热缩聚合成法是指由简单的热聚合或热解法制备g-C3N4材料的方法，通常

Thermal shrinkage polymerization method refers to the method of preparing g-C3N4 material by simple thermal polymerization or pyrolysis method. The precursors usually used are cyano compounds (monocyanoamine, dicyanoamine or melamine), g-C3N4 It is prepared by thermal polymerization of the precursor in an inert gas (nitrogen or argon, etc.) below 550 ℃ -600 ℃. The polymerization process can be carried out at a higher temperature, which indicates that the material has a certain thermal stability. The reaction temperature is evenly heated from normal temperature to 550 ℃ or 600 ℃, and then kept for a while, g-C3N4 can be synthesized. However, the reaction temperature should not be too high, because carbon nitride will decompose into gases such as ammonia and CxNyHz when above 700 ℃.

Heat-shrink polymerization method refers to the method of preparing g-C3N4 material by simple heat polymerization or pyrolysis method, usually used for cyanide-containing compounds (monocyline, cyanamide or melamine), g-C3N4 is prepared by the front body in an inert gas (nitrogen or argon, etc.) below 550 degrees C-600 degrees C heat polymerization preparation. The polymerization process can be carried out at a higher temperature, indicating that the material has a certain thermal stability. The reaction temperature is evenly heated from room temperature to 550 degrees C or 600 degrees C, and then kept warm for a period of time, g-C3N4 can be synthesized. However, the reaction temperature should not be too high, as carbon nitride breaks down into gases such as ammonia and CxNyHz when it is above 700 degrees C.

The method of thermal condensation polymerization refers to the method of preparing g-c3n4 material by simple thermal polymerization or pyrolysis method. Generally, the precursor used is cyano compound (cyanamide, dicyandiamide or melamine). G-c3n4 is prepared by thermal polymerization of the precursor in inert gas (nitrogen or argon, etc.) under 550 ℃ - 600 ℃. The polymerization process can be carried out at high temperature, which shows that the material has certain thermal stability. G-c3n4 can be synthesized by heating the reaction temperature from room temperature to 550 ℃ or 600 ℃ and then holding it for a period of time. However, the reaction temperature should not be too high, because when the carbon nitride temperature is above 700 ℃, it will decompose into ammonia and cxnyhz and other gases.<br>