Nitrogen-doped porous carbon polyhedron@nanometer cobalt phosphide composite catalyst capable of efficiently activating persulfate and preparation method of composite catalyst

Abstract

The invention belongs to the field of water pollution control, and particularly relates to a nitrogen-doped porous carbon polyhedron@nanometer cobalt phosphide composite catalyst capable of efficiently activating persulfate and a preparation method of the composite catalyst. The preparation method comprises the steps that basic cobaltous carbonate nanowires are prepared by using a hydrothermal method, the basic cobaltous carbonate nanowires are phosphorized to obtain cobalt phosphide nanowires, a metal-organic framework ZIF-8 grows around the cobalt phosphide nanowires by using a self-assemblymethod, and through high-temperature calcination, the nitrogen-doped porous carbon polyhedron@nanometer cobalt phosphide composite catalyst is obtained. Compared with an existing heterogeneous catalyst, the composite catalyst has nonmetal catalysis activity and metal catalysis activity and is high in persulfate activating efficiency, high in free radical production, wide in pH application range and capable of being recycled and widely used, obviously reducing the consumption of a catalyst and a oxidizing agent and shortening reaction time.

Description

technical field

[0001] The invention belongs to the field of water pollution control, in particular to a nitrogen-doped porous carbon polyhedron@nano cobalt phosphide composite catalyst capable of efficiently activating persulfate and a preparation method thereof. Background technique

[0002] Refractory organic pollutants produced by industrial production, etc. enter water bodies and will be transmitted through the food chain and endanger human health. Conventional biochemical treatment is difficult to effectively remove refractory organic matter, so it is necessary to use advanced treatment process to achieve removal. The advanced oxidation technology based on sulfate radical has become an advantageous process for removing refractory organic matter due to its high redox potential, easy generation, and wide pH range. The generation of sulfate radicals by homogeneous catalysis is faced with the problems of large dosage of reagents and high loss rate. Therefore, a lot of res...

Images