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Combined supported catalyst and preparation method and application thereof

A supported catalyst and catalytic degradation technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., to protect the ecological environment, excellent catalytic activity, and prolong the agricultural industry. chain effect

Pending Publication Date: 2020-09-04
XINJIANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on using Keggin-type phosphotungstic acid as a carrier to further load Ru nanoparticles to obtain ruthenium nanoparticles / saturated Keggin-type phosphotungstic acid-supported catalyst

Method used

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  • Combined supported catalyst and preparation method and application thereof
  • Combined supported catalyst and preparation method and application thereof
  • Combined supported catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Saturated Keggin type phosphotungstic acid (H 3 PW 12 o 40 )Synthesis

[0036] Dissolve 10g of sodium tungstate and 1.6g of disodium hydrogen phosphate in 50mL of water at a temperature of 60°C, add 20mL of concentrated hydrochloric acid (12mol / L) dropwise to the solution, and continue heating for half a minute (if the solution is blue, Need to add 3% hydrogen peroxide or bromine water to the solution dropwise until the blue color fades), cool to room temperature, filter with suction, and collect the precipitate, which is Keggin type phosphotungstic acid H 3 PW 12 o 40 .

[0037] (2) Synthesis of ruthenium nanoparticles

[0038] Add 0.25mmol ruthenium trichloride hydrate and 2.5mmol PVP to 100mL ethanol aqueous solution (volume concentration: 49.5%) in sequence, reflux at 80°C for 2 hours, and rotary steam to obtain a black solid. After cooling, use a certain volume of water to obtain Ruthenium nanoparticles solution, C Ru =1.7×10 -3 mol / L.

[0039] (3)Ru / ...

Embodiment 2

[0042] (1) Saturated Keggin type phosphotungstic acid (H 3 PW 12 o 40 )Synthesis

[0043] Dissolve 9g of sodium tungstate and 1.5g of disodium hydrogen phosphate in 52mL of water at a temperature of 62°C, add 19mL of concentrated hydrochloric acid (12mol / L) dropwise to the solution, and continue heating for half a minute (if the solution is blue, Need to add hydrogen peroxide or bromine water with a volume concentration of 3% to the solution dropwise until the blue color fades), cool to room temperature, filter with suction, and collect the precipitate, which is Keggin-type phosphotungstic acid H 3 PW 12 o 40 .

[0044] (2) Synthesis of ruthenium nanoparticles

[0045] Add 0.26mmol of ruthenium trichloride hydrate and 2.6mmol of PVP to 100mL of ethanol aqueous solution (49.5% in volume concentration) successively, reflux at 82°C for 3 hours, and rotary steam to obtain a black solid, which is obtained by using a certain volume of water after cooling. Ruthenium nanopartic...

Embodiment 3

[0049] (1) Saturated Keggin type phosphotungstic acid (H 3 PW 12 o 40 )Synthesis

[0050] Dissolve 11g of sodium tungstate and 1.7g of disodium hydrogen phosphate in 48mL of hot water. Add 21mL of concentrated hydrochloric acid (12mol / L) dropwise to the solution, and continue heating for half a minute (if the solution turns blue, add hydrogen peroxide or bromine water with a volume concentration of 3% to the solution until the blue color fades) , cooled to room temperature, suction filtered, and the precipitate was collected, which is Keggin type phosphotungstic acid H 3 PW 12 o 40 .

[0051] (2) Synthesis of ruthenium nanoparticles

[0052] Add 0.24mmol ruthenium trichloride hydrate and 2.4mmol PVP to 100mL ethanol aqueous solution (volume concentration: 49.5%) in sequence, reflux at 78°C for 2 hours, and rotary evaporate to obtain a black solid. After cooling, use a certain volume of water to obtain Ruthenium nanoparticles solution, C Ru =1.7×10 -3 mol / L.

[0053]...

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Abstract

The invention discloses a combined supported catalyst composed of ruthenium nanoparticles and saturated Keggin type phosphotungstic acid and a preparation method and application thereof. The preparation method comprises the following steps: dissolving sodium tungstate and disodium hydrogen phosphate into hot water; dropwise adding concentrated hydrochloric acid, cooling to room temperature and carrying out suction filtration, wherein the collected precipitate is Keggin type phosphotungstic acid; besides, adding ruthenium trichloride hydrate and PVP are sequentially into the ethanol water solution, performing backflowing for 2-3h at temperature of 78-82 DEG C and performing rotary evaporation to obtain black solid ruthenium nanoparticles; and finally, mixing the saturated Keggin type phosphotungstic acid solution and the ruthenium nanoparticle solution according to the same volume, stirring at 58-62 DEG C for 1 hour, and carrying out vacuum drying at 60-80 DEG C to obtain the combined supported catalyst Ru / H3PW12O40. The supported catalyst has the correlation of directionally catalyzing and degrading cellulose to generate reducing sugar; in addition, the supported catalyst also shows a potential catalytic effect in the aspect of catalytic degradation of antibiotics.

Description

technical field [0001] The invention belongs to the field of solid acid catalysts, in particular to a combined supported catalyst composed of ruthenium nanoparticles and saturated Keggin type phosphotungstic acid and its preparation method and application. Background technique [0002] In the near future, fossil fuel reserves will be gradually exhausted. In order to meet the growing energy demand and environmental concerns, more and more research efforts are devoted to finding alternative energy and chemical raw materials that can replace fossil fuels. Compared with traditional energy sources such as oil, coal and natural gas, biomass resources are abundant, cheap and renewable. The use of biomass as an energy source may solve two major problems facing mankind: the global energy crisis and the greenhouse effect. Therefore, biomass will become the best choice to replace traditional energy sources. [0003] Both homogeneous and heterogeneous catalysts can be used for biomass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18C13K13/00C02F1/72C02F103/34
CPCB01J27/188C13K13/00C02F1/725C02F2103/343
Inventor 谭瑞康刘尊奇郭丽娜侯艺峰
Owner XINJIANG AGRI UNIV