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Three-dimensional orderly macropore InVO4-BiVO4 supported noble metal nanometer photo-catalyst, preparation method and application of photo-catalyst

A nano-photocatalyst, invo4-bivo4 technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., to achieve good application prospects

Inactive Publication Date: 2014-10-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no literature or patents have reported this kind of InVO with a three-phase composite structure with three-dimensional ordered macropore structure, heterojunction and plasmon resonance effect. 4 -BiVO 4 Supporting noble metal (such as Au, Pd, Ag, etc.) nano photocatalyst

Method used

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  • Three-dimensional orderly macropore InVO4-BiVO4 supported noble metal nanometer photo-catalyst, preparation method and application of photo-catalyst
  • Three-dimensional orderly macropore InVO4-BiVO4 supported noble metal nanometer photo-catalyst, preparation method and application of photo-catalyst
  • Three-dimensional orderly macropore InVO4-BiVO4 supported noble metal nanometer photo-catalyst, preparation method and application of photo-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: with HAuCl 4 As a source of precious metals, polyvinyl alcohol (PVA, 10000g / mol; the molar ratio of Au to PVA is 1.5 / 1) is used as a protective agent, and Au with a concentration of 0.01mol / L is prepared 3+ Solution; under ice-water bath conditions, measure a certain volume of Au according to the stoichiometric ratio (Au:InBi-3D=0.15wt%) 3+ The ionic solution is added to deionized water that is 49 times its volume, and then a certain volume of NaBH with a concentration of 0.05mol / L 4 Solution (Au and NaBH 4 The molar ratio is 5 / 1, ready-to-use and ready-to-use) is quickly added to it, vigorously bubbling for 20 minutes, and the Au metal sol is obtained; the corresponding mass of InBi-3D carrier is added to the Au metal sol prepared above, and in the dark Continue bubbling for 10h to deposit and chemically adsorb Au metal nanoparticles on the surface of the carrier; dry the above-mentioned substance obtained by filtration at 200°C for 2h, then wash it wit...

Embodiment 2

[0022] Embodiment 2: configuration 100mL concentration is the MB solution of 20mg / L in photocatalytic quartz reactor, adds 0.6mL mass fraction and is 30wt% H 2 o 2 The solution was added with 0.1 g of Au / InBi-3D photocatalyst prepared in Example 1, protected from light, sonicated for 30 minutes, stirred by bubbling, and then stirred for 3 hours in the dark after adding a condensing device. Afterwards, the suspension was irradiated under visible light and stirred continuously, and 5mL samples were taken from the solution every 10min, a total of 10 samples were taken, and the absorbance of the obtained sample solution at λ=665nm was tested. MB can be completely degraded after 50 min of visible light irradiation.

Embodiment 3

[0023] Embodiment 3: configure the mixed dye solution that 100mL RhB and MB form in photocatalytic quartz reactor, wherein the concentration of RhB and MB is respectively 15mg / L and 20mg / L, add 0.6mL mass fraction and be the H of 30wt% 2 o 2 The solution was added with 0.1 g of Au / InBi-3D photocatalyst prepared in Example 1, protected from light, sonicated for 30 minutes, stirred by bubbling, and then stirred for 3 hours in the dark after adding a condensing device. Afterwards, place the suspension under visible light irradiation and keep stirring, take 5mL samples from the solution at regular intervals, take a total of 10 samples, and test the absorbance of the obtained sample solution at λ=554nm and λ=665nm. The concentration of RhB and MB decreased to 0.4mg / L and 1.0mg / L respectively after visible light irradiation for 110min.

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Abstract

The invention discloses a three-dimensional orderly macropore InVO4-BiVO4 supported noble metal nanometer photo-catalyst, a preparation method and application of the photo-catalyst, belonging to the technical fields of photo-response catalysts and nanometer function materials. According to the photo-catalyst, InVO4-BiVO4 with 3DOM (Three-dimensional Orderly Macropore) structure is taken as a carrier; InBi-3D supported M novel metal is prepared by using a bubbling reduction method under the protection of PVA (Poly Vinyl Alcoho) or PVP (Poly Vinyl Pyrrolidone). A preparation method of the photo-catalyst comprises the following steps: (a) preparing a noble metal solution by taking HAuCl4 or PdCl2 as a noble metal source and taking polyvinyl alcohol as a protective agent or taking AgNO3 as a noble metal source and taking polyvinyl pyrrolidone as a protective agent; (b) adding the noble metal solution into NaBH4 and preparing M metal sol; (c) adding InBi-3D into the M meal sol and bubbling in the dark; and (d) filtering, washing and drying. The catalyst has the 3DOM structure, a heterogeneous structure and a plasma effect and can be used for efficiently degrading organic dye such as rhodamine B, methylene blue or a mixture of the rhodamine B and methylene blue.

Description

technical field [0001] The invention relates to three-dimensional ordered macroporous InVO 4 -BiVO 4 Supported noble metal nanophotocatalyst, preparation and application, specifically related to the three-phase composite with three-dimensional ordered macroporous structure, heterojunction and plasmon resonance effect, which can efficiently degrade rhodamine B, methylene blue and mixed organic dyes under visible light irradiation Structured InVO 4 -BiVO 4 Nanophotocatalysts loaded with precious metals (such as Au, Pd, Ag, etc.), preparation and application, belong to the technical field of photoresponsive catalysts and nanometer functional materials. Background technique [0002] Semiconductor materials are research hotspots in the field of photocatalytic technology. High-efficiency semiconductor photocatalysts can not only fully absorb sunlight energy and convert it into electrons (e – )-hole (h + ) Yes, it is also necessary to be able to transfer these carriers to the...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01J23/68C02F1/30C02F103/30
Inventor 戴洪兴吉科猛邓积光
Owner BEIJING UNIV OF TECH
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