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Low-density aerogels have shown great potential as excellent oil–water separation materials in dealing with the growing problem of marine pollution, but they typically suffer from low oil adsorption capacity, complex process flow, expensive raw materials, and poor recyclability. In this paper, inexpensive industrial raw material melamine was introduced into the framework of graphene aerogels, which can be formed into gels (NGAs) in just one step. High-temperature carbonized nitrogen-doped graphene aerogels (N0.5CGAs-2) have the advantages of ultralow density, high porosity, repeatable compressibility, hydrophobicity, and excellent adsorption capacity. In addition, depending on the characteristics of the contaminants, N0.5CGAs-2 can be selected for different recycling methods and exhibits excellent reusability in cycling. It has a high application value for solving water pollution problems caused by oil spill accidents and chemical spills. [ABSTRACT FROM AUTHOR]

Recently, wearable electronic devices and human–computer interaction are developing prosperously, which expands the requirement of flexible sensing materials. Graphene and its derivatives with extraordinary advantages are highly attractive precursors. However, it is difficult to assemble graphene into macroscopic cubes with good fatigue resistance performance. Here, we propose an efficient way to manufacture a lamellar-structural rGO aerogel with enhanced stiffness and deflection of lamellae, by using MXene as a rigidity additive. The addition of MXene (Ti3C2Tx) improves the mechanical and fatigue resistance properties of the aerogel, making it super compressible and elastic. The highly stable structure of the aerogel can withstand extremely high compressive strain of 90% and long-term compression at 50% strain for at least 10,000 cycles. The lamellar structure makes a great contribution to achieve good sensing performance including high linear sensitivity, low testing limit, wide testing strain range and quick response. These features make the MXene/rGO aerogel a promising sensing material for flexible wearable devices to monitor the subtle and obvious biosignals of the human body movement. [ABSTRACT FROM AUTHOR]