A kind of preparation method of strontium titanate/tin niobate composite nanomaterial

A technology of composite nanomaterials and composite materials, which is applied in the field of preparation of strontium titanate/tin niobate composite nanomaterials, to achieve the effects of improving stability, enhancing visible light hydrogen production activity, and increasing lifespan

Active Publication Date: 2020-02-21
平邑仁安中医药产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no one has reported the preparation of SrTiO by a two-step wet chemical method 3 / SnNb 2 o 6 Composite material, the SNO used is stable in chemical and physical properties, the raw material is cheap and easy to get, non-toxic, and SrTiO is prepared by using it as a carrier 3 / SnNb 2 o 6 The reaction process of the composite material is simple, and the resulting product has good photocatalytic hydrogen production activity, high stability, and the production process is green and environmentally friendly

Method used

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  • A kind of preparation method of strontium titanate/tin niobate composite nanomaterial
  • A kind of preparation method of strontium titanate/tin niobate composite nanomaterial
  • A kind of preparation method of strontium titanate/tin niobate composite nanomaterial

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1 SnNb 2 o 6 Preparation of nanosheets

[0034] SnNb 2 o 6 The preparation adopts the method of hydrothermal reaction: Weigh 0.5g of niobium pentoxide and 2.2443g of potassium hydroxide in a 50mL reactor lined with polytetrafluoroethylene, add 35mL of deionized water to it, and put the reactor Put it in an oven and react with water at 180°C for 48 hours. After naturally cooling to room temperature, a clear precursor solution is obtained. Transfer the solution to a 50mL beaker, adjust the pH of the solution to 8 with a concentration of 2mol / L dilute hydrochloric acid, and then add 0.4245g Stannous chloride dihydrate, stirred by magnetic force for 10min, adjusted the pH of the solution to 2 with dilute hydrochloric acid with a concentration of 2mol / L again, transferred the solution to a 100mL reaction kettle lined with polytetrafluoroethylene, put it into an oven, and heated it with water at 200℃. Thermally react for 48 hours, cool to room temperature, centrif...

Embodiment 2

[0035] Example 2 SrTiO 3 Preparation of nanoparticles

[0036] SrTiO 3 The preparation adopts the method of hydrothermal reaction: Measure 10mmol of tetrabutyl titanate and dissolve it in 20ml of ethylene glycol, stir it magnetically for 10min to form a clear solution, then add 20ml of 0.5M strontium nitrate solution and 10ml of 5M sodium hydroxide solution, magnetic Stir for 30 minutes, transfer the solution to a 100mL reaction kettle lined with polytetrafluoroethylene, put it in an oven, conduct a hydrothermal reaction at 200°C for 24 hours, cool to room temperature, centrifuge to obtain white particles, wash with water and alcohol until neutral, and centrifuge. Dry in an oven at 60°C for 12h.

Embodiment 3

[0037] Example 3 10%-SrTiO 3 / SnNb 2 o 6 Preparation of composite materials

[0038] SrTiO 3 / SnNb 2 o 6 The preparation of the composite material adopts a two-step wet chemical method: weigh 50mg SnNb 2 o 6 Dissolve in 60ml absolute ethanol, 5.6mg SrTiO 3 The powder was dissolved in 20ml of absolute ethanol, and then ultrasonicated in an ultrasonic machine with a power of 250W for 30min, and then the SrTiO 3 The solution was added dropwise to SnNb 2 o 6 The solution was magnetically stirred for 4 hours, and the solution was transferred to a 100mL reaction kettle lined with polytetrafluoroethylene, put into an oven, and subjected to hydrothermal reaction at 160°C for 12 hours. After cooling to room temperature naturally, the yellow particles were centrifuged, washed with water and After washing with alcohol three times, centrifuge and dry in an oven at 60°C for 12 hours to obtain the 10%-SrTiO 3 / SnNb 2 o 6 composite material.

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Abstract

Based on the problem of low visible light catalytic efficiency of single strontium titanate nanoparticle, the invention provides a strontium titanate / tin niobate composite nanometer material preparation method, which comprises: respectively weighing SnNb2O6 powder and SrTiO3 powder in absolute alcohol, carrying out ultrasonic dispersion, adding the SrTiO3 solution into the SnNb2O6 solution in a dropwise manner, carrying out magnetic stirring, transferring the obtained solution into a reaction kettle with a polytetrafluoroethylene lining, placing into an oven, carrying out a hydrothermal reaction, naturally cooling to a room temperature, carrying out centrifugation to obtain light yellow particles, carrying out water washing and alcohol washing, carrying out centrifugation, and drying to obtain the SrTiO3 / SnNb2O6 composite material, wherein the granular SrTiO3 is dispersed on the SNO nano-sheet. According to the present invention, the preparation process is simple, and the prepared strontium titanate / tin niobate composite nanometer material has good photocatalytic hydrogen production activity.

Description

technical field [0001] Aiming at the problem of low visible light catalytic efficiency of single strontium titanate nanoparticle, the present invention provides a simple preparation method of strontium titanate / tin niobate composite nanomaterial, which is mainly used in the technology of photocatalytic decomposition of water to produce hydrogen, and belongs to composite Materials technology field and clean energy field. Background technique [0002] As a cheap, renewable and clean energy, solar energy has attracted widespread attention by using solar energy to drive semiconductor photocatalysts to produce hydrogen. In the past few decades, a large number of photocatalysts have been studied and applied. Among them, strontium titanate (SrTiO 3 ) have been extensively studied due to their excellent photocatalytic activity, corrosion resistance, heat resistance, chemical stability, and superconductivity. However, SrTiO 3 The bandgap width of SrTiO is wide (3.2eV), and it need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/20C01B3/04
CPCB01J23/002B01J23/20B01J35/004B01J2523/00C01B3/042C01B2203/1041B01J2523/24B01J2523/43B01J2523/47B01J2523/56Y02E60/36
Inventor 金雨陈敏姜德立
Owner 平邑仁安中医药产业发展有限公司
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