Preparation method of three-dimensional porous g-C3N4 material

Abstract

The invention relates to the field of semiconductor materials and aims at providing a preparation method of a three-dimensional porous g-C3N4 material. The preparation method of the three-dimensional porous g-C3N4 material comprises the following three steps: A, dropwise adding an H2SO4 aqueous solution into a melamine aqueous solution at the temperature of 80 DEG C to form white suspension liquid; continuously stirring for 2 hours to obtain precipitate; filtering the precipitate, washing with distilled water and absolute ethyl alcohol, and drying for 24 hours to obtain melamine sulphate; B, putting the melamine sulphate into a corundum boat, then putting the corundum boat in a tubular furnace for sintering, and after the tubular furnace is cooled to room temperature, grinding the obtained yellow polymerization product to obtain powdery particles, namely g-C3N4 particles are obtained; and C, carrying out a g-C3N4 hydrothermal protonation technology. The preparation method of the three-dimensional porous g-C3N4 material has the beneficial effects that polymerization temperature of g-C3N4 is effectively reduced, polymerization energy of melamine is reduced through protonation on the melamine, and the melamine can be polymerized at relatively low temperature to generate graphite-like g-C3N4.

Description

Technical field [0001] The present invention relates to the field of semiconductor materials, in particular to a three-dimensional porous g-C 3 N 4 Material preparation method. Background technique [0002] Graphite-like carbon nitride (g-C 3 N 4 ) Because of its special physical and chemical properties, it has shown good application prospects in solar energy utilization, environmental protection and other fields, and has attracted widespread attention. However, g-C prepared by traditional methods 3 N 4 Most of them are dense bulk particles with low specific surface area and poor photocatalytic activity, which limits their wide application. At present, hard template and soft template methods are mainly used to control the preliminary polymerization process of precursors such as melamine or urea to obtain g-C with a large porous surface. 3 N 4 Materials; or use physical and chemical methods to block g-C 3 N 4 Perform post-processing to obtain nanostructured materials such as nanot...

AI Technical Summary

Problems solved by technology

However, hard templates require HF or NH in post-processing 4 HF 2 Wait for a more toxic solution to dissolve, and the soft template is often in g-C 3 N 4 Excessive carbon atoms were introduced into the matrix to form additional exciton recombination sites, which reduced the photocatalytic activity

However, the yield of nanostructured materials obtained through post-processing is extremely low, and it is still difficult to recycle in practical applications.

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