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Nanoporous Surface Modifications through Dealloying of Al–Ti Alloy  

TiO2 nanoporous structure was formed on the surface of Al–Ti alloy through a facile chemical corrosion method. The alloy composition, NaOH concentration, reaction time, and temperature played important roles in determining the morphology, elemental composition, phase composition, and the hydrophilic properties of the as‐dealloyed samples. A uniform pore size distribution of a three‐dimensional network structure was obtained with the diameter ranged from 100 nm to 2 μm. The obtained TiO2‐based crystalline material exhibited good surface hydrophilic activity and light absorbency, which opened avenues in formation of porous nanostructures with high performance and low cost.