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A preparation method of bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material

A core-shell structure, composite material technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, water pollutants, etc., can solve the problem of high photogenerated electron-hole recombination rate and large particle size , low photocatalytic efficiency and other problems, to achieve the effects of low cost, less by-products, and simple operation

Active Publication Date: 2019-08-06
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently reported monoclinic scheelite phase BiVO 4 They all show strong photocatalytic oxidation ability under visible light, but there are also some defects, such as large particle size, high photogenerated electron-hole recombination rate, low photocatalytic efficiency, etc.

Method used

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  • A preparation method of bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material
  • A preparation method of bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material
  • A preparation method of bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] BiVO 4 The sample preparation steps are as follows:

[0030] Step A: get the bismuth salt of 0.02mol and be dissolved in the concentrated nitric acid of 20mL to obtain homogeneous solution, stir 2h; Described bismuth salt is Bi(NO 3 ) 3 ·5H 2 O or BiCl 3 ; The vanadium-containing compound is NH 4 VO 3 or Na 3 VO 4 ;

[0031] Step B: 0.02mol of vanadium-containing compound was dissolved in 20mL of 6M NaOH aqueous solution;

[0032] Step C: Add the solution obtained in step B to the solution obtained in step A, then add 0.1 to 0.5 g of cetyltrimethylammonium bromide (CTAB) into the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH Aqueous solution, to obtain a uniform suspension, stirred for 2h;

[0033] Step D: Add the solution obtained in step 3 into a 100mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep it at 180°C for 48h, centrifuge the obtained product with deionized water several times, and then dry it at 60°C...

Embodiment 2

[0035] Weigh the 1.23mmol BiVO that embodiment 1 obtains 4(0.4g) sample, according to n(TA:BiVO 4 )=0.61:1 Add 0.75mmol TA (1.28g), add 15mL deionized water and mix well, then follow RuCl 3 : BiVO 4 The molar ratio of the sample is 0.02:1, adding 0.025mmol RuCl successively 3 (0.005g), stirred at room temperature for 24h. The resulting product was separated, washed and dried to obtain the target product bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material (marked as 0.025BiVO 4 @Ru Ⅲ -TA).

[0036] figure 2 B shows that embodiment 2 of the present invention makes 0.025BiVO 4 @Ru Ⅲ -TA TEM image, the figure shows the comparison with figure 2 a The resulting pure-phase BiVO 4 The core-shell samples synthesized under this condition are covered with a layer of inhomogeneous amorphous shell with a thickness of about 3.5nm. image 3 b and Figure 4 b is the 0.025BiVO obtained in Example 2 of the present invention respectively 4 @Ru Ⅲ...

Embodiment 3

[0038] Weigh the 1.23mmol BiVO that embodiment 1 obtains 4 (0.4g) sample, according to n(TA:BiVO 4 )=0.61:1 Add 0.75mmol TA (1.28g), add 15mL deionized water and mix well, then follow RuCl 3 : BiVO 4 The molar ratio of the sample is 0.08:1, adding 0.1mmol RuCl successively 3 (0.02g), stirred at room temperature for 24h. The obtained product was separated, washed and dried to obtain the target product bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material (marked as 0.1BiVO 4 @Ru Ⅲ -TA).

[0039] figure 2 c shows that embodiment 3 of the present invention makes 0.1BiVO 4 @Ru Ⅲ -TA TEM image, the figure shows the comparison with figure 2 a The resulting pure-phase BiVO 4 The core-shell samples synthesized under this condition are covered with a layer of inhomogeneous amorphous shell with a thickness of about 15nm. image 3 c and Figure 4 c is respectively the embodiment of the present invention 3 to make 0.1BiVO 4 @Ru Ⅲ Infrared s...

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Abstract

The invention belongs to the field of nanocomposite material preparation, and relates to a method for preparing a bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material. First, bismuth vanadate is prepared by hydrothermal method, and then bismuth vanadate, ruthenium trichloride and tannic acid solution are mixed at normal temperature and pressure, and the solution is passed through Ru III It reacts with tannic acid to form a self-assembled complex and coats it on the surface of bismuth vanadate to prepare a core-shell structure composite material of bismuth vanadate@ruthenium-tannic acid complex in one step. This is very important for bismuth vanadate composite materials, especially core-shell structure materials. development is of great significance. The invention has the advantages of simple method, energy saving, green and pollution-free. The synthesized nanocomposite material has rich phenolic hydroxyl groups on its surface and will have great application in the fields of drug carrier, catalysis, removal of organic pollutants in waste water, reduction of heavy metal ions and other fields. It has great application potential, and other functional materials can be constructed on this basis.

Description

technical field [0001] The invention belongs to the field of nanocomposite material preparation, and relates to a method for preparing bismuth vanadate@ruthenium-tannic acid complex core-shell structure composite material. Background technique [0002] The composite material formed by using different material components can not only make use of the properties and characteristics of each component to produce a synergistic effect, but also promote the comprehensive performance of the composite material to be better than that of a single component material, and may be produced due to the combination of different materials. The new properties that single-component materials do not have have great application prospects. The core-shell structure material is a composite material with an ordered assembly structure formed by covering another material with one material through chemical bonds or other forces. It realizes design and tailoring at the nanometer scale. Catalysis, biomedic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/70B01J31/36C02F101/20C02F101/30
CPCC02F1/30C02F1/70B01J31/36C02F2101/20C02F2101/30B01J35/398B01J35/39
Inventor 胡银陈伟巴明伟宋卫国
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI