One-Step synthesis of Carbon Doped Ppy Nanoparticles interspersed 3D Porous Melamine Foam for high performance Piezoresistive Pressure, Strain, and breath Sensor

Flexible and compressible sensors have been widely used for various wearable applications; however, the devices are typically planar, expensive with limited compressibility. In this work, Carbon doped polypyrrole nanoparticles interfaced...

Salt-rejecting rGO-coated melamine foams for high-efficiency solar desalination

Solar-driven interfacial desalination has been emerged as a promising water treatment technology to generate drinkable water out of seawater. The accumulated salt crystals generated from seawater, however, have adverse effects on solar-driven interfacial evaporation. In this work, we prepared a salt-rejecting reduced graphene oxide (rGO) foam by depositing rGO particles on a hydrophilic melamine foam for solar desalination. Benefitting from the intrinsic porous microstructure and hydrophilicity, the rGO-coated melamine foam has sufficient wettability to draw water to the evaporation region, leading to rapid replenishment of water and simultaneously avoiding salt precipitation. Based on the rGO-coated melamine foam, the interfacial evaporation system can achieve a steady-state evaporation efficiency of 89.6% under a solar flux of 1 kW m−2 and has good durability under one sun over 12 h. With the high solar-to-thermal conversion efficiency and excellent long-term stability, this interfacial evaporation system exhibits the potential of commercial seawater desalination. Graphic abstract