Method used for preparing subsize bismuth subcarbonate via hydrothermal method

A technology of bismuth oxycarbonate and bismuth oxycarbonate wafers, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of different particle sizes, high cost, expensive raw materials, etc., and achieve simple process flow and low cost Low, cheap effect

Inactive Publication Date: 2015-11-04
燕园众欣纳米科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Most of the existing bismuth oxycarbonate materials are prepared by using bismuth citrate as the bismuth source and organic solvents as the solvent. The raw materials used are expensive, the cost is high, the particle size is different, easy to agglomerate, and the dispersion is poor
Although some technical breakthroughs have been made in the preparation of bismuth oxycarbonate by the hydrothermal method, due to the imperfection of the existing preparation process and parameter settings, the prepared crystals are still large in size and uneven in size.

Method used

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  • Method used for preparing subsize bismuth subcarbonate via hydrothermal method
  • Method used for preparing subsize bismuth subcarbonate via hydrothermal method
  • Method used for preparing subsize bismuth subcarbonate via hydrothermal method

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Embodiment 1

[0050] The preparation method of bismuth oxycarbonate nanoscale chip of the present invention, comprises the following steps:

[0051] 1) Add 1mmol and 3mmol into 15ml deionized water at room temperature, stir well to form bismuth oxycarbonate crystal nuclei;

[0052] 2) Transfer the above suspension to a 20mL polytetrafluoroethylene hydrothermal reaction kettle, and react at a constant temperature of 160°C for 18 hours;

[0053] 3) Stop heating and cool down to room temperature naturally;

[0054] 4) Pour off the supernatant of the reaction kettle, and collect the turbid liquid and the precipitation in the lower layer. Add 40mL of deionized water, 1kW ultrasonic oscillation for 5 minutes, then centrifuge at 10,000 rpm for 5 minutes, pour off the supernatant, add ethanol, ultrasonic oscillation for 5 minutes, and continue centrifugation under the same conditions. Repeat the above steps twice to remove impurities;

[0055] 5) drying the cleaned bismuth oxycarbonate wafer in ...

Embodiment 2

[0058] The preparation method of bismuth oxycarbonate nanoscale chip of the present invention, comprises the following steps:

[0059] 1) Add 1mmol and 6mmol into 15ml deionized water at room temperature, stir well to form bismuth oxycarbonate crystal nuclei;

[0060] 2) Add 0.04g of trisodium citrate into the above-mentioned turbid liquid containing bismuth oxycarbonate crystal nuclei, and stir evenly;

[0061] 3) Transfer the above suspension to a 20mL polytetrafluoroethylene hydrothermal reaction kettle, and react at a constant temperature of 160°C for 24 hours;

[0062] 4) Stop heating and cool down to room temperature naturally;

[0063] 5) Pour off the supernatant of the reaction kettle, and collect the turbid liquid and precipitation in the lower layer. Add 40mL of deionized water, 1kW ultrasonic oscillation for 5 minutes, then centrifuge at 10,000 rpm for 5 minutes, pour off the supernatant, add ethanol, ultrasonic oscillation for 5 minutes, and continue centrifugati...

Embodiment 3

[0067] The preparation method of bismuth oxycarbonate micron wafer of the present invention, comprises the following steps:

[0068] 1) Add 0.010mol and 0.035mol into 160ml deionized water at room temperature, and stir thoroughly;

[0069] 2) Transfer the above suspension to a 200mL polytetrafluoroethylene hydrothermal reaction kettle, and react at a constant temperature of 190°C for 36 hours;

[0070] 3) Stop heating and cool down to room temperature naturally;

[0071] 4) Pour off the supernatant of the hydrothermal reaction kettle, filter the turbid liquid and the precipitate in the lower layer, and then wash the precipitate with deionized water and absolute ethanol for 3 times to remove possible impurities;

[0072] 5) drying the cleaned bismuth oxycarbonate wafer in a constant temperature drying oven at 80° C. for 24 hours to obtain a powdery high-purity nano-scale bismuth oxycarbonate wafer.

[0073] The test results show that the purity of the generated bismuth oxycar...

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Abstract

The invention discloses a method used for preparing subsize bismuth subcarbonate crystal sheets via hydrothermal method. The method comprises following steps: a bismuth salt and a carbonate/bicarbonate are dissolved in water at a certain ratio so as to obtain bismuth subcarbonate crystal nucleus, wherein a template can be added optionally; an obtained mixture is delivered into a hydrothermal reaction vessel, and is reacted for a certain period of time at a certain temperature so as to obtain bismuth subcarbonate crystal sheets; the bismuth subcarbonate crystal sheets are cooled, and are subjected to impurity removing and drying so as to obtain powdery high-purity size-controllable bismuth subcarbonate crystal sheets. The process flow is simple; cost is relatively low; nano-grade and micron-grade bismuth subcarbonate crystals with different size and morphology can be prepared via controlling reaction temperature and time; the method possesses commercial exploitation value; the prepared bismuth subcarbonate can be applied to the field of medicine, or can be taken as a photocatalyst in organic pollutant degradation, and can also be taken as an analysis reagent, a pearlescent plastic additive, a cosmetic adhesive agent, and an enamel fluxing agent.

Description

technical field [0001] The invention relates to the preparation of bismuth oxycarbonate crystals, in particular to a method for preparing small-sized bismuth oxycarbonate by a hydrothermal method. Background technique [0002] Bismuth (Bismuth) atomic number 83, once considered to be the most stable element with the largest mass, has unique physical and chemical properties. Unlike other heavy metals, bismuth has low toxicity, is not easily absorbed by the human body, does not cause cancer, does not damage DNA structure, and can be taken out of the body through urination, so it has important applications in chemical, pharmaceutical, semiconductor, catalyst and other fields. [0003] Bismuth oxycarbonate (Bi 2 o 2 CO 3 ), also known as bismuth subcarbonate, bismuth subcarbonate, usually white or yellowish powder. Because it can slightly neutralize gastric acid, absorb intestinal toxins, bacteria, and viruses, form a thin protective film on the wound surface of gastrointest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10C30B29/10B82Y40/00
Inventor 张扬威田幼华孙彬
Owner 燕园众欣纳米科技(北京)有限公司
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