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A kind of nano palladium immobilized filter paper and its preparation and application

A nano-palladium and filter paper technology, which is applied in the preparation of organic compounds, the preparation of aminohydroxy compounds, chemical instruments and methods, etc., can solve the problems of complex preparation process of palladium nanoparticles, harsh preparation conditions, environmental pollution, etc., and achieves improved reuse. Performance, preparation method is simple, stable and good effect

Inactive Publication Date: 2018-08-03
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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  • A kind of nano palladium immobilized filter paper and its preparation and application
  • A kind of nano palladium immobilized filter paper and its preparation and application
  • A kind of nano palladium immobilized filter paper and its preparation and application

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. 10 mL of 3mM potassium dichromate solution, 1.5 mL of formic acid solution and 15 mL of deionized water were mixed and stirred evenly, and 20 mg 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 exper...

Embodiment 3

[0049] First take 13.91mg of 4-nitrophenol and add it to 10mL of aqueous solution with magnetic stirring to prepare a 10mM light yellow 4-nitrophenol solution, then take 378.3mg of sodium borohydride and dissolve it in 1mL of ice water solution for use. Take 0.6mL 10mM 4-nitrophenol solution, 0.6mL 10M NaBH 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 showed that: with the increase of reaction time, the absorption peak (400nm) of 4-nitrophenol decreased rapidly, while the characteristic peak (300nm) of 4-ami...

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Abstract

The invention relates to a nano palladium immobilized filter paper and its preparation and application. The filter paper is formed by reducing PdCl42-adsorbed on the surface of the filter paper into palladium nanoparticles in situ to form the nano palladium immobilized filter paper. The filter paper is soaked in polyethyleneimine solution, washed with water, then soaked in potassium tetrachloropalladate solution, washed with water to obtain PEI / PdCl42-solid-loaded filter paper; the above-mentioned PEI / PdCl42-solid-loaded filter paper is soaked in sodium borohydride aqueous solution After soaking, take out the filter paper, wash with water, and dry in vacuum. Application of nanometer palladium immobilized filter paper as catalyst. The preparation process of the invention is simple, the preparation time is less, and it is very suitable for industrial production. The prepared nano palladium immobilized filter paper has the characteristics of high catalytic efficiency and good reusability. Therefore, it has broad application prospects in the fields of catalysis and environmental restoration.

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. introduced in detail the research of palladium nanoparticles on the catalysis of C-C crosslinking reaction in organic reactions (Claver et al. Chem. Soc. Rev. 2011, 40, 4973-4985), but there is no carrier-immobilized palladium nanoparticles It is not easy to recycle and reuse, and its application potential will be greatly limited. Fixing or assembling nano-palla...

Claims

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Application Information

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Patent Type & Authority Patents(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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