Fig. 2: Characterization of hierarchical solar evaporator with decoupling layers and enhanced performances.
From: Large-scale 3D printed fouling-resistant self-floating evaporator
a The digital picture of 3D concave-shaped solar evaporator with bilayer modifications. b SEM image depicting the top surface coating of A-O-P evaporator, in order from left to right are PPy nanoparticles layer (P), oxidized aluminum alloy layer (O) and aluminum alloy layer (A). The inset SEM image shows the distribution of PPy nanoparticles at high magnification, scale bar is 50 μm. c SEM image showing the oxidized aluminum alloy layer (A-O), featured with nanoparticles and nanoflakes (Inset SEM image shows its nanostructures, scale bar is 200 nm). d Schematic illustration of the components and corresponding functions of a 3D concave-shaped solar evaporator from top to bottom layers. e The solar absorption spectra of different specimens in UV-Vis (400 nm to 2 μm) and FTIR (2.5 μm to 20 μm) regions. f The thermal conductivity and Cp-table properties of A-A, A-O and A-O-P. g The anticorrosion performance of A-A, A-O, and A-O with one-time PTFE sealing treatment.
