Volatile organic compounds (VOCs) are major gaseous pollutants and one of the main causes of environmental problem, which can be extremely harmful to human health. Previous research has shown that photocatalytic oxidation is regarded as a promising technology to remove VOCs. However, for the time being, the photocatalytic performance in the field of removing VOCs by multiple reported photocatalysts cannot meet the demand of the practice. In this study, we have successfully synthesized a series of 3D gel composites with g-C 3 N 4 (GC) and graphite oxide as precursors by a simple hydrothermal and freeze-drying method, which shows good photocatalytic degradation performance for gas toluene as model VOCs. The highest photocatalytic degradation ratio for gaseous toluene is about 86% in 180 min, which is about 3 times that of pure GC. The reason for the results is due to the strong adsorption capacity and very fast electrical conductivity of three dimensional (3D) reduced graphene oxide (RGO). This study implies that the 3D GC-RGO gels have potential usefulness for removing VOCs to meet the demand of the practice.

中文翻译：

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3D g-C3N4 还原氧化石墨烯凝胶对气态甲苯的优异光催化降解性能

挥发性有机化合物（VOCs）是主要的气态污染物，是造成环境问题的主要原因之一，对人体健康极为有害。先前的研究表明，光催化氧化被认为是一种有前途的去除VOCs的技术。然而，目前多种报道的光催化剂在去除VOCs领域的光催化性能还不能满足实践的需要。本研究以gC 3 N 4 (GC)和氧化石墨为前驱体，采用简单的水热冷冻干燥法，成功合成了一系列3D凝胶复合材料，对作为模型VOCs的气体甲苯具有良好的光催化降解性能。180 min内对气态甲苯的最高光催化降解率约为86%，约为纯GC的3倍。结果的原因是由于三维（3D）还原氧化石墨烯（RGO）的强吸附能力和非常快的导电性。该研究表明 3D GC-RGO 凝胶具有去除 VOC 以满足实践需求的潜在用途。