As a two-dimensional (2D) material, graphene shows excellent advantages in the field of gas sensors due to its inherent large specific surface area and unique electrical properties. However, in the practical application of gas detection, graphene sheet is easy to form irreversible agglomeration and has some limitations such as low sensitivity, long response time and slow recovery speed, which greatly reduce its gas sensing performance. As a gas sensing material, three-dimensional (3D) porous graphene has been extensively studied in recent years owing to its larger specific surface area and stable structure. In order to synthesize graphene with different three-dimensional structures, many methods have been developed. Herein, the synthesis and assembly of three-dimensional graphene and its composites were reviewed, with emphasis on the application of three-dimensional graphene and its composites in the field of gas sensors. The challenges and development prospects of three-dimensional graphene materials in the application of gas sensors were briefly described.

中文翻译：

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用于气体传感器的三维石墨烯及其复合材料

作为一种二维（2D）材料，石墨烯由于其固有的大比表面积和独特的电学特性，在气体传感器领域显示出卓越的优势。然而，在气体检测的实际应用中，石墨烯片易形成不可逆团聚，且存在灵敏度低、响应时间长、恢复速度慢等局限性，使其气敏性能大大降低。作为气敏材料，三维（3D）多孔石墨烯由于其较大的比表面积和稳定的结构，近年来得到了广泛的研究。为了合成具有不同三维结构的石墨烯，已经开发了许多方法。本文综述了三维石墨烯及其复合材料的合成与组装，重点研究三维石墨烯及其复合材料在气体传感器领域的应用。简述了三维石墨烯材料在气体传感器应用中面临的挑战和发展前景。