Herein, we incorporated a Z‐scheme g‐C3N4/α‐Fe2O3 into three‐dimensional porous graphene aerogel. Graphene aerogels are a promising framework in their use for practical photocatalysis by abundant reaction sites, efficient mass transport of reactants and recyclability via their free‐standing framework. At the same time, a Z‐scheme charge transfers among g‐C3N4, α‐Fe2O3, and conductive graphene inhibits the rapid recombination of the photo‐induced electrons and holes. The ternary g‐C3N4/α‐Fe2O3/graphene aerogels (CNFGA) showed significantly enhanced photocatalytic activity which demonstrated 4.75 times greater methylene blue degradation and 17.5 times higher photocurrent density than those of exfoliated g‐C3N4 under visible light. In addition, CNFGA exhibited a robust photo‐stability with a simple recovery method while showing only a ~2% decrease in photocatalytic performance after five cycles. These results suggest that our ternary Z‐scheme photocatalyst based on a graphene aerogel has potential use in practical photocatalysis for various environmental applications.

中文翻译：

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g-C3N4 /α-Fe2O3在3D石墨烯网络上的三元杂化气凝胶：高效且可回收的Z方案光催化剂

在这里，我们将Z方案g-C3N4 /α-Fe2O3掺入了三维多孔石墨烯气凝胶中。石墨烯气凝胶是一个有前途的框架，可通过其丰富的反应位点用于实际的光催化，通过其独立的框架进行有效的反应物质量传递和可回收性。同时，Z方案电荷在g-C3N4，α-Fe2O3和导电石墨烯之间转移，从而抑制了光诱导电子和空穴的快速复合。三元g-C3N4 /α-Fe2O3/石墨烯气凝胶（CNFGA）显示出显着增强的光催化活性，在可见光下显示出的亚甲基蓝降解量是剥离的g-C3N4的4.75倍，光电流密度高17.5倍。此外，CNFGA通过简单的恢复方法表现出强大的光稳定性，而在五个循环后光催化性能仅下降约2％。这些结果表明，我们基于石墨烯气凝胶的三元Z型光催化剂在各种环境应用的实际光催化中具有潜在用途。