Formation and performance of highly absorbing solar thermal coating based on carbon nanotubes and boehmite

A highly absorbing solar thermal coating composed of an absorbing CNT layer and an antireflective AlOOH layer is fabricated by a simple and low cost spray deposition. The resulting coating shows high absorptance of 97.5% in the entire solar spectrum along with excellent adhesion of 95-100% and high thermal stability of 450 °C for 50 h.130