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Preparation method and use of yttrium-doped bismuth stannate nanocrystallines

A technology of bismuth stannate and nanocrystals is applied in the field of inorganic nano-semiconductor material synthesis, which can solve the problem of high cost and achieve the effects of low cost, convenient mass production and reduced energy consumption.

Inactive Publication Date: 2015-09-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional synthesis method is to use high temperature and high pressure method to prepare β-Bi 2 sn 2 o 7 , but the cost of its preparation is too high. In recent years, the hydrothermal method has been widely concerned as a simple, green and pollution-free synthetic method.

Method used

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  • Preparation method and use of yttrium-doped bismuth stannate nanocrystallines
  • Preparation method and use of yttrium-doped bismuth stannate nanocrystallines
  • Preparation method and use of yttrium-doped bismuth stannate nanocrystallines

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Experimental program
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Effect test

Embodiment 1

[0032] Take by weighing 1.94028g bismuth nitrate (Bi(NO 3 ) 3 ?5H 2 O) was dissolved in 10mL 1M dilute nitric acid to obtain mixed solution A; 1.13896g sodium stannate (Na 2 SnO 6 ?4H 2 O) Dissolve in 10ml double-distilled water to obtain an aqueous solution of sodium stannate, transfer the aqueous solution of sodium stannate into mixed solution A to obtain mixed solution B, adjust to pH=12 with NaOH solution. Transfer the mixed solution B with pH=12 into a 50mL polytetrafluoroethylene-lined reactor, and keep the temperature at 180°C for 24h. The product was alternately centrifuged and washed with water and ethanol, and dried in vacuum at 60° C. for 12 hours to obtain bismuth stannate nanocrystals.

[0033] Get 0.05g of the bismuth stannate nanocrystals prepared in this example and add them into a 100mL photocatalytic reactor containing 10mg / L tetracycline aqueous solution, and stir in the dark at room temperature for 30 minutes to reach adsorption-desorption equilibrium;...

Embodiment 2

[0035] Take by weighing 1.92087g bismuth nitrate (Bi(NO 3 ) 3 ?5H 2 O) and 0.00766g yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O) was dissolved in 10mL 1M dilute nitric acid to obtain mixed solution A; 1.12757g sodium stannate (Na 2 SnO 6 ?4H 2O) Dissolve in 10ml double distilled water to obtain an aqueous solution of sodium stannate, transfer the aqueous solution of sodium stannate into the above mixed solution A to obtain a mixed solution B, and ultrasonically stir the mixed solution B until it becomes a milky white mixed solution , adjusted to pH=12 with NaOH solution. Transfer the mixed solution with pH=12 into a 50mL polytetrafluoroethylene-lined reactor, and keep the temperature at 180°C for 24h. The product was alternately centrifuged and washed with water and ethanol, and dried in vacuum at 60° C. for 12 hours to obtain yttrium-doped bismuth stannate nanocrystals.

[0036] The yttrium-doped bismuth stannate nanocrystals prepared in this example were used for photocatal...

Embodiment 3

[0038] Take by weighing 1.88207g bismuth nitrate (Bi(NO 3 ) 3 ?5H 2 O) and 0.02298g yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O) was dissolved in 10mL 1M dilute nitric acid to obtain mixed solution A; 1.10479g sodium stannate (Na 2 SnO 6 ?4H 2 O) be dissolved in 10ml double-distilled water to obtain an aqueous solution of sodium stannate, transfer the aqueous solution of sodium stannate to mixed solution A to obtain mixed solution B, and ultrasonically stir mixed solution B until it becomes a milky white mixed solution, Adjust to pH=12 with NaOH solution. Transfer the mixed solution with pH=12 into a 50mL polytetrafluoroethylene-lined reactor, and keep the temperature at 180°C for 24h. The product was alternately centrifuged and washed with water and ethanol, and dried in vacuum at 60° C. for 12 hours to obtain yttrium-doped bismuth stannate nanocrystals.

[0039] The yttrium-doped bismuth stannate nanocrystals prepared in this example were used for photocatalytic degradation...

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Abstract

The invention provides a preparation method and use of yttrium-doped bismuth stannate nanocrystallines. A semi-conductor material can be used for visible-light degradation of organic pollutants and particularly can be used for visible-light degradation of tetracycline. The preparation method comprises the following steps: bismuth nitrate and yttrium nitrate are mixed in dilute nitric acid to be uniformly mixed, then a sodium stannate solution is added, ultrasonic treatment is conducted till a milk white mixed solution is obtained, the pH is adjusted with an NaOH solution, and finally the yttrium-doped bismuth stannate nanocrystallines are prepared by the one-step hydrothermal method. The yttrium-doped bismuth stannate nanocrystallines have the advantages of being stable in property, nontoxic and the like, the raw materials are low in price and easy to obtain, the cost is low, the environment-friendly requirement is satisfied, the reaction time is relatively short, accordingly, the energy consumption and the reaction cost are lowered, and volume production is facilitated; a yttrium-doped bismuth stannate nanocrystalline catalyst has relatively strong photocatalytic degradation ability, and can achieve the degradation effect of 80.0% when being used for photocatalytic degradation of tetracycline, thereby having a very high practical application value.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic nano-semiconductor materials, and specifically refers to a preparation method and application of yttrium-doped bismuth stannate nanocrystals. The semiconductor material can be used to degrade organic pollutants with visible light, especially tetracycline with visible light. Background technique [0002] With the frequent use of antibiotics in the pharmaceutical industry and animal husbandry, more and more water quality problems are caused. Tetracycline, as a kind of antibiotic, is widely used in medical treatment, and its harm to the environment is becoming more and more serious. Traditional physical adsorption cannot effectively treat such antibiotics, and chemical deposition will cause secondary pollution. Semiconductor catalyst is a new type of green and pollution-free material, but most common semiconductor catalysts only respond to ultraviolet light. Since ultraviolet light o...

Claims

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Application Information

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IPC IPC(8): B01J23/18C02F1/30
Inventor 施伟东吴苗苗王超陈超沈洪强余小强陈继斌
Owner JIANGSU UNIV
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