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Method for preparing bismuth nanoparticles on oxide substrate

A bismuth nanometer and oxide technology, which is applied in the field of photocatalytic materials, can solve the problems of low density, uneven particle size and serious agglomeration of Bi nanoparticles, and achieves the effect of simple and easy preparation method, overcoming low density and easy realization.

Active Publication Date: 2018-09-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the reported Bi / semiconductor heterojunction system, Bi nanoparticles are mostly of low density, severe agglomeration, and uneven particle size.

Method used

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  • Method for preparing bismuth nanoparticles on oxide substrate
  • Method for preparing bismuth nanoparticles on oxide substrate
  • Method for preparing bismuth nanoparticles on oxide substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. Weigh 2.0885g of SBN Ps and 0.0946g of NaBH 4 ;

[0030] b. Transfer the substance in step a to an agate mortar, mix well and grind for 30min;

[0031] c. Transfer the mixture in step b to a porcelain boat and place it in a tube furnace for calcination. The calcination conditions are: first use Ar to purge the air in the tube furnace (flow rate is 200mL / min, time is 2h), and then Adjust the flow rate to 120mL / min and start calcination, the calcination temperature is 300℃, and the time is 1h;

[0032] d. Centrifugally wash the sample in step c with ultrapure water for 3-4 times, and then dry it in a vacuum drying oven at 60°C for 6 hours. After drying, the sample can be obtained.

[0033] e. TEM characterization of the prepared target product, the results are as follows figure 2 Shown from figure 2 It can be seen that Bi nanoparticles have grown on SrBi 2 Nb 2 O 9 On the surface of the sheet, the particle size of the generated particles is relatively small, mainly nanoparti...

Embodiment 2

[0035] a. Weigh 2.0885g of SBN Ps and 0.0946g of NaBH 4 ;

[0036] b. Transfer the substance in step a to an agate mortar, mix well and grind for 30min;

[0037] c. Transfer the mixture in step b to a porcelain boat and place it in a tube furnace for calcination. The calcination conditions are: first use Ar to purge the air in the tube furnace (flow rate is 200mL / min, time is 2h), and then Adjust the flow rate to 120mL / min and start calcination, the calcination temperature is 400℃, and the time is 1h;

[0038] d. Centrifugally wash the sample in step c with ultrapure water for 3-4 times, and then dry it in a vacuum drying oven at 60°C for 6 hours. After drying, the sample can be obtained.

[0039] e. TEM characterization of the prepared target product, the results are as follows image 3 Shown from image 3 It can be seen that the smaller particle size of the generated particles is mainly nanoparticles with a diameter of 5 nm to 7 nm.

Embodiment 3

[0041] The preparation process is the same as in Example 2, except that the calcination temperature in step b is 500°C, and the sample is characterized by TEM. The results are as follows Figure 4 Shown from Figure 4 It can be seen that the particle size of the generated particles is relatively small, mainly nanoparticles with a diameter of 5 nm to 7 nm.

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Abstract

The invention discloses a method for preparing bismuth nanoparticles on an oxide substrate. The method comprises the following steps: uniformly mixing SrBi2Nb2O9 with NaBH4, calcining for 1-5 hours at300-800 DEG C in the presence of an inert atmosphere, washing, and drying, thereby obtaining the bismuth nanoparticles on the oxide substrate. In the presence of a reducing agent and an Ar atmosphere, non-noble metal Bi nanoparticles with high density, single dispersion and uniform and controllable particle sizes are grown in situ on the surface of SrBi2Nb2O9 with a semimetal Bi as a raw materialby using a calcining method, and in addition, the particle size of the Bi nanoparticles is 3-7 nm.

Description

Technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to a method for preparing bismuth nanoparticles on an oxide substrate. Background technique [0002] Metal nanoparticles (NPs) have attracted great attention due to their unique properties and wide applications. Semi-metal Bi is a type of photocatalytic material used in photocatalytic technology. Due to its stable chemical properties, low cost and easy availability, non-toxicity, and excellent electron transport capabilities, it is considered to be the most promising material in photocatalytic technology. . However, in the reported Bi / semiconductor heterojunction system, there is little research work on the formation of Bi / semiconductor heterojunction by in-situ growth of Bi nanoparticles based on Bi-based semiconductor materials. Moreover, in the reported Bi / semiconductor heterojunction system, Bi nanoparticles mostly have low density, serious agglomeration, and uneven particle s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31
CPCB01J23/31B01J35/39
Inventor 李英宣郝九江惠丹屏王传义孙毅
Owner SHAANXI UNIV OF SCI & TECH
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