自从1989年Liu等人预言β-C3N4可能具有超高硬度等特殊性能以来，这种材料得到了科技界和工业界的广泛重视，然而至今尚未获得与理论预测完全相符的实验结果。鉴于这种情况，一方面采用更新的材料制备与检测手段进行合成以获得真正的β-C3N4晶体；另一方面对碳、氮反应所形成的固体材料进行性能研究以寻找可供使用的特殊性能。为此对近年来β-C3N4的研究进行了综合评述。 Since 1989, when Liu et al predicted that β-C3N4 may have special properties such as ultrahigh hardness, the material has received extensive attention in the scientific and industrial fields. However, no experimental results completely consistent with theoretical predictions have been obtained so far. In view of this situation, on the one hand, the new synthesis and detection of materials are used to obtain the real β-C3N4 crystals; on the other hand, the properties of solid materials formed by carbon and nitrogen reactions are studied to find the special properties . In this regard, the research on β-C3N4 in recent years has been comprehensively reviewed.