Preparation method and application of sulfur-doped graphite-phase carbon nitride nanosheet loaded graphene and ferroferric oxide composite magnetic photocatalyst

Abstract

The invention provides a sulfur-doped graphite-like carbon nitride nanosheet loaded graphene and ferroferric oxide composite magnetic photocatalyst. A sulfur-doped graphite-like carbon nitride nanosheet is taken as a carrier, and graphene and ferroferric oxide particles are modified on the sulfur-doped graphite-like carbon nitride nanosheet. The preparation method comprises the following steps: preparing sulfur-doped graphite-like carbon nitride nanosheets by using thiourea through high-temperature pyrolysis, preparing a sulfur-doped graphite-like carbon nitride loaded graphene composite material by using an impregnation method, and preparing the sulfur-doped graphite-like carbon nitride loaded graphene and ferroferric oxide composite photocatalyst material by using an alkaline-thermal coprecipitation method. The composite magnetic photocatalyst has the advantages of high photocatalytic activity, good stability, magnetic force and easy recovery, and the preparation process has the advantages of simple operation, low cost and good safety. The composite magnetic photocatalyst can be used for treating wastewater containing various antibiotics and is good in stability and practicability, high in efficiency, easy and convenient to operate, low in cost and high in recycling value.

Description

technical field [0001] The invention belongs to the field of functional composite photocatalyst technology and application, and relates to a graphite-like phase carbon nitride nanosheet composite photocatalyst and its preparation method and application, especially a sulfur-doped graphite-like phase carbon nitride nanosheet-supported graphene Preparation method and application of composite magnetic photocatalyst with ferric oxide. Background technique [0002] In recent years, the problems of environmental water pollution and energy shortage have become increasingly prominent, and traditional environmental remediation technologies have gradually failed to meet people's requirements. Therefore, finding a new type of efficient and energy-saving environmental remediation technology has become one of the current research hotspots. In recent years, the research on photocatalytic advanced oxidation technology based on semiconductor catalysts has attracted the attention of researche...

AI Technical Summary

Problems solved by technology

However, the commonly used traditional methods for the preparation of graphite-like carbon nitride have problems such as large blocky particles, small specific surface area, low crystallinity, and incomplete polymerization, which limit the application prospects of carbon nitride materials. Its preparation method can be further improved

At the same time, in terms of the properties of use, the current graphite-like carbon nitride still has problems such as high recombination rate of photogenerated electrons and holes, and difficulty in recycling catalysts in the field of water treatment.

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