Controllable preparation method of an ordered mesoporous carbon electrocatalyst with metal nanoparticles uniformly embedded in the pore wall structure

Abstract

The invention relates to an ordered mesoporous carbon adopting a pore wall structure uniformly embedded with metal nanoparticles and a controllable preparation method of the ordered mesoporous carbon. The controllable preparation method comprises the following step: (1) compounding a mixed solution of palladium chloride and copper nitrate; (2) impregnating a mesoporous silica material SBA-15 with the solution obtained in the step (1), stirring, filtering, washing and drying; (3) conducting calcination reduction on the material prepared in the step (2) to obtain uniformly dispersed Pd-Cu / SBA15; (4) using sucrose as a carbon source, filling a mixed solution of sucrose and sulphuric acid into pore passages of the material prepared in the step (4) in twice, and pyrolyzing and carbonizing sucrose to obtain a Pd-Cu / SBA15 material of which the pore passages are filled with amorphous carbon; (5) placing the material obtained in the step (4) into a 5% HF solution, stirring overnight, and etching SBA15 so as to obtain the mesoporous carbon material Pd-Cu / mC of which the carbon wall is embedded with Pd and Cu nanometer particles. The preparation method is simple in process and lower in cost, the prepared catalyst Pd-Cu / mC is uniform and ordered in pore passage, large in specific surface area, narrow in pore size distribution, good in catalyst component dispersibility, better in conductivity and high in catalytic activity.

Description

technical field [0001] The invention belongs to the field of nitrate removal in water bodies, and relates to a controllable preparation method of an ordered mesoporous carbon electrocatalyst in which metal nanoparticles are uniformly embedded in a pore wall structure. Background technique [0002] In recent years, the pollution of nitrate nitrogen has attracted more and more attention. A large amount of nitrate entering slow-flowing water bodies such as lakes, estuaries, and bays will cause algae and other plankton to multiply rapidly, the dissolved oxygen in the water body will decrease, and fish and other organisms will die in large numbers. A large number of dead aquatic organisms are deposited at the bottom of the lake, decomposed by microorganisms, and consume a large amount of dissolved oxygen, causing a sharp decrease in the dissolved oxygen content of the water body, deteriorating the water quality, affecting the survival of fish, and greatly accelerating the eutroph...

AI Technical Summary

Problems solved by technology

The carrier usually uses metal, graphite, etc. These catalysts have their advantages, but they also have unavoidable defects, such as the specific surface area is not large enough, and the active components are easy to agglomerate, etc.

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