A silver-loaded zinc oxide (Ag/ZnO) photocatalyst was fabricated by chemical deposition, followed by an annealing process using a 405-nm-light-driven ZnO fiber. Silver oxide (Ag2O) was deposited on the ZnO fiber with the same method of chemical deposition using a silver-nitrate solution. Ag2O was also decomposed to Ag by annealing at 600 degrees C in a N-2 flow. The authors found that the Ag/ZnO photocatalyst had a fiber structure and that there was 405-nm-light activity. The Ag/ZnO photocatalyst containing 0.02 at. % Ag obtained via a 3.7x10(-3) mol/l AgNO3 solution had the highest photocatalytic activity of all the samples.