongly dependent on their morphology, size, and microstructure due to the interrelationship between structure and properties. In recent years, inorganic micro-nano functional materials with controllable size and shape, especially with nanostructures as basic units (such as zero-dimensional nanoparticles, one-dimensional nanowires, nanorods and nanotubes, and two-dimensional nanoplates, nanosheets ) composed of micro-nano materials with a three-dimensional hierarchical structure have attracted great interest and attention because of the...

Claims

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Application Information

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IPC IPC(8): C01G29/00B01J27/232B82Y40/00
Inventor 马琳郭海燕徐旭耀许丽梅
Owner ZHANJIANG NORMAL UNIV
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