Preparation method and application of load-type metal phthalocyanine catalyst

A metal phthalocyanine, supported technology, applied in the field of catalyst material research, can solve the problems of easy deactivation, waste water pollution, cumbersome process, etc., and achieve the effect of simple method, environmental friendliness and low cost

Inactive Publication Date: 2010-08-18
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using the Fenton reaction has two drawbacks: one is that the addition of iron ions will pollute the treated wastewater; the other is that the Fenton reaction must be used under acidic conditions (pH value is around 3.0)
However, in the process of loading phthalocyanine, these loading methods mainly have the following defects: (1) the catalysts obtained by these loading methods still have dimers, resulting in low catalytic activity and easy deactivation; (2) prepared by chemical bonding A series of complex steps are required, and the process is cumbersome, such as using silylating

Method used

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  • Preparation method and application of load-type metal phthalocyanine catalyst

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Experimental program
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Effect test

Embodiment 1

[0016] Take 1 gram of average pore size 30 The mesoporous molecular sieve MCM-41 sample was directly impregnated in the aqueous solution of cobalt phthalocyanine tetrasulfonate with a concentration of 50 μmol / L, the pH value of the solution was adjusted to 10, immersed at room temperature for 4 hours, stirred intermittently, then centrifuged, and dried at 80°C Dry, and prepare the supported metal phthalocyanine catalyst sample encapsulated by mesoporous molecular sieve MCM-41.

Embodiment 2

[0018] Take 1 gram of average pore size 30 The mesoporous molecular sieve MCM-41 sample was directly impregnated in an aqueous solution of cobalt phthalocyanine tetrasulfonate with a concentration of 50 μmol / L. Dry, and prepare the supported metal phthalocyanine catalyst sample encapsulated by mesoporous molecular sieve MCM-41.

Embodiment 3

[0028] Take 1 gram of average pore size 30 The mesoporous molecular sieve MCM-41 sample was directly impregnated in an aqueous solution of cobalt phthalocyanine tetrasulfonate with a concentration of 10 μmol / L. Dry, and prepare the supported metal phthalocyanine catalyst sample encapsulated by mesoporous molecular sieve MCM-41.

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Abstract

The invention discloses a preparation method of load-type metal phthalocyanine catalyst, comprising: directly dipping a molecular sieve into phthalocyanine aqueous solution of which the molar volume density is 10-500 mu mol/L; adjusting the pH value to be 10-12; dipping at room temperature; stirring at interval; and centrifuging and drying to prepare the load-type metal phthalocyanine catalyst. The invention discloses an application of the catalyst in removing organic pollutants in water. The load-type metal phthalocyanine catalyst prepared with the invention has simple method, environment protection and low cost, the catalytic activity thereof is far higher than that of unloaded phthalocyanine catalyst, and the reaction condition is moderate and is not limited by waste water pH value. The load-type metal phthalocyanine catalyst does not generate secondary pollution, can be used for oxidation treatment of organic waste water systems and has industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst material research, and in particular relates to a preparation method of a supported metal phthalocyanine catalyst and its application in removing organic pollutants in wastewater. Background technique [0002] At present, the Fenton reaction in which hydrogen peroxide reacts with ferrous ions to generate hydroxyl radicals has been widely used in the degradation of organic pollutants. However, the use of Fenton reaction has two drawbacks: one is that the addition of iron ions will pollute the treated wastewater; the other is that Fenton reaction must be used under acidic conditions (pH value is around 3.0). However, the pH value of most of the actual wastewater is around 8. In this way, it is necessary to add acid to lower the pH value before treatment. If the treated wastewater is reused, followed by biological treatment or discharged into the environment, it needs to be neutralized with alkali, ...

Claims

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Application Information

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IPC IPC(8): B01J31/22C02F1/58
Inventor 文岳中沈忱思刘维屏
Owner ZHEJIANG UNIV
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