Preparation method of precious metal nanoparticle-loaded 2D bismuth vanadate@PDA core-shell structure composite material

A nanoparticle, core-shell structure technology is applied in the field of organic-inorganic nanocomposite material preparation to achieve the effects of degrading harmful pollutants, being environmentally friendly and simple to operate

Pending Publication Date: 2022-01-04
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology has the advantages of simple method, energy saving, green and pollution-free, etc. There is no report about this kind of technology so far, which explores a new path for the development of new materials

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  • Preparation method of precious metal nanoparticle-loaded 2D bismuth vanadate@PDA core-shell structure composite material
  • Preparation method of precious metal nanoparticle-loaded 2D bismuth vanadate@PDA core-shell structure composite material

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preparation example Construction

[0031] Two-dimensional BiVO 4 The preparation steps of nanosheets are as follows:

[0032] Step a: bismuth salt and sodium dodecylbenzenesulfonate (SDBS) are dissolved in nitric acid solution to obtain solution A according to the molar ratio: bismuth salt: sodium dodecylbenzenesulfonate (SDBS)=1:0.72, Stir for 2h;

[0033] Step b: According to the molar ratio of vanadium-containing compound and bismuth salt: vanadium-containing compound: bismuth salt=1:1, add vanadium-containing compound into NaOH aqueous solution to obtain solution B;

[0034] Step c: Add solution B obtained in step b to solution A obtained in step a, then slowly add an appropriate amount of 2M NaOH aqueous solution, adjust the pH to 6.5, and stir for 2 hours to obtain a uniform suspension;

[0035] Step d: Add the solution obtained in step c into a 50 mL stainless steel reactor lined with polytetrafluoroethylene, keep it at 160 °C for 3 h, separate, wash and dry the obtained product to obtain a two-dimensi...

Embodiment 1

[0043] Two-dimensional BiVO 4 The preparation steps of nanosheets are as follows:

[0044] Step A: Take 1 mmol of Bi(NO 3 ) 3 • 5H 2 O (0.485 g) and 0.72 mmol SDBS (0.250 g) were dissolved in 10 mL of 4M nitric acid to obtain a homogeneous solution;

[0045] Step B: 1 mmol of NH 4 VO 3 (0.117 g) was dissolved in 10 mL of 2M NaOH aqueous solution;

[0046] Step C: Add the solution obtained in step B to the solution obtained in step A, then slowly add an appropriate amount of 2M NaOH aqueous solution, adjust the pH to 6.5, and stir to obtain a uniform suspension;

[0047] Step D: Add the solution obtained in step C into a 50mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep at 160°C for 3h, wash and centrifuge the obtained product alternately with deionized water and absolute ethanol for several times, and then 100°C Drying at lower temperature for 8h, two-dimensional BiVO 4 Nanosheet samples.

[0048] BiVO 4 The preparation steps of @PDA core-...

Embodiment 2

[0055] Two-dimensional BiVO 4 The preparation steps of nanosheets are as follows:

[0056] Step A: Take 1 mmol of Bi(NO 3 ) 3 • 5H 2 O (0.485 g) and 0.72 mmol SDBS (0.250 g) were dissolved in 10 mL of 4M nitric acid to obtain a homogeneous solution;

[0057] Step B: 1 mmol of NH 4 VO 3 (0.117 g) was dissolved in 10 mL of 2M NaOH aqueous solution;

[0058] Step C: Add the solution obtained in step B to the solution obtained in step A, then slowly add an appropriate amount of 2M NaOH aqueous solution, adjust the pH to 6.5, and stir to obtain a uniform suspension;

[0059] Step D: Add the solution obtained in step C into a 50mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep at 160°C for 3h, wash and centrifuge the obtained product alternately with deionized water and absolute ethanol for several times, and then 100°C Drying at lower temperature for 8h, two-dimensional BiVO 4 Nanosheet samples.

[0060] BiVO 4 The preparation steps of @PDA core-...

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Abstract

The invention discloses a preparation method of a precious metal nanoparticle-loaded 2D bismuth vanadate@PDA core-shell structure composite material, which comprises the following steps of: preparing 2D BiVO4 nanosheets by using sodium dodecyl benzene sulfonate as a template and adopting a one-pot hydrothermal method; adding the 2D BiVO4 nanosheets into a dopamine hydrochloride Tris-HCl buffer solution, reacting, separating, washing and drying to obtain a PDA coated 2D BiVO4@PDA core-shell structure composite material; and adding the BiVO4@PDA nanosheet composite material into a noble metal salt solution, and reducing to obtain the noble metal nanoparticle-loaded 2D BiVO4@PDA core-shell structure composite material. The surface of the composite material contains rich hydroxyl groups, and the composite material has greater application potential in the fields of removal of organic pollutants in catalytic wastewater, reduction of heavy metal ions and the like.

Description

technical field [0001] The invention belongs to the field of preparation of organic-inorganic nanocomposite materials, and relates to a 2D BiVO supported by noble metal nanoparticles 4 Preparation method of @PDA core-shell structure composites. Background technique [0002] As we all know, compounding semiconductor and metal nanoparticles to form heterogeneous nanostructures is a common means to improve the quantum efficiency of photocatalysis. The unique surface plasmon resonance (SPR) characteristics of metals can broaden the absorption spectrum range of semiconductors, and the strong magnetic field effect generated can promote the separation of nearby semiconductor electron holes. Polydopamine (PDA), as one of the synthetic eumelanin polymers, has the full range of absorption in the ultraviolet-visible-near-infrared region, making it the most potential photothermal conversion material, and it is rich in catechins Functional groups such as phenol (catechol), amine and im...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/02C02F1/30C02F1/70C02F101/20C02F101/30
CPCB01J31/069C02F1/70C02F1/30C02F2305/10C02F2101/20C02F2101/30C02F1/705B01J35/396B01J35/393B01J35/40B01J35/39Y02W10/37
Inventor 陈伟胡银章芬王玲玲韩飞宋卫国
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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