Graphite-phase carbon nitride sheet material and preparation method thereof

Abstract

A preparation method of a graphite-phase carbon nitride sheet material comprises steps as follows: graphite-phase carbon nitride powder is provided, and the graphite-phase carbon nitride powder is flatly spread on a heated carrier; the heated carrier containing the graphite-phase carbon nitride powder is placed in a tubular furnace, the tubular furnace is heated to 150 DEG C-600 DEG C under the atmosphere of protective gas, the heated carrier containing the graphite-phase carbon nitride powder is kept at the temperature for 1 min-20 h in the ammonia gas atmosphere under negative pressure and finally cooled to the room temperature, and the graphite-phase carbon nitride sheet material is obtained. The invention further provides the graphite-phase carbon nitride sheet material prepared with the method.

Description

technical field [0001] The invention relates to a graphite phase carbon nitride sheet material and a preparation method thereof. Background technique [0002] Most of the visible light catalysts discovered so far are transition metal semiconductor materials. However, such semiconductor materials have obvious disadvantages such as high cost, low photocatalytic efficiency, and non-environmental protection, which seriously restrict their wide application as visible light catalysts. In 2009, Wang Xinchen and others discovered that the organic semiconductor material - graphitic carbon nitride (g-C 3 N 4 ) has excellent visible light photocatalytic decomposition of water to produce hydrogen performance (Nat.Mater.2009,8,76). In addition, the material has excellent physical and chemical properties such as good chemical and thermal stability, no metal, and good visible light response, which has attracted extensive attention from researchers at home and abroad. Graphite carbon nit...

AI Technical Summary

Problems solved by technology

First of all, the liquid phase direct exfoliation method has low efficiency, high energy consumption and low yield, which is not conducive to industrial production, and the graphite phase carbon nitride sheet material prepared by the liquid phase direct exfoliation method does not contain a pore structure and has a low specific surface area. Its visible photocatalytic performance is low (Adv.Mater.2013, 25, 2452); the graphitic carbon nitride sheet material obtained by thermal etching in air atmosphere also does not contain a pore structure, and the band gap is large, making it ineffective Using visible light (Adv.Funct.Mater.2012, 22, 4763); the process parameters of direct thermal polymerization are difficult to control and the cost is high. The specific surface of the graphite phase carbon nitride sheet material prepared by direct thermal polymerization is small, The pore structure is difficult to control and industrial application is difficult (J.Mater.Chem.A2014,2,18924)

Images