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Preparation method for Pd/Fe/PVDF (Polyvinylidene Fluoride).Al2O3 catalyst based on modification

A matrix modification and catalyst technology, applied in the fields of chemical industry and catalyst, can solve problems such as application limitations, difficult contact infiltration, pollution, etc.

Inactive Publication Date: 2014-06-25
HARBIN NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Because polyvinylidene fluoride (PVDF) has acid resistance, alkali resistance and particularly stable performance, it has attracted people's attention as a carrier. Although PVDF has many advantages, it is easy to cause membrane fouling due to its strong hydrophobicity, making the PVDF membrane The application has been severely limited, but the hydrophobicity of the PVDF carrier makes it difficult to contact and infiltrate with aqueous solution. In order to successfully load the nano-Pd / Fe catalytic reductant on the PVDF hydrophobic material, it is necessary to effectively hydrophilic the carrier. Modification to improve the hydrophilicity of the PVDF carrier surface

Method used

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  • Preparation method for Pd/Fe/PVDF (Polyvinylidene Fluoride).Al2O3 catalyst based on modification
  • Preparation method for Pd/Fe/PVDF (Polyvinylidene Fluoride).Al2O3 catalyst based on modification
  • Preparation method for Pd/Fe/PVDF (Polyvinylidene Fluoride).Al2O3 catalyst based on modification

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Embodiment Construction

[0025] 1 Preparation process of PVDF·Al2O3 carrier

[0026] In the experiment of loading nano-Pd / Fe with PVDF commercial film, it was found that the mechanical properties of the modified PVDF commercial film decreased. . Al2O3-modified PVDF supports were prepared in experiments, and the addition amounts of nano-Al2O3 were 0%, 1%, 2%, 3%, and 4%, respectively, expressed as PVDF-0, PVDF-1, PVDF-2, PVDF-3, PVDF-4, carrier composition and preparation conditions are shown in Table 1.

[0027] Table 1 Carrier composition and preparation conditions

[0028]

[0029] Dissolve a certain amount of polyvinylidene fluoride powder in N,N-dimethylacetamide solvent, keep stirring until completely dissolved, add nano-aluminum oxide (Al2O3) particles to it, add dispersant sodium hexametaphosphate ( (NaPO 3 ) 6 ) to promote the uniform dispersion of particles, adding pore-forming agent polyvinylpyrrolidone (PVP) to make the prepared carrier have certain pores, when Al2O3 is uniformly mi...

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Abstract

The invention discloses a preparation method for a Pd / Fe / PVDF (Polyvinylidene Fluoride).Al2O3 catalyst based on modification. The method comprises the following steps: (1) preparing a PVDF.Al2O3 modified carrier; (2) preparing Fe<2+> / PVDF.Al2O3 crossed with PAA (Poly Acrylic Acid); (3) preparing a nano Pd / Fe / PVDF.Al2O3 catalytic reducing agent. According to the preparation method, the PVDF.Al2O3 carrier is prepared by carrying out base modification on a PVDF carrier so as to improve the loading amount of iron and improve the dechlorinating rate.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and catalyst, and in particular relates to a preparation method of a substrate-modified Pd / Fe / PVDF·Al2O3 catalyst. Background technique [0002] Because polyvinylidene fluoride (PVDF) has acid resistance, alkali resistance and particularly stable performance, it has attracted people's attention as a carrier. Although PVDF has many advantages, it is easy to cause membrane fouling due to its strong hydrophobicity, making the PVDF membrane The application is severely limited, but the hydrophobicity of the PVDF carrier makes it difficult to contact and infiltrate the aqueous solution. In order to successfully load the nano-Pd / Fe catalytic reductant on the PVDF hydrophobic material, it is necessary to effectively hydrophilic the carrier. Modification to improve the hydrophilicity of the PVDF carrier surface. Contents of the invention [0003] The purpose of this invention is to provide a k...

Claims

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Application Information

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IPC IPC(8): B01J31/06
Inventor 孟昭虹
Owner HARBIN NORMAL UNIVERSITY
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