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Filter paper with fixedly-carried nano palladium, preparation and applications thereof

A technology of nano-palladium and filter paper, which is applied in the preparation of organic compounds, preparation of amino hydroxyl compounds, chemical instruments and methods, etc., can solve the problems of complex preparation process of palladium nanoparticles, harsh preparation conditions, environmental pollution, etc., and improve the reuse The performance and preparation method are simple and the effect is stable

Inactive Publication Date: 2016-02-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The experimental results show that this material has excellent catalytic and reusable properties. The disadvantage is that the preparation process of palladium nanoparticles is relatively complicated, the preparation conditions are relatively harsh, and it may cause environmental pollution.

Method used

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  • Filter paper with fixedly-carried nano palladium, preparation and applications thereof
  • Filter paper with fixedly-carried nano palladium, preparation and applications thereof
  • Filter paper with fixedly-carried nano palladium, preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Dissolve 100 mg of polyethyleneimine in 5 mL of distilled water to prepare a 20 mg / mL polyethyleneimine aqueous solution. Dissolve 65 mg of potassium tetrachloropalladate in 5 mL of distilled water to prepare a 13 mg / mL potassium tetrachloropalladate aqueous solution. Dissolve 40 mg of sodium borohydride in 5 mL of distilled water to prepare an 8 mg / mL aqueous solution of sodium borohydride for use. Soak the dry ordinary filter paper in the polyethyleneimine aqueous solution prepared above, wash off the polyethyleneimine that is not adsorbed on the surface of the filter paper with distilled water after 5 minutes, and then soak it in the potassium tetrachloropalladate solution. Wash with water after 5 minutes, and finally soak the washed filter paper in sodium borohydride aqueous solution, wash with water after 10 minutes, and dry it in vacuum for 24 hours to obtain nano-palladium-immobilized filter paper. Using SEM to observe the morphology of nano-palladium immobilize...

Embodiment 2

[0047] Add 88.26mg of potassium dichromate and 100mL of water into a beaker and stir it magnetically to prepare a 3mM potassium dichromate solution for use. 10mL of 3mM potassium dichromate solution, 1.5mL of formic acid solution and 15mL of deionized water were mixed and stirred evenly, and 20mg of solid-supported palladium nanoparticle filter paper was soaked in the mixed solution. Under the condition of magnetic stirring, the catalysis experiment of potassium dichromate reduction reaction was carried out by using the prepared material. At each catalytic time point of 0min, 4min, 8min, 12min, 16min, 20min, 24min and 28min, 0.5mL of the reaction solution was diluted to 1mL to measure the concentration of Cr(VI) in the solution. The UV-vis test results showed that the absorption peak (350nm) of Cr(VI) decreased rapidly with the increase of reaction time. Be 28min in reaction time, corresponding catalytic efficiency just can reach 98% (as Figure 5 ). The catalytic experimen...

Embodiment 3

[0049] Add 13.91mg of 4-nitrophenol into 10mL of aqueous solution with magnetic stirring to prepare a 10mM light yellow 4-nitrophenol solution, then dissolve 378.3mg of sodium borohydride in 1mL of ice-water solution for use. Take 0.6mL10mM 4-nitrophenol solution, 0.6mL10MNaBH 4 The solution was mixed with 16.8 mL of deionized water and stirred evenly, and 20 mg of nanometer palladium-immobilized filter paper was soaked in the mixed solution. Catalytic experiments were performed on 4-nitrophenol using the prepared material under magnetic stirring. At each catalytic time point of 0min, 1min, 2min, 3min, 4min, 6min, 8min, 12min, 20min, 28min and 36min, take 0.5mL reaction solution and dilute it to 1.5mL to measure the concentration of 4-nitrophenol in the solution . The UV-vis test results show that: with the increase of reaction time, the absorption peak (400nm) of 4-nitrophenol decreases rapidly, while the characteristic peak (300nm) of 4-aminophenol increases continuously. ...

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Abstract

The invention relates to a filter paper with fixedly-carried nano palladium, preparation and applications thereof. The nano palladium fixedly-carrying filter paper is prepared by in-situ reducing the PdCl4<2>, which is absorbed on the surface of the filter paper, into palladium nano particles. The nano palladium fixedly-carrying filter paper can be soaked in a potassium tetrachloro-palladate solution, and then the filter paper is washed by water to obtain a PEI / PdCl4<2> fixedly-carrying filter paper. The PEI / PdCl4<2> fixedly-carrying filter paper is soaked in a sodium borohydride water solution, and then the filter paper is taken out after soaking, is washed by water, and is finally dried in vacuum to obtain the target product. The nano palladium fixedly-carrying filter paper can be used as a catalyst. The preparation technology is simple, the preparation time is short, and thus the preparation method is very suitable for industrial production. The prepared nano palladium fixedly-carrying filter paper has the characteristics of high catalytic efficiency and good reusability, and thus has a wide application prospect in the fields of catalysis, environmental remediation, and the like.

Description

technical field [0001] The invention belongs to the field of filter paper and its preparation and application, in particular to a nanometer palladium immobilized filter paper and its preparation and application. Background technique [0002] Metal nanomaterials have become a research hotspot because of their many unique properties. In recent years, there have been many research reports on metal nanomaterials in the fields of sensors, drugs, medical imaging, catalysis and environmental governance, and research results on their applications in the field of catalysis. particularly prominent. For example, Claver et al. have introduced in detail the research on the catalysis of C-C crosslinking reactions in organic reactions by palladium nanoparticles (Claver et al. Recycling and reuse are difficult, and its application potential is also greatly limited. Fixing or assembling nano-palladium on nanofibers can effectively solve the above problems ("A preparation method of electros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C01G37/14C07C213/02C07C215/76
Inventor 史向阳刘雷赵毅丽
Owner DONGHUA UNIV
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